I have a rails application hosted on Heroku that I need to integrate with 3rd party payments provider. The payment provider requires that my application will have a static IP for incoming and outgoing HTTPS requests. I want to deploy a proxy on a Linode VPS so it can relay the information as a proxy. Relaying the request to the service provider seems easy, I just use their IP.
Can I relay requests coming from the service provider to the heroku application? Can I relay the request using a URL (https://myapp.herokuapp.com) ?
What is the recommended proxy server to use?
It's better to look into: https://devcenter.heroku.com/articles/quotaguardstatic
If you have a credit card and the app has no much traffic (250 request and 100MB of traffic bandwidth) Quotaguard has a free starter plan (to add this to heroku heroku addons:add quotaguardstatic:starter).
Here are the plans: Quota Guard Static Plans