zuul-jobs/roles/clear-firewall/README.rst

Clear firewall rules from test nodes

Some test workloads manage all of their own firewall rules, and pre-existing firewall rules can pollute the system. This role clears out firewall rules for both ipv4 and ipv6.

You may want to consult your Zuul system's system administrator prior to using this role as the preexisting firewall configuration may provide necessary functionality.