Re: interface based conntrack entry

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Jan Engelhardt <jengelh@xxxxxxxxxxxxxxx> writes:

> I believe that nf_conntrack deliberately does not use interfaces
> as tuple parts because packets may very well come in on
> and/or leave on different interfaces (routing on fwmark).

As a reminder, this makes it very important that Linux firewalls have
rp_filter set to true -- or that they drop packets coming in on the
"wrong" interface BEFORE the customary -A FORWARD -m state --state
RELATED,ESTABLISHED -j ACCEPT


/Benny


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