Heroku has "private spaces" which will give you a fixed set of outbound IPs, AWS VPC peering, and a firewall via Trusted IP Ranges. Heroku is surprisingly nice

Heroku has "private spaces" which will give you a fixed set of outbound IPs, AWS VPC peering, and a firewall via Trusted IP Ranges. Heroku is surprisingly nice as an enterprise customer. https://devcenter.heroku.com/articles/private-spaces#stable-outbound-ip-addresses https://devcenter.heroku.com/articles/private-spaces#stable-...