On Thu, Jun 07, 2018 at 04:38:16PM -0500, Michael Crider - HOEC wrote:
I am trying to recreate an existing firewall configuration created in
Firewall Builder using Firewalld. It runs on a router that controls traffic
in and out of our company network. The existing configuration has rules that
permit traffic to be relayed out on specified ports for specified addresses
on the internal network. For example: a list of addresses are allowed to get
out on ports 80 and 443 for http and https traffic, any other internal
machines are denied. I currently have the external interface in the external
zone, and the internal interface in the public zone, with the following
configuration:
external (active)
target: DROP
icmp-block-inversion: no
interfaces: ens2f1
sources:
services:
ports:
protocols:
masquerade: yes
forward-ports:
source-ports:
icmp-blocks:
rich rules:
public (active)
target: %%REJECT%%
icmp-block-inversion: no
interfaces: ens2f0
sources:
services:
ports:
protocols:
masquerade: no
forward-ports:
source-ports:
icmp-blocks:
rich rules:
I have found examples of direct interface rules for allowing traffic out,
but is there any other way (rich rule or something else I'm overlooking) to
unblock traffic like the log excerpt below? As far as I can tell a rich rule
with an element of service and an action of accept only allows traffic to
the router, not passing through the router.
No. Currently, firewalld is more of an end-station firewall. There are
RFEs to implement OUTPUT [0] and FORWARD [1] filtering. I suspect these will
be implemented via rich rules.
Right now the only option is to use direct rules.
[0] https://github.com/firewalld/firewalld/issues/32
[1] https://github.com/firewalld/firewalld/issues/2
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