Hi, my ip_conntrack table is filling up and now my server is dropping
packets. I'm running CentOS release 4.4 (Final) on a fairly busy
webserver.  The table is full of various connections, including a lot
of "ESTABLISHED" tcp connections from my webserver (the src is my
webserver ip), and some other random connections to my webserver, and
many "ASSURED" connections.  So why is it filling up? I changed the
default timeout value like so:

echo 36000 > /proc/sys/net/ipv4/netfilter/ip_conntrack_tcp_timeout_established

but I don't think that's had any effect. any thoughts? what additional
info can I provide that would be helpful?    I did find a script that
clears out some of the stale connections using hping2, but I don't
know if that's really a great solution to this problem.