
---------------------------------------------------------------------

Snort 3 Upgrade Manual

---------------------------------------------------------------------

The Snort Team

Revision History
Revision 3.12.2.0 2026-04-22 20:06:59 EDT TST

---------------------------------------------------------------------

Table of Contents

1. Overview

    1.1. Efficacy
    1.2. Performance
    1.3. Scalability
    1.4. Usability
    1.5. Extensibility

2. Snort 3 vs Snort 2

    2.1. Features New to Snort 3
    2.2. Features Improved over Snort 2
    2.3. Build Options
    2.4. Command Line
    2.5. Conf File
    2.6. Rules
    2.7. Output
    2.8. Sensitive Data
    2.9. Features Not Yet Supported by Snort 3

3. Snort2Lua

    3.1. Snort2Lua Command Line
    3.2. Known Problems
    3.3. Usage

4. Configuration Changes


---------------------------------------------------------------------

1. Overview

---------------------------------------------------------------------

Snort 3.0 is an updated version of the Snort Intrusion Prevention
System (IPS) which features a new design that provides a superset of
Snort 2.X functionality with better efficacy, performance,
scalability, usability, and extensibility. Some of the key features
of Snort 3.0 are:

  * Support multiple packet processing threads
  * Use a shared configuration and attribute table
  * Autodetect services for portless configuration
  * Modular design
  * Plugin framework with over 200 plugins
  * More scalable memory profile
  * LuaJIT configuration, loggers, and rule options
  * Hyperscan support
  * Rewritten TCP handling
  * New rule parser and syntax
  * Service rules like alert http
  * Rule "sticky" buffers
  * Way better SO rules
  * New HTTP inspector
  * New performance monitor
  * New time and space profiling
  * New latency monitoring and enforcement
  * Inspection Events
  * Autogenerate reference documentation


1.1. Efficacy

--------------

  * Detects and blocks all but 10 HTTP Evader tests (see https://
    noxxi.de/research/http-evader.html).
  * Autodetection of services reduces misses due to incorrect or out
    of date port configurations and improves detection on unexpected
    command and control channels.


1.2. Performance

--------------

  * Vastly improved throughput over Snort 2 for deep flow inspection.
  * Many more fast pattern buffers means fewer non-fast pattern
    rules.
  * Hyperscan is used for faster fast patterns, content literals and
    (optionally) compatible PCRE during signature evaluation, and
    various searches done by inspectors.
  * sd_pattern rules have normal fast patterns, don’t require extra
    searches.
  * The snort3_demo repo has a performance suite that can be used to
    compare Snort 2 and Snort 3.
  * The DAQ 3 interface facilitates leveraging your data plane for
    maximum throughput including checksum offload and acquisition of
    a vector of packets.
  * Snort 3 is not run-to-completion, making it possible to detain
    packets for lookaside acceleration and other new features.


1.3. Scalability

--------------

  * Much easier to leverage multiple cores.
  * All packet threads share configuration and rule engine which
    frees up much more memory for packet processing.


1.4. Usability

--------------

  * Sticky buffers make it easier to write correct rules.
  * Autodetection eliminates much port configuration maintenance.
  * Service-based detection doesn’t preclude port-based detection.
  * Builtin defaults and policy tweaks make effective tuning much
    simpler.
  * Command line help and generated reference documentation make it
    easy to get the correct configuration details.
  * A trace mechanism is provided to make it easy to see how packets
    are processed.
  * Build a scaled down image and configure for smaller systems such
    as IoT devices.
  * The snort2lua utility (described later) makes it easy to convert
    your local rules.
  * Extensive peg counts capture the important events and actions to
    provide more detailed insight into your deployment.


1.5. Extensibility

--------------

  * Several plugin types are defined and over 220 plugins are
    available.
  * Inspection events make collaboration among plugins possible
    without framework updates.
  * All plugins, including SO rules, can be mixed in the same
    library.
  * A command line shell is available for reloads and other
    operations.
  * The snort3_extra repo has examples to each plugin type to help
    you get started.
  * Easy to add SO rules for 0-day attacks.


---------------------------------------------------------------------

2. Snort 3 vs Snort 2

---------------------------------------------------------------------


2.1. Features New to Snort 3

--------------

Some things Snort++ can do today that Snort can not do:

  * regex fast patterns, not just literals
  * JSON perf monitor logs
  * LuaJIT scriptable rule options and loggers
  * pub/sub inspection events (currently used by sip and http_inspect
    to appid)
  * JIT buffer stuffers (notably with new http_inspect)
  * C-style comments in rules
  * #begin … #end comment blocks in rules
  * rule remarks (comment is part of rule, not just in it)
  * process raw files (eg read a PDF and do file processing)
  * process raw payload (eg bridge 2 sockets and do inspection)
  * fast pattern offload to separate thread (experimental)
  * add or override any config item on command line
  * set CPU affinity
  * pause and resume commands


2.2. Features Improved over Snort 2

--------------

Some things Snort++ can do today that Snort can not do as well:

