The new userland interface in RHEL7, Firewalld, when enabled, will block network communication of Notes and Domino.
The TN 1683423 show how to enable communications using firewall or disabling the firewall.
To disable:
Disable the firewall with the command: “systemctl stop firewalld” and “systemctl disable firewalld”.
To query the firewall status, issue the command: “systemctl status firewalld”
