Today I removed the firewall ui from cockpit.
It disabled shorewall (which was my goal ), but it also removed nethserver-firewall-base. The network became unstable. Shares not accessible, docker containers unable to communicate.
I was lucky to find this forum post. The firewall application delete command in cockpit may need some attention.
Jan 02 20:25:03 Erased: nethserver-firewall-base-ui-3.13.1-1.ns7.noarch
Jan 02 20:25:03 Erased: nethserver-firewall-base-3.13.1-1.ns7.noarch
Jan 02 21:18:58 Installed: nethserver-firewall-base-3.13.1-1.ns7.noarch
Nethserver V7.9.2009, server only (no use of red interfaces (what used to be gateway mode ).