"Not authenticated with Minecraft.net" on BungeeCord

[k-jiang]

What happened?

Premium players can not join a BungeeCord server. Players get "Not authenticated with Minecraft.net" instead. No errors, and no logs from FastLogin.

Mojang API is fine. We have no issue with the network.

What did you expect?

No response

Steps to reproduce

No response

Plugin list

No response

Configuration file

No response

Server log

No response

Plugin version

build 1192

Platform

BungeeCord

Relevance

• [X] I tried the latest build (build refers to development builds not necessary a release version)
• [X] I checked for existing tickets - If there are, please vote them with a thumps reaction and not create new ones

[k-jiang]

It turns out BungeeCord has prevent_proxy_connections enabled by default. When we turned it off everything is fine.

Our BungeeCord is behind an HAProxy / Nginx and has proxy_protocol enabled. So we guess there might be some bug between client IPs obtainment and proxy checking.