Are you running IPchains or IPtables on the server?

If so, make sure you open up both ports 67 and 68, for both TCP and UDP, 
on the interface you are using for the internal network.

On Tue, 11 Jun 2002, Toralf Lund wrote:

> One of our Red Hat 7.2 workstations fail to start networking when it is 
> configured to boot via DHCP; dhcpcd will exit with the message "timed out 
> waiting for a valid DHCP server response." The server does appear to 
> respond, however, as messages of the form
> 
> dhcpd: DHCPDISCOVER from <MAC address> via eth0
> dhcpd: DHCPOFFER on <IP adrress> to <MAC address> via eth0
> 
> are written to the system log during client starup.
> 
> The (client) network hardware etc. appears to work fine, as the network 
> runs without any problem when the host is set up with a static 
> configuration. Also, this machine has exactly the same network 
> configuration (and also the same type of Ethernet card) as others were 
> dynamic network setup works just fine, as far as I can tell.
> 
> Any ideas what might be wrong?
> 



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