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Application Server IPs & EC2 configuration

If you need to use external services that are located behind a firewall you'll need to open your firewall/security groups to allow access from our application servers. This is necessary as we may move your application to a different server at any time.

External IP ranges This list will be updated continuously so please check it every once in a while to make sure your firewall or security groups is set up correctly. The IPs that needs to be added depends on your app's region:

US region IPs:

  • (CIDR
  • (CIDR

EU region IPs:

  • - (CIDR

Security groups and AWS RDS

Important: Security group based access rules in the same AWS region are no longer supported. Instead we recommend that you add the IP ranges listed above for your AWS security groups to allow access from AppHarbor IPs.