Question Connection Error When Hosting on WSL

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H

Huey

New member
Jun 2, 2024
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I know that it's very strange to host something on WSL, but I want to use Windows' GUI (e.g. for gaming), while hosting a server without using the <s>&ZeroWidthSpace; disgusting &ZeroWidthSpace;</s> windows commands.

## What I'm Doing

First, I had a server computer with windows 11 pro, and installed WSL:

Code: 
OS: Debian GNU/Linux bookworm 12.5 x86_64, 
Kernel: Linux 5.15.146.1-microsoft-standard-WSL2

Then I opened a tmux session and ran Velocity on port 25565

Code: 
[08:03:41 INFO]: Velocity 3.3.0-SNAPSHOT (git-71bb0246-b392)
[08:03:41 INFO]: Copyright 2018-2024 Velocity Contributors. Velocity is licensed under the terms of the GNU General Public License v3.
[08:03:41 INFO]: velocitypowered.com - GitHub

The only part I changed in the config file:

Code: 
# What port should the proxy be bound to? By default, we'll bind to all addresses on port 25577.
bind = "0.0.0.0:25565"

## The Issue

When I open Minecraft on the server computer itself and try to connect to the WSL IP (172.27.203.221), I got this (on the server side):

Code: 
log                                                                                           
[19:55:57 ERROR]: Unable to authenticate player                                                                                                                                    java.util.concurrent.CompletionException: java.net.ConnectException                                                                                                                        at java.base/java.util.concurrent.CompletableFuture.encodeRelay(CompletableFuture.java:368) ~[?:?]
        at java.base/java.util.concurrent.CompletableFuture.uniComposeStage(CompletableFuture.java:1189) ~[?:?]
        at java.base/java.util.concurrent.CompletableFuture.thenCompose(CompletableFuture.java:2309) ~[?:?]
        at java.net.http/jdk.internal.net.http.MultiExchange.responseAsyncImpl(MultiExchange.java:453) ~[java.net.http:?]                                                                  at java.net.http/jdk.internal.net.http.MultiExchange.lambda$responseAsyncImpl$7(MultiExchange.java:449) ~[java.net.http:?]
        at java.base/java.util.concurrent.CompletableFuture.uniHandle(CompletableFuture.java:934) ~[?:?]                                                                                   at java.base/java.util.concurrent.CompletableFuture.uniHandleStage(CompletableFuture.java:950) ~[?:?]
        at java.base/java.util.concurrent.CompletableFuture.handle(CompletableFuture.java:2340) ~[?:?]                                                                                     at java.net.http/jdk.internal.net.http.MultiExchange.responseAsyncImpl(MultiExchange.java:439) ~[java.net.http:?]
        at java.net.http/jdk.internal.net.http.MultiExchange.lambda$responseAsync0$2(MultiExchange.java:341) ~[java.net.http:?]
        at java.base/java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1150) ~[?:?]                                                                         at java.base/java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:510) ~[?:?]
        at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1773) ~[?:?]
        at io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:173) ~[velocity.jar:3.3.0-SNAPSHOT (git-71bb0246-b392)]
        at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:166) ~[velocity.jar:3.3.0-SNAPSHOT (git-71bb0246-b392)]
        at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:470) ~[velocity.jar:3.3.0-SNAPSHOT (git-71bb0246-b392)]
        at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:413) ~[velocity.jar:3.3.0-SNAPSHOT (git-71bb0246-b392)]
        at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997) ~[velocity.jar:3.3.0-SNAPSHOT (git-71bb0246-b392)]
        at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[velocity.jar:3.3.0-SNAPSHOT (git-71bb0246-b392)]
        at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[velocity.jar:3.3.0-SNAPSHOT (git-71bb0246-b392)]
        at java.base/java.lang.Thread.run(Thread.java:840) [?:?]                 
Caused by: java.net.ConnectException
        at java.net.http/jdk.internal.net.http.common.Utils.toConnectException(Utils.java:1055) ~[java.net.http:?]
        at java.net.http/jdk.internal.net.http.PlainHttpConnection.connectAsync(PlainHttpConnection.java:198) ~[java.net.http:?]
        at java.net.http/jdk.internal.net.http.AsyncSSLConnection.connectAsync(AsyncSSLConnection.java:56) ~[java.net.http:?]
        at java.net.http/jdk.internal.net.http.Http2Connection.createAsync(Http2Connection.java:378) ~[java.net.http:?]
