Unable to ssh into remote Linux by ngrok

linux ssh tcp ngrok
ddzzbbwwmm picture ddzzbbwwmm · Jun 1, 2015 · Viewed 29.4k times · Source

The remote Linux computer is in an internal network and has no public IP address. So I installed ngrok.

ngrok tcp 22

ngrok by @inconshreveable (Ctrl+C to quit) Tunnel Status online
Version 2.0.19/2.0.17
Web Interface http://127.0.0.1:4040
Forwarding tcp://0.tcp.ngrok.io:36428 -> localhost:22
Connections ttl opn rt1 rt5 p50 p90
0 0 0.00 0.00 0.00 0.00

I checked that sshd is running.

At the local PC, I tried 

ssh [email protected] -p36428

which gave rise to

ssh: connect to host ngrok.com port 36428: Connection refused

Answer

lsowen picture lsowen · Jun 1, 2015

You are connecting to the wrong destination address. The command should be

ssh [email protected] -p36428

Notice the different hostname (ie 0.tcp.ngrok.io instead of ngrok.com).

And generally you would want to put the user@hostname after all the options (eg -p36428), even though it doesn't generally cause any issues.

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