On Wed, Oct 22, 2008 at 9:29 PM, Ron Johnson <[EMAIL PROTECTED]> wrote:
> On 10/22/08 14:23, Kamaraju S Kusumanchi wrote:
>
>> I often use ssh to access other computers at school. However, I can't make
>> these connections persistent. If there is no activity (say in 20 minutes),
>> the ssh connection just freezes up. As a result, I have to kill all the
>> gvim, xterm windows opened from that terminal. This is very annoying if I
>> am coding something.
>>
>> Is it possible to make ssh connections which do not freeze even if there
>> is
>> no activity for a while?
>>
>
> That sounds like a security feature configured on the host side.
This is usually caused by a PAT router/firewall en route that times out and
closes the connection when it doesn't see any packets for a while. The trick
is to do like Tyler suggested or something similar, to cause ssh or tcp to
send keepalive packets regularly over this tcp connection. Other more low
level options are /proc/sys/net/ipv4/tcp_keepalive_{intvl,probes,time}.
Ketil Froyn
[EMAIL PROTECTED]
http://ketil.froyn.name/
