Question : Having issues with DNS after Domain Controller decommission

yesterday we decommissioned one of our domain controllers, we moved all the roles off of the server and did the dcpromo to uninstall active directory. This also uninstalled DNS on this server. The issues we are seeing is mail from an external source stopped working, the dns name that we used for our proxy stopped working. It kept prompting for user credentials every time you goto a website. The interesting part about the proxy is if you changed it to the IP address it worked fine. So far we have troubleshooted DNS with no luck. Everything comes back as passed and all the nslookups come back fine. Anyone have any other ideas what we can look at. Thanks

Answer : Having issues with DNS after Domain Controller decommission

The command:
iptables -A INPUT ....
adds a rule in the current ruleset and is visible in:
iptables -L

However it is not added automatically to etc/sysconfig/iptables and it is not persistent over reboots (restarts of iptables)

Edit the file etc/sysconfig/iptables directly and restart iptables or add the rule with "iptables -A INPUT ...." and save the rules to etc/sysconfig/iptables with "iptables-save"

INPUT is the linux built in chain for packets arriving to the machine.
rh-firewall-1-input iptables is a custom chain created by RedHat linux distributions and this chain usually receives redirects from built in INPUT and FORWARD chains.