Tony Ellis wrote:

By the way - there is a kmod driver for forcedeth available for ClearOS 7.4 if that is the reason for not installing 7.4...

I did find this thread on that but the thread also warned that updates could mean it needs to be reinstalled, so I didn't follow it up. This machine is the firewall/gateway for the whole house (1 university professor, 1 uni student and my own computer repair business) and the ear-bashing I got when it went down last week put me off doing anything too complex in case it causes more problems.