Firewall change for server networks

In the process of migrating our server networks to new and faster stuff, we are moving the gateways to our (C&CZ) managed firewalls. These firewalls already handle the traffic to our 25Gbit networks, while the older 1Gbit/s connected nodes had the gateway in a temporary router, which came to replace the old DR-HUYG router a few years ago.

While we don’t expect too much trouble, a hiccup may occur for up to a minute or so, while the network changes are being applied.

Update: we’ve transferred 3 subnets, 2 remain for another time. There was a glitch when moving the first network, where roundcube, a database server and some more services live, so they were unreachable for about 10-15 minutes between 11:05 and 11:18.