Not masquerading loopback is broken about firewalld HOT 3 CLOSED

After changing the setting in fw_zone.py, the output is as expected:

Ncat: Listening on :::5000
Ncat: Listening on 0.0.0.0:5000
Ncat: Connection from 127.0.0.1.
Ncat: Connection from 127.0.0.1:54530.
foobar

Should I write a pull request for that?

from firewalld.

http://www.netfilter.org/documentation/HOWTO//NAT-HOWTO-5.html#ss5.1 contains an explanation:

You can specify the incoming (-i' or--in-interface') or outgoing (-o' or--out-interface') interface to match, but which you can specify depends on which chain you are putting the rule into: at PREROUTING you can only select incoming interface, and at POSTROUTING you can only select outgoing interface. If you use the wrong one, iptables will give an error.

from firewalld.

Thanks for finding this. Here is the fix:
t-woerner@6acdfa3

from firewalld.