Due to the NatiONal Day the 高墙 is currently very aggressive. To mitigate this, we are testing multiple approaches, and we are disabling certain features on servers 2-5.
More specifically, encryptiON method is always 'aes-256-gcm' on servers 2-5 regardless of your selection. Also, servers 3-5 do not support UDP transport.
Server #1 has all features enabled, however we are observing an increased level of filtering in this case.