We recently performed a yum update on the RHEL7 box, and much to our dismay, the ability to open the port now fails.
There are two scripts we have to run in order to open the port:
This one runs:
sudo iptables -A INPUT -p tcp --dport 1234 -j ACCEPT
This one fails:
sudo iptables -A IN_public_allow -p tcp -m tcp --dport 1234 -m conntrack --ctstate NEW -j ACCEPT
Gives the following error:
iptables: No chain/target/match by that name.
This always worked for years, now that latest update won't allow this to run
Any help would be greatly appreciated.