Re: nfconntrack and asymmetric routing

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On Wednesday 2008-04-23 10:54, Marco Berizzi wrote:
>
>Unfortunately I have a linux firewall
>which see half of packets because of a
>bad designed network.
>nfconntrack table is full of these entries:
>
>ipv4     2 tcp      6 431303 ESTABLISHED src=172.23.1.21 dst=82.9.69.137
>sport=25 dport=4036 packets=2 bytes=256 [UNREPLIED] src=82.9.69.137
>dst=172.23.1.21 sport=4036 dport=25 packets=0 bytes=0 mark=0 use=1
>
>because netfilter never see the fin/rst
>tcp packets.
>They never expires and sometimes linux
>logs these messages:
>
>nf_conntrack: table full, dropping packet
>
>Is there a way to tell netfilter to delete
>these entries?

Would not it be better to disable connection tracking for
the asymmetrically routed packets?
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