Topic: Network goes down

[Joel Koop]

I just installed e-smith 5.5 as a gateway for a company I work for.  It's working great, except once or twice a day the external network fails.  When it does, I can't ping the computer from the outside, and I can't ping any computer on the internet from the e-smith server.  I have tried restarting the network with

/etc/rc.d/init.d/network restart

I have also tried restarting named, ipchains, squid, etc. The external network will not come back up until I restart the server.

I can't find any relevant info in the log files, except that suddenly, nothing can get a connection (dns lookups fail)

I have tried two different ethernet cards, and that doesn't seem to change anything. I have cable internet, and if I connect with another computer directly to the modem, the internet works fine, so that's not the problem.

Any ideas why it would go down?

Thanks. Joel

[Des Dougan]

"/etc/rc.d/init.d/network restart" basically does the same thing as a server restart would do. What makes you think the problem is with the server rather than the ISP?

Do you have a standard configuration, or have you made any mods?

What output do you get when you run the "/etc/rc.d/init.d/network restart" command?

[Joel Koop]

I think it's the server because bypassing the server and connecting directly to the internet works on another computer.

No mods, just the updates.

Network restart said everything was OK, but the internet test still failed. Logs show  ( but only in one instance ) :

network: Setting network parameters:  succeeded
network: Bringing up interface lo:  succeeded
network: Bringing up interface eth0:  succeeded
ifup: SIOCSIFFLAGS: No such device
ifup: SIOCADDRT: Network is down
ifup: SIOCADDRT: Network is unreachable
network: Bringing up interface eth1:  succeeded

Going to try a different network card tomorrow.

[Jay Rentmeester]

Apply the latest service pack. That fixed the same problem for me.

Jay Rentmeester