        at java.net.http/jdk.internal.net.http.Http2ClientImpl.getConnectionFor(Http2ClientImpl.java:126) ~[java.net.http:?]
        at java.net.http/jdk.internal.net.http.ExchangeImpl.get(ExchangeImpl.java:93) ~[java.net.http:?]                                                                                   at java.net.http/jdk.internal.net.http.Exchange.establishExchange(Exchange.java:343) ~[java.net.http:?]
        at java.net.http/jdk.internal.net.http.Exchange.responseAsyncImpl0(Exchange.java:475) ~[java.net.http:?]
        at java.net.http/jdk.internal.net.http.Exchange.responseAsyncImpl(Exchange.java:380) ~[java.net.http:?]
        at java.net.http/jdk.internal.net.http.Exchange.responseAsync(Exchange.java:372) ~[java.net.http:?]
        at java.net.http/jdk.internal.net.http.MultiExchange.responseAsyncImpl(MultiExchange.java:408) ~[java.net.http:?]
        ... 17 more
Caused by: java.nio.channels.UnresolvedAddressException                                                                                                                                    at java.base/sun.nio.ch.Net.checkAddress(Net.java:149) ~[?:?]                                                                                                                      at java.base/sun.nio.ch.Net.checkAddress(Net.java:157) ~[?:?]                                                                                                                      at java.base/sun.nio.ch.SocketChannelImpl.checkRemote(SocketChannelImpl.java:816) ~[?:?]                                                                                           at java.base/sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:839) ~[?:?]                                                                                               at java.net.http/jdk.internal.net.http.PlainHttpConnection.lambda$connectAsync$0(PlainHttpConnection.java:183) ~[java.net.http:?]
        at java.base/java.security.AccessController.doPrivileged(AccessController.java:569) ~[?:?]                                                                                         at java.net.http/jdk.internal.net.http.PlainHttpConnection.connectAsync(PlainHttpConnection.java:185) ~[java.net.http:?]
        at java.net.http/jdk.internal.net.http.AsyncSSLConnection.connectAsync(AsyncSSLConnection.java:56) ~[java.net.http:?]
        at java.net.http/jdk.internal.net.http.Http2Connection.createAsync(Http2Connection.java:378) ~[java.net.http:?]
        at java.net.http/jdk.internal.net.http.Http2ClientImpl.getConnectionFor(Http2ClientImpl.java:126) ~[java.net.http:?]
        at java.net.http/jdk.internal.net.http.ExchangeImpl.get(ExchangeImpl.java:93) ~[java.net.http:?]                                                                                   at java.net.http/jdk.internal.net.http.Exchange.establishExchange(Exchange.java:343) ~[java.net.http:?]
        at java.net.http/jdk.internal.net.http.Exchange.responseAsyncImpl0(Exchange.java:475) ~[java.net.http:?]
        at java.net.http/jdk.internal.net.http.Exchange.responseAsyncImpl(Exchange.java:380) ~[java.net.http:?]
        at java.net.http/jdk.internal.net.http.Exchange.responseAsync(Exchange.java:372) ~[java.net.http:?]
        at java.net.http/jdk.internal.net.http.MultiExchange.responseAsyncImpl(MultiExchange.java:408) ~[java.net.http:?]
        ... 17 more
[19:55:57 INFO]: [initial connection] /172.27.192.1:52290 has disconnected:

As you can see, the Unable to authenticate player error pops out and the player disconnected without any reason shown

## Things I Tried to Solve the Problem

I don't even know what is happening!
In my opinion, there should be no problem at all when connecting to its own WSL from Windows

But I still tried something:

1. netsh: Using portproxy to forward port to WSL

Code: 
Listen on ipv4:             Connect to ipv4:

Address         Port        Address         Port
--------------- ----------  --------------- ----------
0.0.0.0         22          172.27.203.221  22
0.0.0.0         25565       172.27.203.221  25565

2. Hyper-V: Changing the WSL V-Switch to External Network would make the computer lost network connection completely

## Expectation

I can do something so that I can connect to the Minecraft server from any computer in LAN

## By the Way

  • I can connect to the SSH server hosting on WSL from any computer on LAN
  • I can ping the Minecraft server from the server computer's Minecraft (though it takes about 4 seconds to ping), but cannot detect it from other computer on LAN

Because the question is a bit complex, I might forget some details or things that I have tried to do. If you think my description is unclear, please correct me (>.-)d

P.S. Markdown ain't supported on this site?
 
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