Messenger problem

August 5th, 2005 · No Comments · Linux

Sometimes, eventhough we can browse the web, we are not able to use any chat clients/messengers like yahoo and msn. This can happen for any of the following reasons:

–> DNS Server is not working on the proxy server (service named start should fix it)

–> IPTables is restricting that port… make sure that the port is open. There should be a line like

-A POSTROUTING -o eth1 -p tcp -m tcp –dport 5050 -j MASQUERADE

in the file /etc/sysconfig/iptables in super user mode. After adding the appropriate line, restart the iptables service using ’service iptables restart’ command.

–> Forwarding may not have been enabled. The file /proc/sys/net/ipv4/ip_forward should contain “1″. So do a

echo “1″ > /proc/sys/net/ipv4/ip_forward

*collected from net

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