[SOLVED] Server works flawlessly with Vanila but can't connect with Forge 1.12.2

[Reloading]

Following issue:
I'm hosting an 1.12.2 mc server via (debian) Linux VPS <-- IPv6 only.

 

• When I'm starting the Server with the offical 1.12.2, I can connect to the server via Windows Client flawlessly, vanila, no issue.
• But as soon as I start the server with Forge (1.12.2-14.23.5.2768), my windows client notes "Can't connect to server" and the error is: "io.netty.channel.AbstractChannel$AnnotatedConnectException: Connection refused: no further information:"

 

What's happening? Both addresses are IPv6, it can't be the firewall because vanila worked and I even allowed port 25565 (with ufw) still, nothing changed.

 

Edited December 25, 2019 by Reloading

[Reloading]

13 minutes ago, diesieben07 said:

Try launching the server with -Djava.net.preferIPV4Stack=false.

I tried the following command on both the server, still doesnt work nothing changed:

java -Xms1G -Xmx2700M -Djava.net.preferIPV4Stack=false -jar forge-1.12.2-14.23.5.2768-universal.jar nogui

 

Edited December 22, 2019 by Reloading

[Reloading]

Isn't it weird that when I start the server via Vanila, it works flawlessly but the forge one fails with a connection refused error? It's not like the forge.jar is changing the VPSs Firewall or whatever.

[DaemonUmbra]

That's such a generic exception though, can you provide debug.logs from both server and client?

[Reloading]

@DaemonUmbra @diesieben07

I appended the logs for both client and server in the attachment area.

Here's another interesting thing, I re-installed forge and noticed something weird being printed on my terminal when I ran the installer --installServer command:

java.net.preferIPv4Stack=true
Installing server to current directory

So I deleted everything (except the vanila 1.12.2 jar file since it needed by forge) and reinstalled the installer.jar with Djava.net.preferIPV4Stack=false option but I still get that output printed on the terminal... Maybe that's the issue?

 

Anyway see the debug.logs I appended, I replaced certain parts such as the IPv6 for example with <VPS IPv6> or other stuff that I deem possibly private info, this should not affect the overall validity of the logs.

In the client log there's an interesting Java Exception at the bottom about the connection refusal.

 

CLIENTdebug.log SERVERdebug.log

Edited December 23, 2019 by Reloading

[Reloading]

I've discovered the solution to this wide-spread issue that has been plaguing many people's servers.

 

Due to the recent hostility I've received from (supposedly) the mods/admins I've decided NOT to post the solution here, if you're in need of the solution PM me or google on different forums, you'll see it, I hope future visitors can get a picture of how they'll be treated here. 

 

PS: Giving people warnings and post-moderation bans is not going to achieve ANYTHING, we're not in a kindergarten.

Edited December 25, 2019 by Reloading

[DaemonUmbra]

You were reprimanded after posting in other people's threads and DMing mods to draw attention to your own thread, something that is selfish and not allowed.

You are right, this is not kindergarten, not everything is about you.

 

3 hours ago, Reloading said:

I've discovered the solution to this wide-spread issue that has been plaguing many people's servers.

 

Due to the recent hostility I've received from (supposedly) the mods/admins I've decided NOT to post the solution here, if you're in need of the solution PM me or google on different forums, you'll see it, I hope future visitors can get a picture of how they'll be treated here. 

"I could be helpful, but I won't because I don't like the staff"

Real nice...

 

3 hours ago, Reloading said:

PS: Giving people warnings and post-moderation bans is not going to achieve ANYTHING, we're not in a kindergarten.

This one I don't quite understand, these are the two meanings I can think of...

 

"Punishing me doesn't help solve my problem"

It's not supposed to, it's supposed to teach you to be a better forum user

-or-

"Punishing me won't teach me anything, I refuse to learn"

This is a flaw in your character if you refuse to learn or accept that you did wrong