Re: connection tracking and kernel dropping packets

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On 6. novembra 2024 17:44:50 UTC, Matt Zagrabelny <mzagrabe@xxxxxxxxx> wrote:

>I've waited a week to let the TCP streams in the conntrack table time
>out. I'm still seeing the kernel drop packets:

># cat /proc/sys/net/ipv4/netfilter/ip_conntrack_count
>65536

># conntrack -L > /dev/null
>conntrack v1.2.1 (conntrack-tools): 22 flow entries have been shown.

Your system seems to be broken, you can have zombie connections or
you meet same (old) bug.

Try to reboot it, with a little of luck it will solve that (i roughly remember
some problems, in old kernels, after conntrack become full, but i am not
sure), othervise you can start to track it from zero and try to find source.

Perhaps unload/load the conntrack module will help too...

BTW, you can show conntracks count by:

    conntrack -C

You can test which number it display, mine matches...

regards


-- 
Slavko
https://www.slavino.sk/





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