NAME

afick - Another File Integrity Checker

DESCRIPTION

The goal of this program is to monitor what change on your host : new/deleted/modified files. So it can be used as an intrusion detection system ( by integrity checking ). It is designed to be a portable clone of aide (Advanced Intrusion Detection Environment), or Tripwire software.

You should launch it regularly (by cron for example) and after any software change.

This is a command-line program, you can use afick-tk.pl if you prefer a graphical interface.

SYNOPSIS

afick [action] [options]

afick use posix syntax, which allow many possibilities :

long (--) options
short (-) options
negative (--no) options

Mandatory action (one and only one must be used) :

 -i|--init                    initialize the hash.dbm database
 -C|--check_config            only check config file and exit
 -G|--clean_config            check and clean configuration, then exit
 -U|--check_update            check if a software update is available
 -k|--compare                 compare the hash.dbm database
 -l|--list fic1 .. fic2       check the files given in arg 
 -u|--update                  compare and update the hash.dbm database
 -p|--print                   print content of database
 --search filter              print content of database, filtered (see man of html doc for exemples)
 --print_config               display all internals variables after arguments and config file parsing.
                              it is the same as the 4 followings options, concatenated
                                (for debugging purposes)
 --print_directive            display directives (after config file and command line parsing)
 --print_macro                display macros (after config file parsing)
 --print_alias                display aliases (after config file parsing)
 --print_rule                 display rules (after config file parsing)
 --stat_secu                  display from databases some dangerous files (suid, sgid, group writable, world writable )
 --stat_size                  display from databases statistics on file size

Other options

 -a|--ignore_case             helpful on Windows platforms, dangerous on Unix ones
                                reverse : --noignore_case
 -c|--config_file file        name of config file to use
 -D| --database file          force the database name    
 -d|--debug level             set a level of debugging messages, from 0 (none) to 4 (full)
 -f|--full_newdel             report full information for new or deleted directories
                               reverse : --nofull_newdel 
 -m|--missing_files           warn about files declared in config files 
                               which do not exists, 
                               reverse : --nomissing_files
 -o|--allow_overload          allow rule overload : the last rule wins
                               reverse: --noallow_overload
 -r|--running_files           warn about "running" files : modified since program begin
                               reverse: --norunning_files
 -s|--dead_symlinks           warn about dead symlinks 
                               reverse: --nodead_symlinks
 -Y|--follow_symlinks         checksum on links target file (yes) or checksum on target name (no)
                               reverse: --nofollow_symlinks
 -S|--max_checksum_size size  maximum cheksum size (bytes) : for bigger file, just compute checksum on begin of file
                                0 means no limit
 -t|--timing                  Print timing statistics
                                reverse : --notiming
 -v|--verbose                 toggle verbose mode (identical to full debug);
                               reverse : --noverbose
 -P|--progress                display the name of scanned files, to be used only by afick-tk
 -h|--help                    show this help page
 --man                        full help
 -V|--version                 show afick version
 -x|--exclude_suffix ext1 ext2        list of file/dir suffixes to ignore
 -X|--exclude_prefix pre1 pre2        list of files/dir prefixes to ignore
 -R|--exclude_re patern1 patern2      list of files/dir patterns (regular expressions) to ignore
 -y|--history file            history file of all runs with summary
 -A|--archive directory       directory where archive files are stored
 --report_url output          where to send afick report.default is stdout
 --report_syslog              send afick report to sylog. reverser : --noreport_syslog

ACTIONS

You have to use one this mandatory action :

--init|-i: initiate the database.
--check_config|-C: only check config file syntax and exit with the number of errors
--check_update|-U: check if a new software version is available on web server
--clean_config|-G: check config file syntax, clean (comments) bad line, and exit with the number of errors
--compare|-k: compare the file system with the database.
--list|-l ``file1 file2 ... filen'': compare the specified files with the database.
--print|-p: print the content of the database.
--search your_filter: print the content of the database, filtered by your_filter filter.; filters are to be written with column keywords and perl operators, and should be quoted; keywords are : filetype, name, md5, sha1, checksum, device, inode, filemode, links, uid, acl, gid, filesize, blocs, atime, mtime, ctime; for examples :; ``filetype =~ m/symbolic/'' : filter on file type; ``filesize < 5000000'' : filter on file size; ``filemode & 04000'' : extract suid files; ``(filesize > 5000) and (name =~ m/urpmi/)'' : you can combine filters
--print_config: display all internals variables after command line and config file parsing (for debugging purposes). It is the same as the 4 following options : --print_directive --print_macro --print_alias --print_rule
--print_directive: display directives (after config file and command line parsing)
--print_macro: display macros (after config file parsing)
--print_alias: display aliases (after config file parsing)
--print_rule: display rules (after config file parsing)
--update|-u: compare and update the database.
--stat_secu: display from databases some dangerous files (suid, sgid, group writable, world writable )
--stat_size: display from databases statistics on file size; can help to configure the max_checksum_size option