+-------------------------------------------------------------------+
|Feature          |Snort 2            |Snort 3                      |
|-----------------+-------------------+-----------------------------|
|Packet Threads   |1 per process      |N per process                |
|-----------------+-------------------+-----------------------------|
|Config Memory Use|N processes * M GB |M GB total, more for packets |
|-----------------+-------------------+-----------------------------|
|Config Reload    |N processes, slower|1 thread, can be pinned to   |
|                 |                   |separate core                |
|-----------------+-------------------+-----------------------------|
|Startup          |Single threaded,   |Multithreaded, faster        |
|                 |slower             |                             |
|-----------------+-------------------+-----------------------------|
|Plugins          |Limited to preprocs|Full plugin system with over |
|                 |and outputs        |230 plugins                  |
|-----------------+-------------------+-----------------------------|
|Plugin Examples  |DPX preproc        |snort3_extra repo, all types,|
|                 |                   |LuaJIT                       |
|-----------------+-------------------+-----------------------------|
|DAQ              |2.X, run to        |3.X, vector input, multiple  |
|                 |completion         |outstanding packets          |
|-----------------+-------------------+-----------------------------|
|DAQ Modules      |Legacy modules     |Stacked modules, IOCTLs,     |
|                 |                   |file, socket, text modules   |
|-----------------+-------------------+-----------------------------|
|Pcap Readback    |X Mbits/sec for    |2X with ac, 4X with hyperscan|
|Speed            |Max-Detect         |                             |
|-----------------+-------------------+-----------------------------|
|IP Layers        |2 max              |Arbitrary / configurable     |
|                 |                   |limits                       |
|-----------------+-------------------+-----------------------------|
|IP Reputation    |Complex, shared    |Simplified process memory    |
|                 |memory             |                             |
|-----------------+-------------------+-----------------------------|
|Stream TCP       |Complex            |New and improved             |
|                 |implementation     |implementation               |
|-----------------+-------------------+-----------------------------|
|Service detection|appid only, port   |Autodetection, most port     |
|                 |configs required   |configs optional             |
|-----------------+-------------------+-----------------------------|
|HTTP inspector   |Partly stateful    |Fully stateful               |
|-----------------+-------------------+-----------------------------|
|HTTP Evader      |65 misses          |10 misses                    |
|-----------------+-------------------+-----------------------------|
|Port Scan        |High, medium, low  |Fully configurable detection |
|Detection        |thresholds only    |thresholds                   |
|-----------------+-------------------+-----------------------------|
|Config parsing   |Report one error   |Report all errors            |
|                 |and quit           |                             |
|-----------------+-------------------+-----------------------------|
|Config syntax    |Irregular, static, |Lua, fully scriptable,       |
|                 |limited variables  |arbitrary variables          |
|-----------------+-------------------+-----------------------------|
|Command Line     |Some overlap with  |Set or override any config   |
|                 |config file        |from command line            |
|-----------------+-------------------+-----------------------------|
|Default Config   |Complex, needs     |Simplified, effective default|
|                 |tuning             |config                       |
|-----------------+-------------------+-----------------------------|
|Policy Examples  |None               |Tweaks for all standard Talos|
|                 |                   |policies                     |
|-----------------+-------------------+-----------------------------|
|Policy Bindings  |One level          |Nested                       |
|-----------------+-------------------+-----------------------------|
|Rule syntax      |Inconsistent,      |Uniform syntax, arbitrary    |
|                 |requires line      |whitespace                   |
|                 |escapes            |                             |
|-----------------+-------------------+-----------------------------|
|Rule parsing     |Buggy, limited     |Robust, many optional        |
|                 |warnings           |warnings                     |
|-----------------+-------------------+-----------------------------|
|Rule comments    |# comments only    |#, #begin/#end, C-style, rem |
|                 |                   |option                       |
|-----------------+-------------------+-----------------------------|
|Rule input       |Config includes    |Includes, external file or   |
|                 |only               |path, stdin                  |
|-----------------+-------------------+-----------------------------|
|Hyperscan        |External patch     |Native support, regex fast   |
|                 |available          |patterns                     |
|-----------------+-------------------+-----------------------------|
|Sensitive Data   |Requires a slow,   |Normal fast pattern rule     |
|                 |extra search       |                             |
|-----------------+-------------------+-----------------------------|
|alert file rules |No                 |Yes                          |
|-----------------+-------------------+-----------------------------|
|alert service    |No                 |Yes                          |
|rules            |                   |                             |
|-----------------+-------------------+-----------------------------|
|fast_pattern_only|Hand optimization  |Automatic optimization       |
|-----------------+-------------------+-----------------------------|
|Fast Pattern     |6 available        |14 available                 |
|Buffers          |                   |                             |
|-----------------+-------------------+-----------------------------|
|Elided rule      |No                 |Yes (omit nets and/or ports) |
|headers          |                   |                             |
|-----------------+-------------------+-----------------------------|
|Rule sticky      |Some               |All buffers are sticky       |
|buffers          |                   |                             |
|-----------------+-------------------+-----------------------------|
|SO rule features |Restricted         |True superset of text rules  |
|                 |functionality      |                             |
|-----------------+-------------------+-----------------------------|
|Simple SO rules  |No (based on       |Yes (based on text rule)     |
|                 |tedious C-structs) |                             |
|-----------------+-------------------+-----------------------------|
|Dump builtin     |No (SO stubs only) |Yes                          |
|stubs            |                   |                             |
|-----------------+-------------------+-----------------------------|
|Runtime tracing  |No (debug traces   |Yes                          |
|                 |and misc logs only)|                             |
|-----------------+-------------------+-----------------------------|
|Event Logging    |Legacy unified2    |JSON recommended, integrates |
|                 |recommended        |with ELK stack, etc.         |
|-----------------+-------------------+-----------------------------|
|Statistics       |Limited counts,    |2X counts, configurable perf |
|                 |fixed perf monitor |monitor                      |
|-----------------+-------------------+-----------------------------|
|Control interface|Limited binary     |Extensible text shell, socket|
|                 |interface          |access                       |
|-----------------+-------------------+-----------------------------|
|Documentation    |LaTeX-based PDF,   |Asciidoc text, html, and PDF |
|                 |READMEs            |(user, ref, dev, upgrade)    |
|-----------------+-------------------+-----------------------------|
|Command line help|No                 |Extensive, supports data     |
|                 |                   |driven management            |
|-----------------+-------------------+-----------------------------|
|Build system     |Automake, Linux,   |Cmake, Linux, *BSD, Mac      |
|                 |*BSD, Windows      |                             |
|-----------------+-------------------+-----------------------------|
|Startup /        |Noisy, limited     |Clean, extensible, non-zero  |
|Shutdown         |                   |counts only                  |
|-----------------+-------------------+-----------------------------|
|Sig Quit         |Same as Sig Term   |Quick exit                   |
|                 |and Sig Int        |                             |
|-----------------+-------------------+-----------------------------|
|Source Code      |470K lines C, avg  |389K lines C++, avg 200 lines|
|                 |400 lines/file     |/file                        |
|-----------------+-------------------+-----------------------------|
|Tests            |A few unit tests   |Many unit tests, snort3_demo |
|                 |                   |suite                        |
|-----------------+-------------------+-----------------------------|
|Distribution     |snort.org tarballs,|github repo, ~2 week updates |
|                 |~6 month updates   |                             |
+-------------------------------------------------------------------+


2.3. Build Options

--------------

  * configure --with-lib{pcap,pcre}-* → --with-{pcap,pcre}-*
  * control socket, cs_dir, and users were deleted
  * POLICY_BY_ID_ONLY code was deleted
  * hardened --enable-inline-init-failopen / INLINE_FAILOPEN


2.4. Command Line

--------------

  * --pause loads config and waits for resume before processing
    packets
  * --require-rule-sid is hardened
  * --shell enables interactive Lua shell
  * -T is assumed if no input given
  * added --help-config prefix to dump all matching settings
  * added --script-path
  * added -L none|dump|pcap
  * added -z <#> and --max-packet-threads <#>
  * delete --enable-mpls-multicast, --enable-mpls-overlapping-ip,
    --max-mpls-labelchain-len, --mpls-payload-type
  * deleted --pid-path and --no-interface-pidfile
  * deleting command line options which will be available with --lua
    or some such including: -I, -h, -F, -p,
    --disable-inline-init-failopen
  * hardened -n < 0
  * removed --search-method
  * replaced "unknown args are bpf" with --bpf
  * replaced --dynamic-*-lib[-dir] with --plugin-path (with :
    separators)
  * removed -b, -N, -Z and, --perfmon-file options


