Hello my friends.
I'm trying to open a Minecraft server on my rented Linux server. Every thing is almost set.


Welcome to Ubuntu 16.04.3 LTS (GNU/Linux 4.4.0-96-generic i686)

* Documentation: https://help.ubuntu.com
* Management: https://landscape.canonical.com
* Support: https://ubuntu.com/advantage

Welcome to Alibaba Cloud Elastic Compute Service !

Last login: Sat Oct 7 17:16:10 2017 from 122.137.250.6
server@Minecraft:~$ screen -ls
There is a screen on:
8797.RunServer (10/07/2017 05:18:50 PM) (Detached)
1 Socket in /var/run/screen/S-server.
server@Minecraft:~$ screen -r RunServer

>>OpenJDK Server VM warning: You have loaded library /tmp/libnetty-transport-native-epoll6350959555320367288.so which might have disabled stack guard. The VM will try to fix the stack guard now.
>It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'.
>[17:19:22 INFO]: Using default channel type
>[17:19:23 INFO]: This server is running CraftBukkit version git-Bukkit-9a1fc1e (MC: 1.12) (Implementing API version 1.12-R0.1-SNAPSHOT)
[17:42:14 INFO]: Unknown command. Type "help" for help.
[17:42:14 INFO]: Unknown command. Type "help" for help.
[17:42:14 INFO]: Unknown command. Type "help" for help.
[17:42:14 INFO]: Unknown command. Type "help" for help.
>>[17:19:23 INFO]: Preparing level "world"
>[17:19:24 INFO]: Preparing start region for level 0 (Seed: -7643441361641205921)
>[17:19:25 INFO]: Preparing spawn area: 1%
>[17:19:26 INFO]: Preparing spawn area: 31%
>[17:19:27 INFO]: Preparing spawn area: 96%
>[17:19:27 INFO]: Preparing start region for level 1 (Seed: -7643441361641205921)
>[17:19:28 INFO]: Preparing spawn area: 65%
>[17:19:28 INFO]: Preparing start region for level 2 (Seed: -7643441361641205921)
>[17:19:28 INFO]: Server permissions file permissions.yml is empty, ignoring it
>[17:19:29 INFO]: Done (5.835s)! For help, type "help" or "?"


However, when I use my own computer and try to log in my server, my server didn't response. Is there a firewall blocking it?
I tried sudo iptables -A INPUT -p tcp --dport 25565 -j ACCEPT
It didn't work too.
Guys plz help

how do you try to log into your minecraft server?

also keep in mind, firewalls can be both on your client machine, your router, and on the server.

can you access the server on localhost? meaning, on the server itself?

you haven't shown us any firewall settings so far.

What firewall software do you use on your server? The default firewall in Ubuntu is Uncomplicated firewall. Also can you ping your server from your own computer?

You can check if UFW is running by typing (with root privileges):
You can open port 25565 in ufw by typing (with root privileges):
That will allow communication on port 25565 on all interfaces. You can get more syntax information by looking into the man page for UFW.

It also looks that your server is hosted by alibabacloud.com. They seems to have a seperate firewall configuration as outlined in this document. Maybe look into that?

1 members found this post helpful.

Yes that’s right! They have a separate firewall setting. I didn’t notice that before XD

How can this be anything but a spammer?
Even the username speaks to it...

But they didn't do anything "wrong"... yet... well, I reported it anyhow.

Most probably it's the firewall on the server that doesn't allow you to log in. My friend is a moderator on this Minecraft server . When they created it they had the same problem, the server would appear active but it won't allow anyone to join it. They have tried different solutions but none worked. They have even hired an IT consultant to help but there was nothing he could do but offer a piece of advice. He suggested to try and host the server on a different physical server and that did the trick. The only downside was that they couldn't get a refund from the initial one and lost some money but it payed off later.

Spammer reported.