Select the 'Transport' tab then the 'use specified ports' radio button and 'RTSP Settings'.The following tip has helped many users who are in corporate environments:

If you can determine that there is a firewall issue, you will need to contact your local technical support or network administrator to request that restrictions on the firewall be modified. If you are having problems connecting to RealMedia content from a corporate/office location, you may be encountering a firewall that is preventing you from accessing them. Please visit the RealPlayer support page at Problems watching RealVideo (and hearing RealAudio) content? The links on the third row of the video and audio section of the page will verify if your player is configured to receive the content found at this site. Visit this page for a series of links that will help check the setup of your RealPlayer. For Apple Macintosh users, we recommend using a computer that is running OS 9 or later. For PC users, we recommend using a computer that is running Windows 98, or a more recent version of Microsoft Windows. Multimedia files, such as the ones used in this site can put a considerable demand on your computer. Operating system recommendations for optimal video viewing RealPlayer (download link for the free 'Basic Player' version is on the right side of the page as of Dec.

You can get the free RealPlayer at this link: All needed functions are available in the basic version. The web content available here can be played with the most basic version of RealPlayer. To view this streaming media content, you should have RealPlayer version 8 or later installed on your computer. Help for RealMedia Streaming Help with Streaming Media using RealPlayer RealPlayer requirements

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