2.5. Conf File

--------------

  * Snort 3 has a default unicode.map
  * Snort 3 will not enforce an upper bound on memcaps and the like
    within 64 bits
  * Snort 3 will supply a default *_global config if not specified
    (Snort 2 would fatal; e.g. http_inspect_server w/o
    http_inspect_global)
  * address list syntax changes: [[ and ]] must be [ [ and ] ] to
    avoid Lua string parsing errors (unless in quoted string)
  * because the Lua conf is live code, we lose file:line locations in
    app error messages (syntax errors from Lua have file:line)
  * changed search-method names for consistency
  * delete config include_vlan_in_alerts (not used in code)
  * delete config so_rule_memcap (not used in code)
  * deleted --disable-attribute-table-reload-thread
  * deleted config decode_*_{alerts,drops} (use rules only)
  * deleted config dump-dynamic-rules-path
  * deleted config ipv6_frag (not actually used)
  * deleted config threshold and ips rule threshold (→ event_filter)
  * eliminated ac-split; must use ac-full-q split-any-any
  * frag3 → defrag, arpspoof → arp_spoof, sfportscan → port_scan,
    perfmonitor → perf_monitor, bo → back_orifice
  * limits like "1234K" are now "limit = 1234, units = K"
  * lua field names are (lower) case sensitive; snort.conf largely
    wasn’t
  * module filenames are not configurable: always <log-dir>/
    <module-name><suffix> (suffix is determined by module)
  * no positional parameters; all name = value
  * perf_monitor configuration was simplified
  * portscan.detect_ack_scans deleted (exact same as
    include_midstream)
  * removed various run modes - now just one
  * frag3 default policy is Linux not bsd
  * lowmem* search methods are now in snort_examples
  * deleted unused http_inspect stateful mode
  * deleted stateless inspection from ftp and telnet
  * deleted http and ftp alert options (now strictly rule based)
  * preprocessor disabled settings deleted since no longer relevant
  * sessions are always created; snort config stateful checks
    eliminated
  * stream5_tcp: prune_log_max deleted; to be replaced with histogram
  * stream5_tcp: max_active_responses, min_response_seconds moved to
    active.max_responses, min_interval
  * ips policies support snort variables configured based on type,
    ips = { variables = { nets = { var1 = expr1, … }, paths = { var2
    = expr2, … }, ports = { var3 = expr3, … } } }


2.6. Rules

--------------

  * all rules must have a sid
  * sid == 0 not allowed
  * deleted activate / dynamic rules
  * deleted metadata engine shared
  * deleted metadata: rule-flushing (with PDU flushing rule flushing
    can cause missed attacks, the opposite of its intent)
  * changed metadata:service one[, service two]; to service:one[,
    two];
  * soid is now a non-metadata option
  * metadata is now truly metadata with no impact on detection (Snort
    doesn’t care about metadata internal structure / syntax)
  * deleted fast_pattern:only; use fast_pattern, nocase (option is
    not added to detection tree if not required)
  * changed fast_pattern:<offset>,<length> to
    fast_pattern,fast_pattern_offset <offset>,fast_pattern_length
    <length>
  * fast pattern sensitive data with sd_pattern using hyperscan
  * hyperscan regex fast patterns with regex:"<regex>", fast_pattern;
  * no ; separated content suboptions
  * offset, depth, distance, and within must use a space separator
    not colon (e.g. offset:5; becomes offset 5;)
  * content suboptions http_* are now full options
  * added sticky buffers: buffer selector options must precede
    contents and remain in effect until changed
  * the following pcre options have been deleted: use sticky buffers
    instead B, U, P, H, M, C, I, D, K, S, Y
  * deleted uricontent option; use sticky buffer uricontent:"foo" -→
    http_uri; content:"foo"
  * deleted urilen raw and norm; must use http_raw_uri and http_uri
    instead
  * deleted unused http_encode option
  * urilen replaced with generic bufferlen which applies to current
    sticky buffer
  * added optional selector to http_header, e.g.
    http_header:User-Agent;
  * the all new http_inspect has new buffers and rule options
  * added alert file and alert service rules (service in body not
    required if there is only one and it is in header; alert service
    / file rules disable fast pattern searching of raw packets)
  * rule option sequence: <stub> soid <hidden>
  * arbitrary whitespace and multiline rules w/o \n
  * #begin … #end comments to easily comment out multiple lines
  * add rule remarks option with rem:"arbitrary comment"
  * nets and/or ports may be omitted from rule headers (matches any)
  * parse all rules and output all errors before quitting
  * read rules from conf, separate rules file, or stdin
  * The symbol =< in a byte test is recognized as a syntax error. The
    correct symbol is <=.


2.7. Output

--------------

  * alert_fast includes packet data by default
  * all text mode outputs default to stdout
  * changed default logging mode to -L none
  * deleted layer2resets and flexresp2_*
  * deleted log_ascii
  * general output guideline: don’t print zero counts
  * Snort 3 queues decoder and inspector events to the main event
    queue before ips policy is selected; since some events may not be
    enabled, the queue needs to be sized larger than with Snort 2
    which used an intermediate queue for decoder events.
  * deleted the intermediate http and ftp_telnet event queues
  * alert_unified2 and log_unified2 have been deleted


2.8. Sensitive Data

--------------

The Snort 2.X SDF Preprocessor is gone, replaced by ips option
sd_pattern. The sd_pattern rule option is synonymous with the
sd_pattern option used for gid:138 rules, but has a different syntax.
A major difference in syntax is the use of Hyperscan pattern matching
library which provides a regex language similar to PCRE.

To facilitate continued performance, sd_pattern rule option is
implemented with Hyperscan pattern matching library. The rule option
is now also utilized as a "fast pattern" in the Snort engine which
provides a significant performance improvement over the separate
detection step of earlier implementations.

The preprocessor alert SDF_COMBO_ALERT (139:1) has been removed and
has no replacement in Snort 3.X. This is because the rule offered no
additional value over gid:138 rules and was difficult to interpret
the result of.

For more information, See Features > Sensitive Data Filtering for
details.


2.9. Features Not Yet Supported by Snort 3

--------------

  * Support in http_inspect for Original Client IP is limited to the
    X-Forwarded-For and True-Client-IP headers in that order. It is
    not possible to configure additional custom headers to search for
    Original Client IP.


