Description: Unable to connect to server. So LOST

Jeff_Williams · March 30, 2025, 3:23pm

OS Name/Version: Ubuntu 24.04.2 LTS

Product Name/Version: ( AMP Release "Phobos"v2.6.1.2, built 25/03/2025 13:00)

Problem: Unable to connect to instance

Steps to reproduce:

Step 1- Installed AMP with docker
Step 2 - Created instance
Step 3 - Started instance
step 4- started server
step 5 - opened all ports for game in router (ubiquity Dream machine Pro)
step 6 - Tried to connect to public IP and failed
step 7 - can connect locally.

Actions taken to resolve so far:
Searched the support and did some troubleshooting with displaying the firewall ports and the instance. the instance has 0.0.0.0 for IP.
Rebooted router
Rebooted server.
Rebuilt instance
still can not connect.

Below is Amp info

OS	Linux
Platform	Ubuntu 24.04.2
System Type	x86_64
Hardware Platform	Gigabyte Technology Co., Ltd. AX370-Gaming K7
CPU Model	AMD Ryzen 7 1800X Eight-Core Processor
CPU Layout	1S/8C/16T
Installed RAM	32038
Virtualization	None
Network Mode	Standard
Module	ADSModule
Module Application	Application Deployment
Loaded Plugins	FileManagerPlugin, EmailSenderPlugin, WebRequestPlugin, LocalFileBackupPlugin, CommonCorePlugin, AnalyticsPlugin
Application Name	AMP
Application Version	2.6.1.2
Codename	Phobos
Tools Version	2.6.1.2
Release Stream	Mainline
Build Spec	Release
Build Date	25/03/2025 13:00
InstanceID	5921bd05-cbff-41ca-9cb1-95274bc05b3f
Last Executable
Last Arguments
Last Process ID	786436

Greelan · March 30, 2025, 9:27pm

Check that you have NAT hairpin enabled in the UDM Pro and that your WAN address as shown in the UDM Pro isn’t in the range 100.64.x.x to 100.127.x.x

Jeff_Williams · March 30, 2025, 10:06pm

My ip is not in the range 100.64.x.x to 100.127.x.x and unify doc say hairpin NAT is already enabled.

Mike · March 30, 2025, 10:13pm

Assuming this is home hosted - are you able to connect using a different device using your internal IP?

If you can connect locally using your internal IP, then it’s a port forwarding/NAT/hairpin issue. If you can’t, it’s an issue with the firewall on the machine AMP is running on.

Also what exactly happens when you try and connect?

Jeff_Williams · March 30, 2025, 10:51pm

When I try to connect from game to server 7d2d. tell me not found could not retrieve sever info. that is from out side. Do i need to create a NAT rule? I have used Steam CMD before and never had to change Nat route I just used port forwarding. and yes I can connect locally

Greelan · March 30, 2025, 10:57pm

Show your port forwarding rules

Jeff_Williams · March 30, 2025, 11:05pm

of course the x.x.x.x is to block out ip.

App	Protocol	Remote Port	Dest	External IP	Local Port	Interface
7D2D-Game Ports-TCP	TCP/UDP	Any	10.171.5.5:26900	x.x.x.x	26900	Primary (WAN1)
7D2D-Game Ports-Udp	UDP	Any	10.171.5.5:26901-26902	x.x.x.x	26901-26902	Primary (WAN1)

Greelan · March 31, 2025, 1:35am

You are missing a forward. You need to forward at least:
26900 TCP/UDP (Server and Steam Port)
26901-26903 UDP (Server Port +1, +2, +3)

Assuming the default ports are allocated in AMP - adapt as needed

Mike · March 31, 2025, 9:36am

Also the external IP should be empty - by putting a value there you’re limiting it to connections only from that IP.

Jeff_Williams · March 31, 2025, 2:23pm

@Greelan When you say “Assuming the default ports are allocated in AMP” you are talking about the listening ports in the instance.

@Mike Yes Mike, in the instance is says 0.0.0.0:26900.I will assume that is what you are talking about

Mike · March 31, 2025, 2:33pm

I’m talking about your port forwarding rules. I’m pretty sure you’ve unintentionally set it up so anyone can connect. Show us a screenshot of the Unifi settings, censoring out your external IP only.

Jeff_Williams · March 31, 2025, 7:29pm

Here you go

Mike · April 2, 2025, 11:58am

Okay that all looks fine - did you check what I said earlier whether a different device on the same network can connect using your Internal IP?