On Mar 12, 2019, 20:00 UTC the following probe server will be changing IP addresses:
PL-Warsaw(GTS)-1 18.104.22.168 / 2a00:11c0:30:777::4
PL-Warsaw(PLIX)-2: 22.214.171.124 / 2a03:f80:48:37:235:48:195:1
This is due to IPv6 connectivity issues with our current location/provider.
If you have whitelisted please make sure you update your firewall in preparation.