---------------------------------------------------------------------

3. Snort2Lua

---------------------------------------------------------------------

One of the major differences between Snort 2 and Snort 3 is the
configuration. Snort 2 configuration files are written in
Snort-specific syntax while Snort 3 configuration files are written
in Lua. Snort2Lua is a program specifically designed to convert valid
Snort 2 configuration files into Lua files that Snort 3 can
understand.

Snort2Lua reads your legacy Snort conf file(s) and generates Snort 3
Lua and rules files. When running this program, the only mandatory
option is to provide Snort2Lua with a Snort 2 configuration file. The
default output file file is snort.lua, the default error file will be
snort.rej, and the default rule file is the output file (default is
snort.lua). When Snort2Lua finishes running, the resulting
configuration file can be successfully run as the Snort3.0
configuration file. The sole exception to this rule is when Snort2Lua
cannot find an included file. If that occurs, the file will still be
included in the output file and you will need to manually adjust or
comment the file name. Additionally, if the exit code is not zero,
some of the information may not be successfully converted. Check the
error file for all of the conversion problems.

Those errors can occur for a multitude of reasons and are not
necessarily bad. Snort2Lua expects a valid Snort 2 configuration.
Therefore, if the configuration is invalid or has questionable
syntax, Snort2Lua may fail to parse the configuration file or create
an invalid Snort 3 configuration file.

There are a also few peculiarities of Snort2Lua that may be confusing
to a first time user:

  * Aside from an initial configuration file (which is specified from
    the command line or as the file in ‘config binding’), every file
    that is included into Snort 3 must be either a Lua file or a rule
    file; the file cannot contain both rules and Lua syntax.
    Therefore, when parsing a file specified with the ‘include’
    command, Snort2Lua will output both a Lua file and a rule file.
  * Any line that is a comment in a configuration file will be added
    in to a comments section at the bottom of the main configuration
    file.
  * Rules that contain unsupported options will be converted to the
    best of Snort2Lua’s capability and then printed as a comment in
    the rule file.
  * Files with a .rules suffix are assumed to be Talos 2.X rules
    files and converted line-by-line. In this case, lines starting
    with alert are converted as usual but lines starting with # alert
    are assumed to be commented out rules which are converted to 3.0
    format and remain comments in the output file. All other comments
    are passed through directly. There is no support for other
    commented rule actions since these do not appear in Talos rules
    files.


3.1. Snort2Lua Command Line

--------------

By default, Snort2Lua will attempt to parse every ‘include’ file and
every ‘binding’ file. There is an option to change this
functionality.

When specifying a rule file with one of the command line options,
Snort2Lua will output all of the converted rules to that specified
rule file. This is especially useful when you are only interesting in
converting rules since there is no Lua syntax in rule files. There is
also an option that tells Snort2Lua to output every rule for a given
configuration into a single rule file. Similarly, there is an option
pull all of the Lua syntax from every ‘include’ file into the output
file.

There are currently three output modes: default, quiet, and
differences. As expected, quiet mode produces a Snort configuration.
All errors (aside from Fatal Snort2Lua errors), differences, and
comments will omitted from the final output file. Default mode will
print everything. That mean you will be able to see exactly what
changes have occurred between Snort 2 and Snort 3 in addition to the
new syntax, the original file’s comments, and all errors that have
occurred. Finally, differences mode will not actually output a valid
Snort 3 configuration. Instead, you can see the exact options from
the input configuration that have changed.

3.1.1. Usage: snort2lua [OPTIONS]… -c <snort_conf> …

Converts the Snort configuration file specified by the -c or
--conf-file options into a Snort++ configuration file

3.1.1.1. Options:

  * -? show usage
  * -h this overview of snort2lua
  * -a default option. print all data
  * -c <snort_conf> The Snort <snort_conf> file to convert
  * -d print the differences, and only the differences, between the
    Snort and Snort++ configurations to the <out_file>
  * -e <error_file> output all errors to <error_file>
  * -i if <snort_conf> file contains any <include_file> or
    <policy_file> (i.e. include path/to/conf/other_conf), do NOT
    parse those files
  * -m add a remark to the end of every converted rule
  * -o <out_file> output the new Snort++ lua configuration to
    <out_file>
  * -q quiet mode. Only output valid configuration information to the
    <out_file>
  * -r <rule_file> output any converted rule to <rule_file>
  * -s when parsing <include_file>, write <include_file>'s rules to
    <rule_file>. Meaningless if -i provided
  * -t when parsing <include_file>, write <include_file>'s
    information, excluding rules, to <out_file>. Meaningless if -i
    provided
  * -V Print the current Snort2Lua version
  * --bind-wizard Add default wizard to bindings
  * --bind-port Convert port bindings
  * --conf-file Same as -c. A Snort <snort_conf> file which will be
    converted
  * --dont-parse-includes Same as -p. if <snort_conf> file contains
    any <include_file> or <policy_file> (i.e. include path/to/conf/
    other_conf), do NOT parse those files
  * --dont-convert-max-sessions do not convert max_tcp, max_udp,
    max_icmp, max_ip to max_session
  * --error-file=<error_file> Same as -e. output all errors to
    <error_file>
  * --help Same as -h. this overview of snort2lua
  * --ips-policy-pattern Convert config bindings matching this path
    to ips policy bindings
  * --markup print help in asciidoc compatible format
  * --output-file=<out_file> Same as -o. output the new Snort++ lua
    configuration to <out_file>
  * --print-all Same as -a. default option. print all data
  * --print-differences Same as -d. output the differences, and only
    the differences, between the Snort and Snort++ configurations to
    the <out_file>
  * --quiet Same as -q. quiet mode. Only output valid configuration
    information to the <out_file>
  * --remark same as -m. add a remark to the end of every converted
    rule
  * --rule-file=<rule_file> Same as -r. output any converted rule to
    <rule_file>
  * --single-conf-file Same as -t. when parsing <include_file>, write
    <include_file>'s information, excluding rules, to <out_file>
  * --single-rule-file Same as -s. when parsing <include_file>, write
    <include_file>'s rules to <rule_file>.
  * --version Same as -V. Print the current Snort2Lua version

3.1.1.2. Required option:

  * A Snort configuration file to convert. Set with either -c or 
    --conf-file

3.1.1.3. Default values:

  * <out_file> = snort.lua
  * <rule_file> = <out_file> = snort.lua. Rules are written to the 
    local_rules variable in the <out_file>
  * <error_file> = snort.rej. This file will not be created in quiet
    mode.


