Ngrok errors '502 bad gateway'

Question

Quite new to using any sort of Web App stuff, and I\'ve been trying to slowly build a Facebook Messenger Bot. When I try to use ngrok I can\'t visit the address I\'m given,

Answer 1

This worked for me

ngrok.exe http -host-header=rewrite localhost:

e.g ngrok.exe http -host-header=rewrite localhost:5219

Im using visual studio 2017 dont know if it effects anthing.

Answer 2

If you just with to use ngrok to intercept incoming data, and you do not have a local webserver for whatever reason, then you can use ncat.

nc -l 5000

This will create a process that listens on port 80.

So when used in combination with

ngrok http 5000

You will no longer get the '502 bad gateway' error.

Answer 3

I had to put my server ip address and works perfect!

./ngrok http [ip server]:5000

Answer 4

Step 1 - Register to ngrok and download .exe file in dashboard page

Step 2 - Open terminal and copy & paste from the dashboard the line without ./

Step 3 - run your localhost

Step 4 - If step 2 was successfully done, paste in the same terminal (step 2) the line with your localhost port

ngrok http https://localhost:44386 -host-header="localhost:44386"

Step 5 - Copy the URL generated in the terminal and waalla.. you can ping to it.

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In case of <<<<Ngrok errors '502 bad gateway'>>>> change https into http so the Step 4 will be ngrok http http://localhost:44386 -host-header="localhost:44386"

Answer 5

It seems that this issue has now been resolved in the latest version of ngrok: https://github.com/inconshreveable/ngrok/issues/448

Basically, what you do is to specify that you are using https like this:

ngrok http https://localhost:54321 -host-header="localhost:54321"

At least, this resolved the issue for me. Replace 54321 with your actual port number.

Answer 6

502 gateway error occurs because ngrok not able to receive any reponse from Localhost.

The things need to be done is :

1. Start a webserver in a Port
2. Trigger ngrok command in that Port.

What I have done is

• Started a tomcat Web Server in 8080.
• Then Triggered ngrok http 8080.

It works really cool ...
Try this .....
Hope it works for You .