OPTIONS

You can use any number of the following options :

--archive|-A directory: write reports to ``directory''.
--config_file|-c configfile: read the configuration in config file named ``configfile''.
--database|-D name: name of database to use.
--debug|-d level: set a level of debugging messages, from 0 (none) to 4 (full)
--full_newdel|-f,(--nofull_newdel): (do not) report full information on new and deleted directories.
--help|-h: Output summary help information and exit.
--man: Output full help information and exit.
--history|-y historyfile: write session status to history file
--ignore_case|-a: ignore case for file names. Can be helpful on Windows operating systems, but is dangerous on Unix ones.
--max_checksum_size|-S size: fix a maximum size (bytes) for checksum. on bigger files, compute checksum only on first 'size' bytes. ( 0 means no limit)
--missing_files|-m,(--nomissing_files): (do not) warn about files declared in config files which does not exists.
--dead_symlinks|-s,(--nodead_symlinks): (do not) warn about dead symlinks.
--follow_symlinks,(--nofollow_symlinks): if set, do checksum on target file, else do checksum on target file name.
--allow_overload,(--noallow_overload): if set, allow rule overload (the last rule wins), else put a warning and keep the first rule.
--progress|-P: display the name of scanned files, to be used only by afick-tk
--running_files|-r,(--norunning_files): (do not) warn about ``running'' files : modified since program begin.
--timing|-t,(--notiming): (do not) Print timing statistics.
--version|-V: Output version information and exit.
--verbose|-v,(--noverbose): (not in) verbose mode (obsolete).
--exclude_suffix|-x ``ext1 ext2 ... extn'': list of suffixes (files/directories ending in .ext1 or .ext2 ...) to ignore
--exclude_prefix|-X ``pre1 pre2 ... pren'': list of prefix (files/directories beginning with pre1 or pre2 ...) to ignore
--exclude_re|-R ``pre1 pre2 ... pren'': list of patterns (regular expressions) to ignore files or directories
--report_url output: output can stdout, stderr or null (which mean no output)
--report_syslog (--noreport_syslog): send (or not) afick's report to syslog. the priority is 'notice' for info messages, 'warning' for warning messages. The facility is 'user'

FILES

if no config file on command line, afick try to open /etc/afick.conf (Unix) or windows.conf (Windows) as default config

for config file syntax see afick.conf(5)

afick uses a ``control file'' too. It has the name of the database, with '.ctr' suffix.

DATABASE

until release 2.9, the database backend was SDBM, because it was the only one available on every operating system.

Coming with 2.10 release, afick can use other database backend : the 'best' available one will be detected on init. There is no way to migrate an existing SDBM base to a new format. The only way is to re-run afick in init mode (caution : changes since last update will be ``lost'')

USE

To use this program, you must

first adjust the config file to your needs : see afick.conf(5) for the syntax)

then initiate the database with : afick -c afick.conf --init

then you can compare with afick -c afick.conf -k

or compare and update with afick -c afick.conf --update

ENVIRONMENT

The default config file can be set with AFICK_CONFIG environment variable.

RETURN VALUES

An exit status of 0 means no differences were found, and no dangling links (if the warn_dead_symlinks option is set) , non-zero means some differences were found or some dangling links. The non-zero value is a bitmap representing the type of difference found:

Bit 0 ( value : 1): Dangling
Bit 1 (value : 2): Changed
Bit 2 (value : 4): Deleted
Bit 3 (value : 8): New

SECURITY

For a better security, afick not only check the rules from configuration file, but try to check it-self : perl scripts, configuration file, database, and warn if something change.

NOTES

this program only use perl and its standard modules.

COPYRIGHT

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

AUTHOR

Eric Gerbier

you can report any bug or suggest to gerbier@users.sourceforge.net

afick - Another File Integrity Checker