Ssh and http failed to connect with tailscale

1

Hi! I meet a strange problem. I can ping and use the Nomachine program(a remote desktop sharing program with NX protocol) with tailscale. However, I cannot use ssh or http server with tailscale.
I have 2 devices: 1 Windows laptop(Windows11 21H2) and 1 Linux desktop(Ubuntu 20.04.5). I can ping from my Windows to Ubuntu but I cannot use ssh or HTTP service(I run an Nginx server on my Ubuntu.)
The ping tailscale ping ubuntu result is like this:

pong from ubuntu (100.xx.xx.xx) via xx.xx.xx.xx:xxxxx in 70ms

Here’s the ssh command tailscale ssh username@ubuntu and the error be like:

Dial(“xxxx.tailaa36d.ts.net.”, 22): unexpected HTTP response: 502 Bad Gateway, dial failure: dial tcp 100.xx.xx.xx:22: connectex: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.
kex_exchange_identification: Connection closed by remote host

I can directly use the sshd and nginx from Windows when under the same LAN, so these two services probably have no errors. I can use Nomachine from Windows to Ubuntu with tailscale, so the connection provided by tailscale is also usable. However, the connection from ssh or http always fails.
I’m a new tailscale user and I use the default tailscale settings. I wonder if I should change some of the tailscale settings. Besides, is it possible to check the full connection error logs for tailscale? Thanks.

2

Did you enable tailscale ssh?

Also check if your http server is bound to 0.0.0.0 and not to 127.0.0.1 or the LAN interface.

You can use netstat -tuplen to check this.

3

Thanks for your reply!
I’m not so familiar with tailscale and didn’t enable tailscale earlier. The ssh service works fine now. After checking the ip address of my http server, I found the main problem comes from the traffic from 100.xx.xx.xx to port 80 beings blocked by the firewall.
My problem is solved now and thanks for your help.

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