# Changes in Varnish 6.1

This release is a maintenance release, so while there are many actual changes, and of course many bugfixes, they should not have little to no impact on running Varnish installations.

## Nothing to see here, really

Since new users often forget to vcl.discard their old VCLs, we have added a warning when you have more than 100 VCLs loaded. There are parameters to set the threshold and decide what happens when it is exceeded (ignore/warn/error).

We have made req.http.Host mandatory and handle requests without it on the fast DoS avoidance path.

For all the details and new stuff, see Upgrading to Varnish 6.1

eof