Astellia Online doesnt work.
only full VPN mode can play the game
please add site https://astellia.nexon.com/ and make the game work without full VPN mode
As workaround you should use one of methods at Unsupported Games. And if you want to see it officially at Mudfish, please send me some game packets using Packet Capture with Mudfish link while playing the game with Full VPN mode