> ## Documentation Index
> Fetch the complete documentation index at: https://ngrok.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Error 1117

## ERR\_NGROK\_1117

Cannot request a random port with a custom bind address `ADDR` in '-R `ADDR`:0:'.
You may either specify a reserved TCP address with '-R address:port:' or you may let the server choose a random remote port for you with '-R 0:'.

Example: ssh -R 0:localhost:22 ...
Example: ssh -R 1.tcp.eu.ngrok.io:21412:localhost:22 ...

## Further help

If you're having trouble resolving this error, please reach out to [support@ngrok.com](mailto:support@ngrok.com?subject=Help%20with%20ERR_NGROK_1117)