Cross domain scripting failure in secure environment

I am using postmessage from Ben Alman. I have 2 separate applications set up. Local - local, local - dev server (windows 2003) and dev server - dev server (different ports) all work.

Our test environment is inside PCI Compliance. One of the requirements that I thought might be an issue is that all outbound traffic is restricted. I have opened outgoing traffic on ports 80 and 443 to the external server, but still the cross domain scripting is not working.

I am just at a complete loss as to how to get this to work. It was working just fine in an environment where the two machines can see each other and communic开发者_Go百科ate freely between each other. Any ideas why the message is being "sent" but not received?

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As cross-domain communication should happen entirely in the browser no firewalls should be involved.

The plugin from Ben isn't the best one - you should instead go for easyXDM (yes, I'm the author), which is way better, much better support, much faster, and have a lot more features in general.

About the problem, it is most likely just a code error - are you for instance using the correct origin when sending messages`

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I used Conroy's solution here rather than a third party library.