The internet provider stepped in to restrict the internet connection because they saw that mdns was reachable from the internet. I immediately cancelled the “exposed host” setting and also changed a setting in the internet account settings so that they temporarily filter some ports for us (including mdns). They were saying that mdns could be used for DDOS attacks.
Pioneer Freedombox has only 1 ethernet interface. eth0 is marked as external
mdns is listed under: sudo firewall-cmd --zone=internal --list-services
mdsn is NOT listed under: sudo firewall-cmd --zone=external --list-services
According to firewalld.service the firewall was running:
firewalld.service - firewalld - dynamic firewall daemon
Loaded: loaded (/lib/systemd/system/firewalld.service; enabled; vendor preset
Active: active (running) since Tue 2020-04-07 12:13:34 CEST; 2 days ago
Main PID: 292 (firewalld)
Tasks: 2 (limit: 2303)
└─292 /usr/bin/python3 /usr/sbin/firewalld --nofork --nopid
According to Plinth the firewall might not be running.
But clicking on diagnostics the firewall is reported as running.
Some general info:
- The freedombox runs version 20.5
- The freedombox was marked as exposed host in the router/modem configuration (ipv4 and ipv6)
Anyone any idea what happened ?