You were correct. I thought I had set up a static route from the modem to the router (but I guess not) so I never bothered to check. Duh, IP address of router had changed after a power outage, that I was un aware of, caused a reboot.TrevorH wrote: If it doesn't then the problem is between you and the remote side of the firewall - either something is blocking the packets so they never reach your router/firewall or your forwarding is not working. If you do see packets arriving then the problem is on the CentOS box.
Thanks for your help.