From: Athan <netfilter@miggy.org>
To: netfilter@lists.netfilter.org
Subject: Re: HELP: Conntrack table filling up !!!
Date: Tue, 31 Dec 2002 23:50:05 +0000 [thread overview]
Message-ID: <20021231235005.GD1985@miggy.org> (raw)
In-Reply-To: <000001c2b10e$e13376a0$0100a8c0@zultys.com>
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On Tue, Dec 31, 2002 at 12:54:57PM -0800, Ranjeet Shetye wrote:
>
> There are ways in which pings (ICMP packets) can fill up conntrack
> tables quickly. Are you running into problems with ICMP traffic only or
> with any traffic ? e.g. look at /proc/net/ip_conntrack . Is it filled up
> with ICMP traffic connections only ? If so, you might want to protect
> your linux box from malformed ICMP packets, by DROPping all such packets
> in the "filter" table.
Don't arbitrarily drop all ICMP, bad idea, breaks a few things.
Couldn't the 'full ip conntrack table' problem be solved by echo'ing a
bigger number into /proc/sys/net/ipv4/ip_conntrack_max ?
root@jimblewix:/proc/sys/net/ipv4;
23:48:19 0$ echo 32768 > ip_conntrack_max
certainly changes it here.
-Ath
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next prev parent reply other threads:[~2002-12-31 23:50 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-12-23 19:00 HELP: Conntrack table filling up !!! Mircea Ciocan
2002-12-31 20:54 ` Ranjeet Shetye
2002-12-31 23:50 ` Athan [this message]
2003-01-02 19:33 ` Ranjeet Shetye
2003-01-02 20:35 ` Athan
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