can't get firewalld/nftables/libvirt to masquerade from bridge to public
Hi,
I have a remote server with one network interface, which has a public IP address (enp5s0).
this is a rhel 9
I've created an isolated network as follows:
<network>
<name>LAN-bridge</name>
<uuid>64XXXXXXXXXXXXXXXXXXXXXXXX</uuid>
<bridge name="lanbrdige" stp="on" delay="0"/>
<mac address="52:54:00:XX:XX:XX"/>
<domain name="LAN-bridge"/>
<ip address="192.168.200.1" netmask="255.255.255.0">
<dhcp>
<range start="192.168.200.128" end="192.168.200.254"/>
</dhcp>
</ip>
</network>
I've also created a routed network as follows:
<network>
<name>WAN-bridge-zoned</name>
<uuid>521XXXXXXXXXXXXXXXXXXXXXXXXXX</uuid>
<forward dev="enp5s0" mode="route">
<interface dev="enp5s0"/>
</forward>
<bridge name="wanbridge-zoned" stp="on" delay="0" zone="libvirt-public"/>
<mac address="52:54:00:c0:ac:22"/>
<domain name="WAN-bridge-zoned"/>
<ip address="192.168.10.1" netmask="255.255.255.0">
</ip>
</network>
and the custom zone libvirt-public has been created as follows:
<?xml version="1.0" encoding="utf-8"?>
<zone target="ACCEPT">
<short>libvirt-public</short>
<description> custom libvirt-public zone </description>
<service name="dhcp"/>
<service name="dns"/>
<service name="ssh"/>
<service name="tftp"/>
<protocol value="icmp"/>
<protocol value="tcp"/>
<protocol value="udp"/>
<rule priority="32767">
<reject/>
</rule>
<forward/>
resulting in:
firewall-cmd --zone=libvirt-public --list-all
libvirt-public (active)
target: ACCEPT
icmp-block-inversion: no
interfaces: wanbridge-zoned
sources:
services: dhcp dns ssh tftp
ports:
protocols: icmp tcp udp
forward: yes
masquerade: no
forward-ports:
source-ports:
icmp-blocks:
rich rules:
rule priority="32767" reject
a custom policy has been created to enable zone-to-zone traffic with:
firewall-cmd --new-policy wanbrg_to_public --permanent
firewall-cmd --permanent --policy wanbrg_to_public --add-ingress-zone libvirt-public
firewall-cmd --permanent --policy wanbrg_to_public --add-egress-zone public
firewall-cmd --permanent --policy wanbrg_to_public --set-target ACCEPT
resulting in:
wanbrg_to_public (active)
priority: -1
target: ACCEPT
ingress-zones: libvirt-public
egress-zones: public
services:
ports:
protocols:
masquerade: no
forward-ports:
source-ports:
icmp-blocks:
rich rules:
and finally masquerading has been enabled on the public zone with
firewall-cmd --zone=public --add-masquerade --permanent
firewall-cmd has been reloaded and afaik this should allow me to have vms with a network interface on the WAN-bridge-zoned network using that interface IP as default gateway being masqueraded and able to navigate, eventually I will need to also add port-forward to specific addresses on that interface/zone and I'd like to do that with firewalld
the firewalld backend is nftables.
this doesn't seem to be working tho, a pfsense firewall with an interface and a static IP on the WAN-bridge-zoned network cannot ping outside