I've set up port forwarding on the HG635 as per the usual instructions: Internet -> port forwarding -> port mapping -> add new port mapping -> add port mapping application -> add etc.
However, the port isn't being forwarded.
Are talktalk still allowing port forwarding at their end, or do I have to request something?
Port forwarding is of course allowed, but I cannot help you unless you provide more details.
Please tell me which TCP or UDP port you are trying to forward & please include a screenshot of what you have setup in the router. What sort of device are you trying to forward to & what operating system is it running. If a Windows PC, have you added an inbound rule to the firewall?
How are you trying to test this?
Port 3000, both TCP and UDP. Screenshots attached (sorry, it doesn't allow png attachments).
Trying to make port 3000 of a Linux (Ubuntu 18.04) server visible to the world.
Its not a firewall problem on the server, as its available to other hosts on my LAN/wifi.
I've tried with the talktalk router firewall disabled and set to "talktalk".
Trying to test by connecting to the port, port scanning, etc (from outside my LAN).
There is nothing wrong with the port forwarding rule on the router, please re-enable the router's firewall with its default configuration. That is not the issue. The port forwarding rule punches a hole through the firewall for this port. The next steps are as follows:-
I've changed it to port 22, ssh, using the built in SecureShellServer option.
It is still not working - and I know this isn't a problem with the server (a laptop, which is always ssh accessible on other networks, and on the LAN).
The external IP address as detected by websites (google what is my ip), and as given by the router agree.
I am not testing with loopback - i.e internally.
I cannot ssh from public internet servers which I have access to back to my network.
This is almost certainly a problem either with router settings (which I don't think is the case), or with talktalk blocking port forwarding.
Are there any talktalk staff on here who would be able to help?
This post suggests it is a talktalk problem:
The link that you put in one of your recent replies refers to a WiFi Hub, which is totally different to an HG635. All routers that I have ever tested work correctly where port forwarding is concerned (OK I have never tested the HG635, because I never had one, the HG633 works fine & is nearly identical). I have certainly helped other people with the HG635 & got their port forwarding working.
On my Sagemcom WiFi hub I just tried to forward TCP port 22 for SSH to my PC & it worked first time.
Just got back to checking this, and talktalk have opened up the port their end.
For anyone reading this in the future - basically, by default, it seems that talktalk don't allow port forwarding, and that you have to request it, e.g here, and then wait a few days.