Greetings. In a previous version of Fedora I had iptables rules of the
form:

-A INPUT -p tcp --destination-port 25 -m mac --mac-source \
AA:BB:CC:DD:EE:FF -j ACCEPT

in order to accept email only from selected local systems.

I've just installed Fedora 20, and I'm trying to implement the same kind of
thing using:

firewall-cmd

but I've been unable to figure out how to do this. Any thoughts?

Thanks,

-- Mike