When firewalld is active, aphlict on equatower.nasqueron.org can't be reached by the devcentral container.

This issue is fixed by a rich rule in public zone allowing connections from containers networks.

For example, this block appended to the zone works fine:

[…]
<zone>
  […]
  <rule family="ipv4">
    <source address="172.16.0.0/12" />
    <accept />
  </rule>
</zone>