Requirements
Troubleshooting > Firewall :

Firewalls are a system designed to restrict Internet access from a private network (such as an Office network). Almost every company has one installed.
In order to view video content the firewall must be configured to allow Streaming Media through.
If you suspect that a firewall is preventing you from viewing content, the easiest way to check is to contact your IT department.
To use your player through a firewall, you can configure it to receive content through HTTP:
   To use Windows Media Player through a firewall,
            click here and follow the instructions.

   To use Real Player through a firewall,
            click here and follow the instructions.

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