The mod itself works, it boots up normal and I can use its commands. It just won't connect to my client whatsoever!
I have the port opened on my router (not using a firewall on server currently) but it gives the plug; on default server port (both with 25565 and -1), on port 24454, on port 24454 when the server port is 24454 (I can't even login with that one so isn't really helpful), all the previous on local network. All player permissions are enabled, so I'm just stumped.

Setup:
MC Paper 1.19.3 (Docker installed)
Ubuntu Server 22.04.2 LTS (no current firewall), no UI
DuckDNS for external connections
Port forwarding: 1. EXT: 25565-25565 INT: 25565 PROT: BOTH
2. EXT: 24454-24454 INT: 24454 PROT: BOTH
No extra IPv6 Firewall rules on router

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