3.2. Known Problems

--------------

  * Any Snort 2 ‘string’ which is dependent on a variable will no
    longer have that variable in the Lua string.
  * Snort2Lua currently does not handle variables well. First, that
    means variables will not always be parsed correctly. Second,
    sometimes a variables value will be output in the lua file rather
    than a variable For instance, if Snort2Lua attempted to convert
    the line include $RULE_PATH/example.rule, the output may output 
    include /etc/rules/example.rule instead.
  * When Snort2Lua parses a ‘binding’ configuration file, the rules
    and configuration will automatically be combined into the same
    file. Also, the new files name will automatically become the old
    file’s name with a .lua extension. There is currently no way to
    specify or change that files name.
  * If a rule’s action is a custom ruletype, that rule action will be
    silently converted to the rule’s type. No warnings or errors are
    currently emitted. Additionally, the custom ruletypes outputs
    will be silently discarded.
  * If the original configuration contains a binding that points to
    another file and the binding file contains an error, Snort2Lua
    will output the number of rejects for the binding file in
    addition to the number of rejects in the main file. The two
    numbers will eventually be combined into one output.
  * If the original configuration contains a replace rule with alert
    action, Snort2Lua won’t translate the rule from alert to rewrite
    action. It will keep the action as alert, which does not actually
    replace the content in Snort 3. To replace content, the rule
    action needs to be rewrite, which can be added manually or by
    tooling.


3.3. Usage

--------------

Snort2Lua is included in the Snort 3 distribution. The Snort2Lua
source code is located in the tools/snort2lua directory. The program
is automatically built and installed.

Translating your configuration

To run Snort2Lua, the only requirement is a file containing Snort 2
syntax. Assuming your configuration file is named snort.conf, run the
command

snort2lua –c snort.conf

Snort2Lua will output a file named snort.lua. Assuming your
snort.conf file is a valid Snort 2 configuration file, than the
resulting snort.lua file will always be a valid Snort 3 configuration
file; any errors that occur are because Snort 3 currently does not
support all of the Snort 2 options.

Every keyword from the Snort configuration can be found in the output
file. If the option or keyword has changed, then a comment containing
both the option or keyword’s old name and new name will be present in
the output file.

Translating a rule file

Snort2Lua can also accommodate translating individual rule files.
Assuming the Snort 2 rule file is named snort.rules and you want the
new rule file to be name updated.rules, run the command

snort2lua –c snort.rules -r updated.rules

Snort2Lua will output a file named updated.rules. That file,
updated.rules, will always be a valid Snort 3 rule file. Any rule
that contains unsupported options will be a comment in the output
file.

Understanding the Output

Although Snort2Lua outputs very little to the console, there are
several things that occur when Snort2Lua runs. This is a list of
Snort2Lua outputs.

The console. Every line that Snort2Lua is unable to translate from
the Snort 2.X format to the Snort 3 format is considered an error.
Upon exiting, Snort2Lua will print the number of errors that
occurred. Snort2Lua will also print the name of the error file.

The output file. As previously mentioned, Snort2Lua will create a Lua
file with valid Snort 3 syntax. The default Lua file is named
snort.lua. This file is the equivalent of your main Snort 2
configuration file.

The rule file. By default, all rules will be printed to the Lua file.
However, if a rule file is specified on the command line, any rules
found in the Snort 2 configuration will be written to the rule file
instead

The error file. By default, the error file is snort.rej. It will only
be created if errors exist. Every error referenced on the command
line can be found in this file. There are two reasons an error can
occur.

  * The Snort 2 configuration file has invalid syntax. If Snort 2
    cannot parse the configuration file, neither can Snort2Lua. In
    the example below, Snort2Lua could not convert the line config
    bad_option. Since that is not valid Snort 2 syntax, this is a
    syntax error.
  * The Snort 2 configuration file contains preprocessors and rule
    options that are not supported in Snort 3. If Snort 2 can parse a
    line that Snort2Lua cannot parse, than Snort 3 does not support
    something in the line. As Snort 3 begins supporting these
    preprocessors and rule options, Snort2Lua will also begin
    translating these lines. One example of such an error is dcerpc2.

Additional .lua and .rules files. Every time Snort2Lua parses the
include or binding keyword, the program will attempt to parse the
file referenced by the keyword. Snort2Lua will then create one or two
new files. The new files will have a .lua or .rules extension
appended to the original filename.


