firewalliptablesrhelnagiosnrpe

Firewall error in RHEL 7.2: "No chain/target/match by that name."

I am trying to configure NRPE 3.2.0 and it uses the port 5666 to run remote scripts.

When I try to execute the command below, i get this error.

firewall-cmd --zone=public --add-port=5666/tcp

Error: COMMAND_FAILED: '/sbin/iptables -w2 -A IN_public_allow -t filter -m tcp -p tcp --dport 5666 -m conntrack --ctstate NEW -j ACCEPT' failed: iptables: No chain/target/match by that name.
Failed to apply rules. A firewall reload might solve the issue if the firewall has been modified using ip*tables or ebtables.

I understand that the chain I am trying to append does not exist, but I don't have a clue about what this chain is or how to create it.

Solution

  • Reload the firewall with: firewall-cmd --reload.