tag:support.appharbor.com,2010-11-23:/discussions/problems/93582-twilio-apiAppHarbor: Discussion 2017-11-16T09:18:34Ztag:support.appharbor.com,2010-11-23:Comment/440475412017-11-16T09:18:32Z2017-11-16T09:18:32ZTwilio API <div><p>Hi,</p>
<p>No there's no special configuration to contact external services, but depending on the service you may need to allow access from AppHarbor's servers. I don't think that'd be necessary with a default Twillio setup, but you can <a href="https://support.appharbor.com/kb/tips-and-tricks/application-server-ips-ec2-configuration">find more information in this KB article</a> if you need to whitelist some IPs/servers/security groups at some point.</p>
<p>I hope this helps, but let me know if you experience issues setting this up and I'll be happy to take a closer look!</p>
<p>Best,<br>
Rune</p></div>rune