How to use ngrok with puma-dev rails server

Question

My rails app is spin up using puma-dev on Ubuntu.

I'm using puma-dev command to start my app (in foreground) and then access the rails app using https://app.test:9283. As the puma-dev is running in the foreground I have to use the port 9283 to access the port.

Now I want to access the rails app on remote machines like a mobile device or other PC. So have to use the ngrok to do so. I have installed ngrok in my ubuntu but I'm not able to access my localhost setup running on https://app.test:9283 using ngrok. Any help would be appreciated!

NOTE: When I use ./ngrok http 80 it successfully redirects me to localhost:80 which means ngrok is working properly.

I haven't use ngrok in a couple of years, but I remember running "rails s -b 0.0.0.0" and then "ngrok http 3000", by my understand ngrok will tunnel your open port to a temp address on the port 80, so you should be going to app.test instead of app.test:3000 and the addresses were like #####.ngrok.io, you could change the port with something like "rails s -b 0.0.0.0 -p 3001" — Alexis, Sep 11 '20 at 15:29
What command are you running to start `ngrok`? It could be something like `ngrok http 9283`. — Jake Worth, Sep 11 '20 at 20:26
running `ngrok http 9283` gives me `Client sent an HTTP request to an HTTPS server.` — Tushar Bhutada, Sep 12 '20 at 09:11

score 3 · Answer 1 · answered Mar 05 '21 at 09:34

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With puma-dev it is necessary to include the -host-header argument, like so:

./ngrok http -host-header=app.test 9283

answered Mar 05 '21 at 09:34

mrt

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score 0 · Answer 2 · answered Sep 20 '20 at 13:30

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you have to bind the ngrok server with the same port as rails server ./ngrok http 9283

answered Sep 20 '20 at 13:30

Priyanka

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running `./ngrok http 9283` gives me Client sent an HTTP request to an HTTPS server. – Tushar Bhutada Sep 21 '20 at 07:13

score 0 · Answer 3 · answered Mar 05 '21 at 22:54

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You need "local-leg HTTPS."

./ngrok http https://app.test:9283

answered Mar 05 '21 at 22:54

Andrew Benton

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score 0 · Answer 4 · answered May 15 '23 at 07:20

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The only way I was able to connect to my locally running app securely was by running the next command:

ngrok http https://app.localhost --host-header app.localhost

without any ports and the https:// address before the --host-header

answered May 15 '23 at 07:20

Oleksandr Danylchenko

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How to use ngrok with puma-dev rails server

4 Answers4