On Fri, Jan 4, 2013 at 11:01 AM, Tim Evans <tkevans at tkevans.com> wrote: > I'm replacing an ancient Solaris 'ipf' firewall/router with a brand new > CentOS 6.3 system. In the olden days, I successfully used the attached > iptables script (as /etc/rc.local) on Red Hat 5.x systems, but this doesn't > seem to be quite working on the new system. > > Specifically, while it seems to be routing ok, you cannot connect to > anything on the inside net (e.g., with ssh or a browser) and cannot connect > to the system with ssh or anything else from elsewhere on the inside net. > Yet arp shows this system active. > > Is there obsolete stuff here, and/or anything missing that would cause this? You found the error, but I have a question about running this in rc.local. Aren't you opening a very short time security hole by running this from rc.local? Service network starts up early in the startup sequence (/etc/rc.d/rc3.d/S10network), and rc.local is at the very end. Wouldn't it be better to run the iptables rules once, then do: service iptables save This way, iptables rules would be in place (S08iptables) before netowrk startup. -- Dale Dellutri