Hello list,

I recently stumbled across a strange behaviour of IPFire 2.x, which
seems to be quite critical in my eyes, but I am not sure whether it is
intentional or not.

Default settings of IPFire allow traffic from internal networks
(GREEN, BLUE, ORANGE) to the internet (RED), as documented here:
https://wiki.ipfire.org/configuration/firewall/default-policy

For several reasons, no direct internet access is desired on most
firewall installations I administer, so setting the "default firewall
behaviour" to DROP for both FORWARD and OUTGOING usually is one of
the first steps after installation.

Speaking about GREEN and BLUE, this seems to work: No direct connection
is possible except it has been explicitly allowed.

It turns out this setting does not apply to traffic from ORANGE: Even
default is set to DROP, and no firewall rules allowing anything are
in place, a server located in DMZ is able to reach full internet -
every port on every IP in every country.

This is not my expectation of "default policy" = DROP after all!

Could somebody of the core developers urgently have a look at this, please?

Thanks, and best regards,
Peter Müller
-- 
Microsoft DNS service terminates abnormally when it recieves a response
to a DNS query that was never made.  Fix Information: Run your DNS
service on a different platform.
		-- bugtraq