I'm posting this so that others with the same problem can fix it. I had an issue where I was trying to post data from my php script via cURL to an external website. The post data wasn't getting to its destination. Here's what I found, thanks to the wonderful help of the KnownHost support team: -Enable the cURL extension (not enabled by default) for PHP. -Set your firewall to allow TCP port 12046 for outgoing. This may be common sense to some, but as a newb to servers and the inner workings (but a long time web developer), I thought it might help others in the same boat. Special thanks to Kate, Diana and William of the support team. You guys rock!