TCP time_wait and port exhaustion for servers

Jon Lewis jlewis at lewis.org
Thu Dec 6 01:44:43 UTC 2012


On Wed, 5 Dec 2012, Cyril Bouthors wrote:

> On  5 Dec 2012, rps at maine.edu wrote:
>
>> Where there is no way to change this though /proc
>
> 10:17PM lenovo:~% sudo sysctl -a |grep wait
> net.netfilter.nf_conntrack_tcp_timeout_fin_wait = 120
> net.netfilter.nf_conntrack_tcp_timeout_close_wait = 60
> net.netfilter.nf_conntrack_tcp_timeout_time_wait = 120
> net.ipv4.netfilter.ip_conntrack_tcp_timeout_fin_wait = 120
> net.ipv4.netfilter.ip_conntrack_tcp_timeout_close_wait = 60
> net.ipv4.netfilter.ip_conntrack_tcp_timeout_time_wait = 120

Those netfilter connection tracking tunables have nothing to do with the 
kernel's TCP socket handling.

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