---------------------------------------------------------------------

4. Configuration Changes

---------------------------------------------------------------------

change -> attribute_table: 'STREAM_POLICY' ==> 'hosts: tcp_policy'
change -> attribute_table: 'filename <file_name>' ==> 'hosts[]'
change -> config 'addressspace_agnostic'  ==> 'packets.address_space_agnostic'
change -> config 'checksum_mode'  ==> 'network.checksum_eval'
change -> config 'daq_dir'  ==> 'daq.module_dirs'
change -> config 'detection_filter'  ==> 'alerts.detection_filter_memcap'
change -> config 'enable_deep_teredo_inspection'  ==> 'udp.deep_teredo_inspection'
change -> config 'enable_mpls_overlapping_ip'  ==> 'packets.mpls_agnostic'
change -> config 'event_filter'  ==> 'alerts.event_filter_memcap'
change -> config 'max_attribute_hosts'  ==> 'attribute_table.max_hosts'
change -> config 'max_attribute_services_per_host'  ==> 'attribute_table.max_services_per_host'
change -> config 'nopcre'  ==> 'detection.pcre_enable'
change -> config 'pkt_count'  ==> 'packets.limit'
change -> config 'rate_filter'  ==> 'alerts.rate_filter_memcap'
change -> config 'react'  ==> 'react.page'
change -> config 'threshold'  ==> 'alerts.event_filter_memcap'
change -> converter: 'gen_id' ==> 'gid'
change -> converter: 'sid_id' ==> 'sid'
change -> csv: 'csv' ==> 'fields'
change -> csv: 'dgmlen' ==> 'pkt_len'
change -> csv: 'dst' ==> 'dst_addr'
change -> csv: 'dstport' ==> 'dst_port'
change -> csv: 'ethdst' ==> 'eth_dst'
change -> csv: 'ethlen' ==> 'eth_len'
change -> csv: 'ethsrc' ==> 'eth_src'
change -> csv: 'ethtype' ==> 'eth_type'
change -> csv: 'icmpcode' ==> 'icmp_code'
change -> csv: 'icmpid' ==> 'icmp_id'
change -> csv: 'icmpseq' ==> 'icmp_seq'
change -> csv: 'icmptype' ==> 'icmp_type'
change -> csv: 'id' ==> 'ip_id'
change -> csv: 'iplen' ==> 'ip_len'
change -> csv: 'sig_generator' ==> 'gid'
change -> csv: 'sig_id' ==> 'sid'
change -> csv: 'sig_rev' ==> 'rev'
change -> csv: 'src' ==> 'src_addr'
change -> csv: 'srcport' ==> 'src_port'
change -> csv: 'tcpack' ==> 'tcp_ack'
change -> csv: 'tcpflags' ==> 'tcp_flags'
change -> csv: 'tcplen' ==> 'tcp_len'
change -> csv: 'tcpseq' ==> 'tcp_seq'
change -> csv: 'tcpwindow' ==> 'tcp_win'
change -> csv: 'udplength' ==> 'udp_len'
change -> daq: 'config daq:' ==> 'name'
change -> daq_mode: 'config daq_mode:' ==> 'mode'
change -> daq_var: 'config daq_var:' ==> 'variables'
change -> detection: 'ac' ==> 'ac_full'
change -> detection: 'ac-banded' ==> 'ac_full'
change -> detection: 'ac-bnfa' ==> 'ac_bnfa'
change -> detection: 'ac-bnfa-nq' ==> 'ac_bnfa'
change -> detection: 'ac-bnfa-q' ==> 'ac_bnfa'
change -> detection: 'ac-nq' ==> 'ac_full'
change -> detection: 'ac-q' ==> 'ac_full'
change -> detection: 'ac-sparsebands' ==> 'ac_full'
change -> detection: 'ac-split' ==> 'ac_full'
change -> detection: 'ac-split' ==> 'split_any_any'
change -> detection: 'ac-std' ==> 'ac_full'
change -> detection: 'acs' ==> 'ac_full'
change -> detection: 'bleedover-port-limit' ==> 'bleedover_port_limit'
change -> detection: 'debug-print-fast-pattern' ==> 'show_fast_patterns'
change -> detection: 'intel-cpm' ==> 'hyperscan'
change -> detection: 'lowmem-nq' ==> 'lowmem'
change -> detection: 'lowmem-q' ==> 'lowmem'
change -> detection: 'max-pattern-len' ==> 'max_pattern_len'
change -> detection: 'no_stream_inserts' ==> 'detect_raw_tcp'
change -> detection: 'search-method' ==> 'search_method'
change -> detection: 'split-any-any' ==> 'split_any_any = true by default'
change -> detection: 'split-any-any' ==> 'split_any_any'
change -> dnp3: 'ports' ==> 'bindings'
change -> dns: 'ports' ==> 'bindings'
change -> dynamicdetection ==> 'snort.--plugin_path=<path>'
change -> dynamicengine ==> 'snort.--plugin_path=<path>'
change -> dynamicpreprocessor ==> 'snort.--plugin_path=<path>'
change -> dynamicsidechannel ==> 'snort.--plugin_path=<path>'
change -> event_filter: 'gen_id' ==> 'gid'
change -> event_filter: 'sig_id' ==> 'sid'
change -> event_filter: 'threshold' ==> 'event_filter'
change -> file: 'config file: file_block_timeout' ==> 'block_timeout'
change -> file: 'config file: file_capture_block_size' ==> 'capture_block_size'
change -> file: 'config file: file_capture_max' ==> 'capture_max_size'
change -> file: 'config file: file_capture_memcap' ==> 'capture_memcap'
change -> file: 'config file: file_capture_min' ==> 'capture_min_size'
change -> file: 'config file: file_type_depth' ==> 'type_depth'
change -> file: 'config file: signature' ==> 'enable_signature'
change -> file: 'config file: type_id' ==> 'enable_type'
change -> file: 'ver' ==> 'version'
change -> frag3_engine: 'min_fragment_length' ==> 'min_frag_length'
change -> frag3_engine: 'overlap_limit' ==> 'max_overlaps'
change -> frag3_engine: 'policy bsd-right' ==> 'policy = bsd_right'
change -> frag3_engine: 'timeout' ==> 'session_timeout'
change -> ftp_telnet_protocol: 'alt_max_param_len' ==> 'cmd_validity'
change -> ftp_telnet_protocol: 'data_chan' ==> 'ignore_data_chan'
change -> ftp_telnet_protocol: 'ports' ==> 'bindings'
change -> gtp: 'ports' ==> 'bindings'
change -> http_inspect_server: 'bare_byte' ==> 'utf8_bare_byte'
change -> http_inspect_server: 'client_flow_depth' ==> 'request_depth'
change -> http_inspect_server: 'double_decode' ==> 'iis_double_decode'
change -> http_inspect_server: 'http_inspect_server' ==> 'http_inspect'
change -> http_inspect_server: 'iis_backslash' ==> 'backslash_to_slash'
change -> http_inspect_server: 'inspect_gzip' ==> 'unzip'
change -> http_inspect_server: 'non_rfc_char' ==> 'bad_characters'
change -> http_inspect_server: 'ports' ==> 'bindings'
change -> http_inspect_server: 'u_encode' ==> 'percent_u'
change -> http_inspect_server: 'utf_8' ==> 'utf8'
