Yup i am, IPtables, but i tried disabling it and the timeout occurs anyway.
When sharing files everything is fine, i can copy to and from NFS partition and modify files on it, the timeout happens only when i play .mp3s from the NFS partition on the remote machine. XMMS stops playing at random times and on both machines (client and server) /var/log/messages spits out the RPC timeout on eth0 blah, blah. Then i use ifconfig to put down and back up eth0 interfaces and everything continues working. So this timeout only occurs when the client is continuosly using the NFS partition, like in the example i gave when i'm playing .mp3s from NFS.
It might be the Ethernet cord... But im too lazy to go buy another one, and then i can play mp3s on the server so its not a big issue at all since NFS otherwise works well...
Was that confusing?
Sorry but when i start speaking its often hard to shut me up before i finish what i was to say
sorry again if this too long..