Port 51413 always closed?

[EvilRobo]

Hi. Im using Transmission client. Have port forwarded in the Transmission client, windows firewalls and my Eero router, port still shows closed.

I spoke to talk talk and they said theres nothing they can change. Really not sure what else it can be.

Thank you

[Thabile-TT]

@KeithFrench thanks again for the support.

[KeithFrench]

Hi @EvilRobo 

In the app go to:-

Settings > Network Settings > Network Services > Reservation & port forwarding

Tap the device in question, and the resulting screen shows the Port Forwarding settings you have used; that is what I need to see.

To protect your privacy, please PM this screenshot to me.

You may well have set your rule to use TCP/UDP, but that is not what I need to know. Is the service (Transmission Client) using TCP or UDP for this port? You may need to contact their tech support to find this out.

The information below is provided by TalkTalk. For confirmation, please contact @Lorrainef, the manager of the TalkTalk support staff on this forum.

KeithFrench is one of our valued Community Stars and can help with a range of issues related to wireless and networking. At times, he may ask you to send him test results via a Private Message to help analyse/diagnose an issue. Although Keith does not work for TalkTalk, he very kindly shares his time and knowledge to help others.

If you need further help or if we need to take any details such as personal information about your account, like phone numbers, account numbers, etc, one of the TalkTalk team will jump in and help out.

[EvilRobo]

Hi Keith.  What screenshot would you like from the app specifically?

UDP and TCP are selected and both have port forwarding exceptions created for them.

Thank you.

[Thabile-TT]

@KeithFrench thank you for the support.

[KeithFrench]

Hi @EvilRobo 

Please can you get me a screenshot from the eero app so that I can check this for you? Is this port using TCP or UDP & how are you testing it? If it is UDP and you are using a port checking website, then this will always report closed. This is because UDP behaves differently from TCP & is incompatible with these websites.

[Thabile-TT]

@EvilRobo thanks for confirming that you have tried all this. We will further look into this issue please bear with me while we further investigate. I will come back once there is some feedback.  

[EvilRobo]

Yeh, I e-chatted with them earlier and they said it wasnt the case (they said the dont use cgnat . But everything points to it being that.

[EvilRobo]

Already done as I mentioned

[Thabile-TT]

@EvilRobo Please refer to the following article on port forwarding: Set up port forwarding

[Thabile-TT]

Hi there @EvilRobo, It sounds like you’ve done all the right local steps — forwarding the port in Transmission, Windows Firewall, and your Eero router — but the port still shows closed. Given your ISP is TalkTalk, the most likely cause is 1.You're behind CGNAT (Carrier‑Grade NAT) When an ISP uses CGNAT, your home router does not get a real public IP address, so no matter what you forward locally, the port will always appear closed externally. @KeithFrench  any workaround you can suggest?