[CentOS] DNS or firewall problem

Mon Jul 5 23:00:02 UTC 2010
Thomas Dukes <tdukes at sc.rr.com>

Been working this for over a month now and I'm stumped.

Everything was working until the 'crash'. Backup was no good so I did a
fresh install of centos 5.5. Trying to get things back like they were but
its been a really long time since I had to set things up from scratch,
Redhat 2.0.

My centos server acts as a gateway/firewall/router for my home network.
Internal machines can access the internet. The server can access the
internet. I can access my server/services from outside the local network but
internal machines cannot.

Any ideas/suggestions?