Is it possible to whitelist Heroku apps?
heroku, whitelist
Solution
Answering my own question. Even though an external VPN or the proximo addon are a solution in case you want to whitelist a Heroku app, I have decided to go for the simpler option and host the SMPP binding service of my app on ec2 using an Elastic IP
Problem
I have a Heroku application that binds with a telco sms gateway via SMPP The telco guys need to whitelist IPs for my app to connect. I am aware of the new addon proximo, but it's just insanely priced. So that option is out. Is there a subnet or a list of IPs that I can get whitelisted and is there a guarantee that all requests from my app will originate from tose IPs? I found this https://api.heroku.com/vendor/logplex/allowlist. Is that only for syslog or all apps make a request from one of those IPs? Thanks