[LINUX] Network Lock and firewalld

[Staff 10142]

Hello!

Starting from version 2.3, firewalld by default owns exclusively nftables tables generated by itself, thus preventing Eddie, Bluetit and Hummingbird Network Lock related operations. If you want to have Network Lock enabled and firewalld running at the same time, then you must configure firewalld by setting the following option:

NftablesTableOwner=no 

in firewalld's configuration file, usually /etc/firewalld/firewalld.conf .

After you have edited the configuration file with any text editor with root privileges, reload firewalld configuration or restart firewalld, and only then (re)start Bluetit, Hummingbird or Eddie. Additional insights:
https://discussion.fedoraproject.org/t/firewalld-add-flags-owner-persist-in-fedora-42/148835
https://forums.rockylinux.org/t/rocky-9-5-breaks-netfilter/16551

Kind regards