This topic

Smart Hub 2 Manager Port Forwarding is not working

yshakoor — Fri, 01 Oct 2021 16:06:18 GMT

Hi,

I am trying to port to portfording from Smart Hub 2 to my laptop for port 22. This was working fine when I started using the service and then I never used it. Now I am trying to re-use this functionality & it is not working.

Post forwarding is setup of TCP for port 22 and rule does show it's there in the Smart Hub manager.

When I try to test this from public network, my IPv4 Public IP never returns anything for port 22.

I am using BT Fiber to home solution, can someone please confirm why port forwarding is not working.

Thanks

Yasser

Re: Smart Hub 2 Manager Port Forwarding is not working

pippincp — Fri, 01 Oct 2021 16:19:31 GMT

Testing from a public network will fail as it is done via ICMP request which BT hubs do not respond to.

Re: Smart Hub 2 Manager Port Forwarding is not working

yshakoor — Fri, 01 Oct 2021 16:23:00 GMT

I am not using icmp I am using telnet to test and also tried ssh to the public IP both fails.

Re: Smart Hub 2 Manager Port Forwarding is not working

licquorice — Fri, 01 Oct 2021 16:41:39 GMT

Is there an SSH server listening on port22 of the device you have forwarded the port to, if not the port won't be open.

If so, factory reset the hub, turn off smart setup and set up the port forward again.

Re: Smart Hub 2 Manager Port Forwarding is not working

yshakoor — Fri, 01 Oct 2021 17:23:49 GMT

Thanks yes, my MAC laptop has ssh server and it's listening on port 22.
I will try to factory reset to see if this will solve the problem.

Re: Smart Hub 2 Manager Port Forwarding is not working

yshakoor — Fri, 01 Oct 2021 17:46:49 GMT

@licquorice: Tried factory reset and switching off the smart setup still no luck. I have even tried disabling the firewall but I don't in the logs any incoming request.

Re: Smart Hub 2 Manager Port Forwarding is not working

licquorice — Fri, 01 Oct 2021 17:52:45 GMT

How are you trying to connect? To make sure it isn't a NAT loopback problem (although the SH2 does support it) make sure you are trying to connect via a 4g or other connection rather than via the hub.

Re: Smart Hub 2 Manager Port Forwarding is not working

yshakoor — Fri, 01 Oct 2021 18:19:39 GMT

@licquorice: Tried with 4G same results, I have tried even another port to check if this is port 22 which s causing issue. To me it looks like something is blocked by BT.
Here is my public IP, you can give it a try:
X.X.X.X

Port 22 and Port 8000 is forwarded to MAC laptop, SSH server listening on port 22 and nc is listening on port 8000.

Re: Smart Hub 2 Manager Port Forwarding is not working

licquorice — Fri, 01 Oct 2021 18:17:04 GMT

Nope, no connection. Might be worth editing out your IP address before too many people see it.

Re: Smart Hub 2 Manager Port Forwarding is not working

licquorice — Fri, 01 Oct 2021 18:20:03 GMT

Deleted, already tried.

Re: Smart Hub 2 Manager Port Forwarding is not working

yshakoor — Fri, 01 Oct 2021 18:21:31 GMT

@licquorice: Yes this is possible but as said I have tried with port 8000 with nc this doesn't worked, I highly doubt non standard port for ssh will work but will give it a try.

Re: Smart Hub 2 Manager Port Forwarding is not working

licquorice — Fri, 01 Oct 2021 18:25:22 GMT

Yeah, that's why I deleted the post.

I don't know what else to suggest. Port forwarding to a web server works ok for me on port 80.

Re: Smart Hub 2 Manager Port Forwarding is not working

Keith_Beddoe — Fri, 01 Oct 2021 18:50:56 GMT

@yshakoor

If your public IP address is still the same, why is port 8085 tcp open?

Final trace goes to 6 32.00 ms ls192525-bury-healthcare.manchester-naccess1.ukcore.bt.net

before terminating on your host.

Are you a business user?

These results were provided by NMAP.

Re: Smart Hub 2 Manager Port Forwarding is not working

yshakoor — Fri, 01 Oct 2021 19:01:28 GMT

@Keith_Beddoe: Yes my IP is same and I can see in Firewall someone tired to scan the ports. I have not opened the port 8085 and reading more it looks like this is open by default by the BT HUB.

https://community.bt.com/t5/Archive-Staging/Port-8085-is-opened-what-does-it-do/td-p/1482304

So to confirm my port forwarding doen't involve port 8085, I am trying to use port 22 and 8000 by port forwarding and it's not working.

I am not a business user, I am using BT Fiber to Home solution.

Re: Smart Hub 2 Manager Port Forwarding is not working

Keith_Beddoe — Fri, 01 Oct 2021 19:07:27 GMT

I use the publicly available NMAP program to identify issues that are raised here, as its the quickest way to get results. Microsoft portquery is another useful tool. No other ports were shown as open.

I do not use a BT home hub, so I do not know what ports are left open. I do know there are reported issues with the BT hubs, when trying to forward ports, and the usual solution is to do a full factory reset of the home hub, and then setup port forwarding rules again.

Re: Smart Hub 2 Manager Port Forwarding is not working

Keith_Beddoe — Fri, 01 Oct 2021 19:38:45 GMT

It odd the way your routing goes via a specific part of the BT network.

Are you sure the ports are not being blocked by the device connected to the home hub?

OS scan gives this result, although it may not be reliable, it may just be seeing the home hub.

Device type: specialized|general purpose|storage-misc
Running (JUST GUESSING): Crestron 2-Series (87%), Linux 4.X (85%), HP embedded (85%)
OS CPE: cpe:/o:crestron:2_series cpe:/o:linux:linux_kernel:4.0 cpe:/h:hp:p2000_g3
Aggressive OS guesses: Crestron XPanel control system (87%), Linux 4.0 (85%), HP P2000 G3 NAS device (85%)
No exact OS matches for host (test conditions non-ideal).
Uptime guess: 0.043 days (since Fri Oct 01 18:39:23 2021)
Network Distance: 9 hops