Real Networks Real Player

When the following combined conditions are true, Real Networks Real Player fails to stream content:

1. Content Gateway is deployed as an explicit proxy.
2. Content Gateway is the only path to the Internet.
3. User authentication is NTLM.

By default, Real Player uses the RTSP or PNA protocols to stream media, both of which bypass Content Gateway. However, when Content Gateway is the only path to the Internet, Real Player uses HTTP to transit Content Gateway. Unfortunately, Real Player doesn’t handle NTLM authentication properly and the connection fails.