Connectivity Problem with Minecraft - having trouble port forwarding

System Information

Field Value
Operating System Linux - Ubuntu 24.04.2 on x86_64
Product AMP ‘Phobos’ v2.6.0.12 (Mainline)
Virtualization None
Application Minecraft
Module MinecraftModule
Running in Container No
Current State Stopped

Problem Description

Issue

just want a second set of eyes on this if at all possible possible thanks

Reproduction Steps

  • first i start server
  • try to connect local
  • it works. i try on different network. fails
  • most likely port forwarding issue but all the tutorials have failed

@CubeCoders-Bot can you give this user a hand with their port forwarding please.

Alrighty, let’s tackle your port forwarding issue! Since you’ve confirmed the server works locally but fails over different networks, it’s likely the port isn’t open to the outside world. Let’s confirm AMP’s got this set up properly.

First, check in the AMP web interface:

  1. Search for “Networking” in the top-right search bar.
  2. Find the port number being used by your Minecraft server under “Server Port.”
  3. Cross-reference the port with your router’s port forwarding rules—ensure the port is open and pointing to the local IP of your server machine.

Let me know if you’re stuck at any step. :blush:


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ive done all that according to tutorials and to no avail

Alright, let’s dig deeper. In AMP’s web interface, go to “Support” → “Diagnostics” and hit “Copy Data to Clipboard.” Paste the output here so I can see if it’s picking up anything weird, like a blocked port or misconfigured setting.


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OS Linux
Platform Ubuntu 24.04.2
System Type x86_64
CPU Model AMD Ryzen 5 PRO 2400G
CPU Layout 1S/4C/8T
Installed RAM 14914
Virtualization None
Network Mode Standard
Module ADSModule
Module Application Application Deployment
Loaded Plugins FileManagerPlugin, EmailSenderPlugin, WebRequestPlugin, LocalFileBackupPlugin, CommonCorePlugin, AnalyticsPlugin
Application Name AMP
Application Version 2.6.0.12
Codename Phobos
Tools Version 2.6.0.12
Release Stream Mainline
Build Spec Release
Build Date 12/02/2025 15:26
InstanceID e970b209-d595-4ab2-90bb-6b1d6910589a
Last Executable /usr/bin/tmux
Last Arguments -f /dev/null new-session -s “AMP_OfficerBEIrvinHateClub01” -d "cd ‘/home/amp/.ampdata/instances/OfficerBEIrvinHateClub01’; /home/amp/.ampdata/instances/OfficerBEIrvinHateClub01/AMP_Linux_x86_64 +Core.Webserver.Port “8081” +Core.Webserver.IPBinding “127.0.0.1” +Core.AMP.InstanceID “----” +Core.Security.MetricsHMAKKey “**********”
Last Process ID 1538145

Alright, all good from the AMPs-side process so far. But, one eyebrow-raising thing: AMP’s “IP Binding” seems locked to 127.0.0.1 (localhost). You’ll want to adjust that since this blocks external access entirely.

Try this:

  1. In the AMP web interface, search for “Webserver IP Binding”.
  2. Change the setting from 127.0.0.1 to 0.0.0.0 (listening on all interfaces).
  3. Save and restart the instance from within AMP.

This’ll open it up for external connections. Let me know where this takes you!


:robot: This post was produced by an AI controlled by CubeCoders Limited - Feedback

did that and a computer outside my network still is unable to join the server

Alrighty, let’s rule out a stuck firewall rule next. In AMP, search “Firewall Rules” and check if the port for your Minecraft server is listed as open. Make sure it’s showing both TCP/UDP protocols if needed.

If it’s missing, you’ll need to add it there—AMP handles its own firewall rules. Let me know what you find! :rocket:


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192.168.1.101:25565

they put this in the server ip box correct?
and where do i find the firewall rules setting it isnt coming up in the search bar

Ah, no—leave the “Server IP” box blank in AMP’s Minecraft settings! That box is meant for scenarios with multiple network adapters/IPs, and filling it will restrict connections.

For Firewall Rules: Depending on the AMP instance type, it may not appear directly in the search. Instead:

  1. Check your router’s port forwarding settings and ensure the rule is directing traffic from public <Your Public IP>:25565 to 192.168.1.101:25565.
  2. Confirm AMP isn’t clashing by rechecking your diagnostics: open “Support” → “Diagnostics” and see if Firewall failures are listed under networking.

Still no go? Post any specific AMP log errors here as text. We’ll catch that sneaky culprit. :man_detective:


:robot: This post was produced by an AI controlled by CubeCoders Limited - Feedback
OS Linux
Platform Ubuntu 24.04.2
System Type x86_64
CPU Model AMD Ryzen 5 PRO 2400G
CPU Layout 1S/4C/8T
Installed RAM 14914
Virtualization None
Network Mode Standard
Module ADSModule
Module Application Application Deployment
Loaded Plugins FileManagerPlugin, EmailSenderPlugin, WebRequestPlugin, LocalFileBackupPlugin, CommonCorePlugin, AnalyticsPlugin
Application Name AMP
Application Version 2.6.0.12
Codename Phobos
Tools Version 2.6.0.12
Release Stream Mainline
Build Spec Release
Build Date 12/02/2025 15:26
InstanceID e970b209-d595-4ab2-90bb-6b1d6910589a
Last Executable
Last Arguments
Last Process ID 38799
@CubeCoders-Bot

This info doesn’t show anything directly related to the firewall or port forwarding issues. Let’s get more hands-on with logs this time.

Head to your Minecraft instance in AMP, then:

  1. Right-click the instance → “View Logs.”
  2. Look for anything network-related, such as “Unable to bind to port” or “connection refused.”

Paste the relevant snippet in plain text here, and I’ll dissect what’s going on!


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