change -> imap: 'ports' ==> 'bindings'
change -> modbus: 'ports' ==> 'bindings'
change -> na_policy_mode: 'na_policy_mode' ==> 'mode'
change -> paf_max: 'paf_max [0:63780]' ==> 'max_pdu [1460:32768]'
change -> perfmonitor: 'console' ==> 'format = 'text''
change -> perfmonitor: 'console' ==> 'output = 'console''
change -> perfmonitor: 'file' ==> 'format = 'csv''
change -> perfmonitor: 'file' ==> 'output = 'file''
change -> perfmonitor: 'flow-file' ==> 'format = 'csv''
change -> perfmonitor: 'flow-file' ==> 'output = 'file''
change -> perfmonitor: 'flow-ip' ==> 'flow_ip'
change -> perfmonitor: 'flow-ip-file' ==> 'format = 'csv''
change -> perfmonitor: 'flow-ip-file' ==> 'output = 'file''
change -> perfmonitor: 'flow-ip-memcap' ==> 'flow_ip_memcap'
change -> perfmonitor: 'flow-ports' ==> 'flow_ports'
change -> perfmonitor: 'pktcnt' ==> 'packets'
change -> perfmonitor: 'snortfile' ==> 'format = 'csv''
change -> perfmonitor: 'snortfile' ==> 'output = 'file''
change -> perfmonitor: 'time' ==> 'seconds'
change -> policy_mode: 'inline_test' ==> 'inline-test'
change -> pop: 'ports' ==> 'bindings'
change -> ppm: 'fastpath-expensive-packets' ==> 'packet.fastpath'
change -> ppm: 'max-pkt-time' ==> 'packet.max_time'
change -> ppm: 'max-rule-time' ==> 'rule.max_time'
change -> ppm: 'ppm' ==> 'latency'
change -> ppm: 'suspend-expensive-rules' ==> 'rule.suspend'
change -> ppm: 'suspend-timeout' ==> 'max_suspend_time'
change -> ppm: 'threshold' ==> 'rule.suspend_threshold'
change -> preprocessor 'normalize_icmp4' ==> 'normalize.icmp4'
change -> preprocessor 'normalize_icmp6' ==> 'normalize.icmp6'
change -> preprocessor 'normalize_ip6' ==> 'normalize.ip6'
change -> profile: 'print' ==> 'count'
change -> profile: 'sort avg_ticks' ==> 'sort = avg_check'
change -> profile: 'sort total_ticks' ==> 'sort = total_time'
change -> rate_filter: 'gen_id' ==> 'gid'
change -> rate_filter: 'sig_id' ==> 'sid'
change -> reputation: 'shared_mem' ==> 'list_dir'
change -> sfportscan: 'proto' ==> 'protos'
change -> sfportscan: 'scan_type' ==> 'scan_types'
change -> sip: 'max_requestName_len' ==> 'max_request_name_len'
change -> sip: 'ports' ==> 'bindings'
change -> smtp: 'ports' ==> 'bindings'
change -> ssh: 'server_ports' ==> 'bindings'
change -> ssl: 'ports' ==> 'bindings'
change -> stream5_global: 'max_active_responses' ==> 'max_responses'
change -> stream5_global: 'min_response_seconds' ==> 'min_interval'
change -> stream5_global: 'tcp_cache_nominal_timeout' ==> 'idle_timeout'
change -> stream5_global: 'udp_cache_nominal_timeout' ==> 'idle_timeout'
change -> stream5_ha: 'min_session_lifetime' ==> 'min_age'
change -> stream5_ha: 'min_sync_interval' ==> 'min_sync'
change -> stream5_ha: 'stream5_ha' ==> 'high_availability'
change -> stream5_ha: 'use_daq' ==> 'daq_channel'
change -> stream5_ip: 'timeout' ==> 'session_timeout'
change -> stream5_tcp: 'bind_to' ==> 'bindings'
change -> stream5_tcp: 'dont_reassemble_async' ==> 'reassemble_async'
change -> stream5_tcp: 'max_queued_bytes' ==> 'queue_limit.max_bytes'
change -> stream5_tcp: 'max_queued_segs' ==> 'queue_limit.max_segments'
change -> stream5_tcp: 'policy hpux' ==> 'stream_tcp.policy = hpux11'
change -> stream5_tcp: 'timeout' ==> 'session_timeout'
change -> stream5_udp: 'timeout' ==> 'session_timeout'
change -> suppress: 'gen_id' ==> 'gid'
change -> suppress: 'sig_id' ==> 'sid'
change -> syslog: 'log_alert' ==> 'level = alert'
change -> syslog: 'log_auth' ==> 'facility = auth'
change -> syslog: 'log_authpriv' ==> 'facility = authpriv'
change -> syslog: 'log_cons' ==> 'options = cons'
change -> syslog: 'log_crit' ==> 'level = crit'
change -> syslog: 'log_daemon' ==> 'facility = daemon'
change -> syslog: 'log_debug' ==> 'level = debug'
change -> syslog: 'log_emerg' ==> 'level = emerg'
change -> syslog: 'log_err' ==> 'level = err'
change -> syslog: 'log_info' ==> 'level = info'
change -> syslog: 'log_local0' ==> 'facility = local0'
change -> syslog: 'log_local1' ==> 'facility = local1'
change -> syslog: 'log_local2' ==> 'facility = local2'
change -> syslog: 'log_local3' ==> 'facility = local3'
change -> syslog: 'log_local4' ==> 'facility = local4'
change -> syslog: 'log_local5' ==> 'facility = local5'
change -> syslog: 'log_local6' ==> 'facility = local6'
change -> syslog: 'log_local7' ==> 'facility = local7'
change -> syslog: 'log_ndelay' ==> 'options = ndelay'
change -> syslog: 'log_notice' ==> 'level = notice'
change -> syslog: 'log_perror' ==> 'options = perror'
change -> syslog: 'log_pid' ==> 'options = pid'
change -> syslog: 'log_user' ==> 'facility = user'
change -> syslog: 'log_warning' ==> 'level = warning'
change -> threshold: 'ips_option: threshold' ==> 'event_filter'
change -> unified2: 'alert_unified2' ==> 'unified2'
change -> unified2: 'log_unified2' ==> 'unified2'
change -> unified2: 'unified2' ==> 'unified2'
deleted -> arpspoof: 'unicast'
deleted -> attribute_table: '<FRAG_POLICY>hpux</FRAG_POLICY>'
deleted -> attribute_table: '<FRAG_POLICY>irix</FRAG_POLICY>'
deleted -> attribute_table: '<FRAG_POLICY>old-linux</FRAG_POLICY>'
deleted -> attribute_table: '<FRAG_POLICY>unknown</FRAG_POLICY>'
deleted -> attribute_table: '<STREAM_POLICY>noack</STREAM_POLICY>'
deleted -> attribute_table: '<STREAM_POLICY>unknown</STREAM_POLICY>'
deleted -> config 'cs_dir'
deleted -> config 'decode_data_link'
deleted -> config 'disable_attribute_reload_thread'
deleted -> config 'disable_decode_alerts'
deleted -> config 'disable_decode_drops'
deleted -> config 'disable_inline_init_failopen'
deleted -> config 'disable_ipopt_alerts'
deleted -> config 'disable_ipopt_drops'
deleted -> config 'disable_replace'
deleted -> config 'disable_tcpopt_alerts'
deleted -> config 'disable_tcpopt_drops'
deleted -> config 'disable_tcpopt_experimental_alerts'
