ER7406 Port Forwarding via Omada - Ports Remain Closed

ER7406 Port Forwarding via Omada - Ports Remain Closed

ER7406 Port Forwarding via Omada - Ports Remain Closed
ER7406 Port Forwarding via Omada - Ports Remain Closed
2025-06-11 14:29:49 - last edited 2025-06-13 00:30:37
Model: ER7406  
Hardware Version: V1
Firmware Version: 1.2.0

Hi,

 

I'm currently setting up a new network & server for home, and I'm struggling to get port forwarding working. Specifically, the application is RustDesk.

 

Networking equipment consists of an ER7406 Router, TL-SG3428XMP Switch, with Omada Software Controller, which is installed on the same physical server that I am attempting to have RustDesk on.

 

This physical server has 3x network connections: 1x 1GbE RJ45 on Port 22 (192.168.0.100); 1x 10GbE SFP+ on Port 25 (192.168.0.2); and 1x 10GbE SFP+ on Port 27 (192.168.0.3). It is the 1GbE connection on Port 22 (192.168.0.100) that I'm wanting to use for this traffic.
 

RustDesk requires TCP Ports 21115, 21117, 21118, 21119, and UDP Port 21116.

 

These ports have been added to Windows Firewall and are confirmed open via "telnet 192.168.0.100 2111x" on another client on the network. CurrPorts also confirms the server is listening on these ports:

 

These ports have also been added to Omada:

 

However, these ports remain closed. Online port checkers show the ports closed. Telnet (using the external / static IP) shows the ports closed. RustDesk fails to connect.

 

What am I doing wrong?

 

Thanks

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#1
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1 Accepted Solution
Re:ER7406 Port Forwarding via Omada - Ports Remain Closed-Solution
2025-06-12 01:36:29 - last edited 2025-06-13 00:30:37

  @Hayden-N 

Start with the basic docs on the forum.

 

What you provided now does not contribute to a constructive suggestion from me or other community members. 

If you have questions on how to post properly, you may refer to the How-to guide on using the forum.

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#2
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Re:ER7406 Port Forwarding via Omada - Ports Remain Closed-Solution
2025-06-12 01:36:29 - last edited 2025-06-13 00:30:37

  @Hayden-N 

Start with the basic docs on the forum.

 

What you provided now does not contribute to a constructive suggestion from me or other community members. 

If you have questions on how to post properly, you may refer to the How-to guide on using the forum.

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#2
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Re:ER7406 Port Forwarding via Omada - Ports Remain Closed
2025-06-12 01:41:02 - last edited 2025-06-12 01:41:40

  @Clive_A thanks for that, I have been through that and trawled through the forums already which should be evident from the checks using telnet and CurrPorts etc. If there's anything in particular you think I'm missing that would help you provide a constructive response, then please advise.

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Re:ER7406 Port Forwarding via Omada - Ports Remain Closed
2025-06-12 02:37:59

  @Hayden-N 

Hayden-N wrote

  @Clive_A thanks for that, I have been through that and trawled through the forums already which should be evident from the checks using telnet and CurrPorts etc. If there's anything in particular you think I'm missing that would help you provide a constructive response, then please advise.

What's the result for each step in that guide? 

I at least need to know them before I find a problem and make a suggestion. 

This still does not make sense to me for a constructive suggestion. Any step in that guide, if there is a problem with that, it would not work. 

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Re:ER7406 Port Forwarding via Omada - Ports Remain Closed
2025-06-12 03:02:59 - last edited 2025-06-12 03:11:34

  @Clive_A 

 

1. Yes, the server is accessible from the local network, as confirmed by telnet 192.168.0.100 on each of the ports.

 

2. Yes, I have verified the port forwarding settings in the router, as confirmed by my screenshot above.

 

3. Yes, the router is getting a public (static) IP address. I won't share that here for obvious reasons.

 

4. Yes, I have confirmed with my ISP that they do not block or restrict any ports.

 

5. Yes, I have restarted the router, the switch, the server - everything. No change.

 

6. Yes, I have verified that the local firewall on the physical server is passing the ports, as confirmed by my screenshot above.

 

As for the tips: both online port checkers and telnet have been used to verify, as per above and my previous posts.

 

If it is of any use, Omada seems to be running / accessible off one of the 10GbE SFP ports (192.168.0.3), whereas I am directing these ports to the 1GbE RJ45 port (192.168.0.100) - though this is likely because Windows 11 is prioritising the 10GbE connection by default and I've not yet started to control the traffic / apply QoS across each of these connections, other than specifically pointing RustDesk to x.0.100. In any case, all three connections to the physical server (x.0.2, x.0.3, and x.0.100) are confirmed working.

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Re:ER7406 Port Forwarding via Omada - Ports Remain Closed
2025-06-12 03:27:38

  @Hayden-N 

Hayden-N wrote

  @Clive_A 

 

1. Yes, the server is accessible from the local network, as confirmed by telnet 192.168.0.100 on each of the ports.

 

2. Yes, I have verified the port forwarding settings in the router, as confirmed by my screenshot above.

 

3. Yes, the router is getting a public (static) IP address. I won't share that here for obvious reasons.

 

4. Yes, I have confirmed with my ISP that they do not block or restrict any ports.

 

5. Yes, I have restarted the router, the switch, the server - everything. No change.

 

6. Yes, I have verified that the local firewall on the physical server is passing the ports, as confirmed by my screenshot above.

 

As for the tips: both online port checkers and telnet have been used to verify, as per above and my previous posts.

 

If it is of any use, Omada seems to be running / accessible off one of the 10GbE SFP ports (192.168.0.3), whereas I am directing these ports to the 1GbE RJ45 port (192.168.0.100) - though this is likely because Windows 11 is prioritising the 10GbE connection by default and I've not yet started to control the traffic / apply QoS across each of these connections, other than specifically pointing RustDesk to x.0.100. In any case, all three connections to the physical server (x.0.2, x.0.3, and x.0.100) are confirmed working.

That is to say that your WAN info on the controller interface shows the same IP as you try the whatismyip website? 

Strange enough, in my network, port forwarding always works. Even though I have a dynamic IP with DDNS, it always works.

 

Port forward a simple web interface, will that work? If that works, that means the integrity of the port forwarding(NAT) is fine. That would be a problem with the software. 

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