Hello guys i had one problem why my kamael client when i was changing "hosts" i was getting firewall error in lineage..I think,i found how u wont take these "firewall errors" Just follow these steps and tell me if i helped u...
1:open hosts and extract the Ip of server
2:Save it but DONT close "hosts" leave it open
3:Open lineage 2 kamael server and here u are u wont have firewall problem
I had the same problem and when i leave "hosts" opened i dont get firewall errors
Maybe i helped u on my computer it works fine :D
Enjoy Kamael :P