deleted -> config 'disable_tcpopt_experimental_drops'
deleted -> config 'disable_tcpopt_obsolete_alerts'
deleted -> config 'disable_tcpopt_obsolete_drops'
deleted -> config 'disable_tcpopt_ttcp_alerts'
deleted -> config 'disable_ttcp_alerts'
deleted -> config 'disable_ttcp_drops'
deleted -> config 'dump_dynamic_rules_path'
deleted -> config 'dynamicoutput'
deleted -> config 'enable_decode_drops'
deleted -> config 'enable_decode_oversized_alerts'
deleted -> config 'enable_decode_oversized_drops'
deleted -> config 'enable_gtp'
deleted -> config 'enable_ipopt_drops'
deleted -> config 'enable_mpls_multicast'
deleted -> config 'enable_tcpopt_drops'
deleted -> config 'enable_tcpopt_experimental_drops'
deleted -> config 'enable_tcpopt_obsolete_drops'
deleted -> config 'enable_tcpopt_ttcp_drops'
deleted -> config 'enable_ttcp_drops'
deleted -> config 'flexresp2_attempts'
deleted -> config 'flexresp2_interface'
deleted -> config 'flexresp2_memcap'
deleted -> config 'flexresp2_rows'
deleted -> config 'flowbits_size'
deleted -> config 'include_vlan_in_alerts'
deleted -> config 'interface'
deleted -> config 'layer2resets'
deleted -> config 'log_ipv6_extra_data'
deleted -> config 'no_promisc'
deleted -> config 'nolog'
deleted -> config 'protected_content'
deleted -> config 'sfalert_unified2'
deleted -> config 'sflog_unified2'
deleted -> config 'sidechannel'
deleted -> config 'so_rule_memcap'
deleted -> config 'stateful'
deleted -> csv: '<filename> can no longer be specific'
deleted -> csv: 'default'
deleted -> csv: 'trheader'
deleted -> detection: 'mwm'
deleted -> detection: 'search-optimize is always true'
deleted -> dnp3: 'disabled'
deleted -> dnp3: 'memcap'
deleted -> dns: 'enable_experimental_types'
deleted -> dns: 'enable_obsolete_types'
deleted -> dns: 'enable_rdata_overflow'
deleted -> event_trace: 'file'
deleted -> fast: '<filename> can no longer be specific'
deleted -> frag3_engine: 'detect_anomalies'
deleted -> frag3_global: 'disabled'
deleted -> ftp_telnet_protocol: 'detect_anomalies'
deleted -> full: '<filename> can no longer be specific'
deleted -> http_inspect: 'detect_anomalous_servers'
deleted -> http_inspect: 'disabled'
deleted -> http_inspect: 'fast_blocking'
deleted -> http_inspect: 'normalize_random_nulls_in_text'
deleted -> http_inspect: 'proxy_alert'
deleted -> http_inspect_server: 'allow_proxy_use'
deleted -> http_inspect_server: 'enable_cookie'
deleted -> http_inspect_server: 'enable_xff'
deleted -> http_inspect_server: 'extended_ascii_uri'
deleted -> http_inspect_server: 'extended_response_inspection'
deleted -> http_inspect_server: 'iis_unicode_map not allowed in sever'
deleted -> http_inspect_server: 'inspect_uri_only'
deleted -> http_inspect_server: 'log_hostname'
deleted -> http_inspect_server: 'log_uri'
deleted -> http_inspect_server: 'no_alerts'
deleted -> http_inspect_server: 'no_pipeline_req'
deleted -> http_inspect_server: 'non_strict'
deleted -> http_inspect_server: 'normalize_cookies'
deleted -> http_inspect_server: 'normalize_headers'
deleted -> http_inspect_server: 'small_chunk_length'
deleted -> http_inspect_server: 'tab_uri_delimiter'
deleted -> http_inspect_server: 'unlimited_decompress'
deleted -> imap: 'disabled'
deleted -> imap: 'max_mime_mem'
deleted -> imap: 'memcap'
deleted -> perfmonitor: 'accumulate'
deleted -> perfmonitor: 'atexitonly'
deleted -> perfmonitor: 'atexitonly: base-stats'
deleted -> perfmonitor: 'atexitonly: events-stats'
deleted -> perfmonitor: 'atexitonly: flow-ip-stats'
deleted -> perfmonitor: 'atexitonly: flow-stats'
deleted -> perfmonitor: 'atexitonly: reset'
deleted -> perfmonitor: 'events'
deleted -> perfmonitor: 'max'
deleted -> pop: 'disabled'
deleted -> pop: 'max_mime_mem'
deleted -> pop: 'memcap'
deleted -> ppm: 'debug-pkts'
deleted -> reputation: 'shared_max_instances'
deleted -> reputation: 'shared_refresh'
deleted -> rpc_decode: 'alert_fragments'
deleted -> rpc_decode: 'no_alert_incomplete'
deleted -> rpc_decode: 'no_alert_large_fragments'
deleted -> rpc_decode: 'no_alert_multiple_requests'
deleted -> rule_state: 'action'
deleted -> rule_state: 'enable'
deleted -> sfportscan: 'detect_ack_scans'
deleted -> sfportscan: 'disabled'
deleted -> sfportscan: 'logfile'
deleted -> sfportscan: 'sense_level'
deleted -> sip: 'disabled'
deleted -> sip: 'max_sessions'
deleted -> smtp: 'alert_unknown_cmds'
deleted -> smtp: 'disabled'
deleted -> smtp: 'enable_mime_decoding'
deleted -> smtp: 'inspection_type'
deleted -> smtp: 'max_mime_depth'
deleted -> smtp: 'max_mime_mem'
deleted -> smtp: 'memcap'
deleted -> smtp: 'no_alerts'
deleted -> smtp: 'print_cmds'
deleted -> ssh: 'autodetect'
deleted -> ssh: 'enable_badmsgdir'
deleted -> ssh: 'enable_paysize'
deleted -> ssh: 'enable_protomismatch'
deleted -> ssh: 'enable_recognition'
deleted -> ssh: 'enable_respoverflow'
deleted -> ssh: 'enable_srvoverflow'
deleted -> ssh: 'enable_ssh1crc32'
deleted -> ssl: 'noinspect_encrypted'
deleted -> stream5_global: 'disabled'
deleted -> stream5_global: 'flush_on_alert'
deleted -> stream5_global: 'memcap'
deleted -> stream5_global: 'no_midstream_drop_alerts'
deleted -> stream5_tcp: 'check_session_hijacking'
deleted -> stream5_tcp: 'detect_anomalies'
deleted -> stream5_tcp: 'dont_store_large_packets'
deleted -> stream5_tcp: 'ignore_any_rules'
deleted -> stream5_tcp: 'log_asymmetric_traffic'
deleted -> stream5_tcp: 'policy noack'
deleted -> stream5_tcp: 'policy unknown'
deleted -> stream5_tcp: 'use_static_footprint_sizes'
deleted -> stream5_udp: 'ignore_any_rules'
deleted -> tcpdump: '<filename> can no longer be specific'
deleted -> test: 'file'
deleted -> test: 'stdout'
deleted -> unified2: 'filename'
deleted -> unified2: 'mpls_event_types'
deleted -> unified2: 'vlan_event_types'

