Discourse/Jitsi, aqua network, and host's mail & LDAP servers

[michelandre (Michel-André)]

Hi all and especially @mrmarkuz,

I created a user postier with Cockpit on the NethServer running Discourse.
I also created an alias noreply for portier.

After googling around about aqua network, I saw Markus’ how-to at How to install nxfilter and pihole with docker

@mrmarkuz

Firewall

For testing purposes I decided to open the docker network by policy. In a production environment you should leave this step and set firewall rules.

mkdir -p /etc/e-smith/templates-custom/etc/shorewall/policy
cp /etc/e-smith/templates/etc/shorewall/policy/35aqua /etc/e-smith/templates-custom/etc/shorewall/policy/
cat << 'EOF' > /etc/e-smith/templates-custom/etc/shorewall/policy/35aqua
#
# 35aqua -- the Docker network policy
#
aqua net ACCEPT
$FW aqua ACCEPT
aqua $FW ACCEPT
loc aqua ACCEPT
EOF
signal-event firewall-adjust

I have done these procedures on the NethServer running Discourse.

MIRACLE, Discourse can send notifications using its own mail server.
No more need of a special mail server to send notifications.

The only problem is:

In a production environment you should leave this step and set firewall rules.

QUESTION:

How can I set those required firewall rules (only to communicate with the host mail server) ?

All suggestions will be greatly appreciated,

Michel-André