[Bug 988] manpage: mention that REJECT should be used with care

bugzilla-daemon at netfilter.org bugzilla-daemon at netfilter.org
Tue Dec 2 16:39:17 CET 2014


Pablo Neira Ayuso <pablo at netfilter.org> changed:

           What    |Removed                     |Added
             Status|NEW                         |RESOLVED
                 CC|                            |pablo at netfilter.org
         Resolution|---                         |WONTFIX

--- Comment #1 from Pablo Neira Ayuso <pablo at netfilter.org> ---
(In reply to Denys Vlasenko from comment #0)
> I've got a user report. They are using the following set of rules:
> -m state --state ESTABLISHED,RELATED -j ACCEPT
> -m state --state NEW -m tcp -p tcp --dport 21 -j ACCEPT
> ...<more open port snipped>...
> -j REJECT --reject-with icmp-host-prohibited

People have to handle the INVALID state, which is the one that those invalid
checksum packets are reaching.

I mean, there are four ct states, and it's a good practise if your ruleset
handles them all.

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