CODEWITHSUNDEEP
pythonngrokpyngrok
ClarkeFL
ClarkeFL

Reputation: 129

Multiple SSH TCP port 22 tunnels with same region

I'm currently starting a project using multiple Raspberry Pis. I have a system already in place where if the code fails, open an ssh tunnel on port 22. However, if two or more Raspberry Pis fail only one can open a tunnel on port 22 (tcp) in region 'au'. to access it via ssh

def ssh():
    ngrok.set_auth_token("MY_SECRET_TOKEN")
    conf.get_default().region = 'au'
    ssh = ngrok.connect(22, "tcp")
    ngrok_process = ngrok.get_ngrok_process()
    try:
        ngrok_process.proc.wait()
    except KeyboardInterrupt:
        ngrok.kill

I've been in touch with the support from Ngrok and they mentioned it is possible to have more than one tunnel on port 22 (tcp).

On a free plan you can only have one open ngrok "session" but you can run up to 4 tunnels through that one session. All of your tunnels could be to port 22, that would work fine. - Ngrok Support

and Possibly referring to having different port tunnels (22, 80)

yes you can open multiple tunnels in the "au" region within one session

Currently getting this error:

Traceback (most recent call last):
  File "/home/pi/main.py", line 210, in <module>
    ssh()
  File "/home/pi/main.py", line 30, in ssh
    ssh = ngrok.connect(22, "tcp")
  File "/usr/local/lib/python3.7/dist-packages/pyngrok/ngrok.py", line 245, in connect
    api_url = get_ngrok_process(pyngrok_config).api_url
  File "/usr/local/lib/python3.7/dist-packages/pyngrok/ngrok.py", line 162, in get_ngrok_process
    return process.get_process(pyngrok_config)
  File "/usr/local/lib/python3.7/dist-packages/pyngrok/process.py", line 295, in get_process
    return _start_process(pyngrok_config)
  File "/usr/local/lib/python3.7/dist-packages/pyngrok/process.py", line 465, in _start_process
    ngrok_process.startup_error)
pyngrok.exception.PyngrokNgrokError: The ngrok process errored on start: Your account is limited to 1 simultaneous ngrok client session.\nActive ngrok client sessions in region 'au':\n  - ts_1opHl3G90CmgGPiP6JM0IUpcXZM (IP)\r\n\r\nERR_NGROK_108\r\n.

Is it possible to have multiple ngrok.connect(22, "tcp") tunnels with the region 'AU' open in one session?

Upvotes: 0

Views: 823

Answers (1)

alexdlaird
alexdlaird

Reputation: 1293

Yes, this is possible with a paid ngrok account. You would simple call connect() more than once.

from pyngrok import ngrok, conf

ngrok.set_auth_token("MY_AUTH_TOKEN")
conf.get_default().region = "au"

ssh1 = ngrok.connect(22, "tcp")
print(ssh1.public_url)
ssh2 = ngrok.connect(22, "tcp")
print(ssh2.public_url)
ssh3 = ngrok.connect(22, "tcp")
print(ssh3.public_url)
ssh4 = ngrok.connect(3306, "tcp")
print(ssh4.public_url)
http1 = ngrok.connect(8080, bind_tls=True)
print(http1.public_url)
http2 = ngrok.connect(8080, bind_tls=True)
print(http2.public_url)

print(len(ngrok.get_tunnels()))

ngrok_process = ngrok.get_ngrok_process()
try:
    ngrok_process.proc.wait()
except KeyboardInterrupt:
    ngrok.kill()

The above example would result in 6 total tunnels, mixing multiple TCP tunnels (to the same and different ports) and multiple HTTP tunnels.

This will not work with a free account. Assuming your valid auth token is being successfully registered with pyngrok (maybe an issue here?), I'd send them the snippet ts_1opHl3G90CmgGPiP6JM0IUpcXZM (IP)\r\n\r\nERR_NGROK_108\r\n, as this looks like a debug code they've generated for your request. Perhaps providing this to ngrok support would help them narrow down where the issue is on their end.

Upvotes: 0

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