Hi,

I have configured a Linux (fedora 11) server with Squid proxy and iptables based firewall.(it is normal proxy not a transperant one)
I have also enabled caching in the server.natting is enabled with
iptables -t nat -A POSTROUTING -o eth0 -j SNAT --to-source 203.200.160.78
command.
ip_forwarding is also enabled.
the internal IP is given full access to the pool of 192.168.1.0/24.

I am facing a peculiar problem in the sense that browsing is working after 15 mins or so the browsing is stopping. After that if I am restarting the network services the browsing is again getting enabled.

The cache log is showing as the interface eth0 is destination unreachable.

Please urgently help me.


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Check the mtu value on the cards and lower them to 1452 or try out several values in steps of 8. Default is usually 1492.

Add "mtu xxxx" to the configuration file of your network devices.

Is there anything in /var/log/messages ?

Hi,

I am not being able to find this option can u please tell me where & how to cjange this MTU option.

Saugato.