upgraded to redhat 7.0

[sdunn]

I was running rc.firewall for IP masquerading on redhat 6.2. Everything was working fine. Friday I upgraded to Redhat 7.0 now the IP masquerading does not seem to work. Is anyone familiar with the rc.firewall I got this info from redhat.com. I am also running sendmail. I can surf from the networked windows machines but I cannot ping any addresses? Any help will be appreciated if I need to clarify more just ask!!!!
thanks