Serving Streams Past Firewalls Using Port 80
If you are setting up a streaming server on the Internet and you think some of your
clients are behind firewalls that allow only web traffic, enable streaming on port 80.
With this option, the streaming server accepts connections on port 80, the default port
for web traffic, and QuickTime clients can connect to your streaming server even if they
are behind a web-only firewall. If you enable streaming on port 80, make sure you
disable any web server with the same IP address to avoid conflicts with your streaming
server.
To serve QuickTime streams over HTTP port 80:
1 In Server Admin, click QuickTime Streaming under the server in the Computers &
Services list.
2 Click Settings.
3 Click IP Bindings.
4 Select “Enable streaming on port 80.”
Important: If you enable streaming on port 80, make sure that your server is not also
running a web server, such as Apache. Running both QTSS and a web server with
streaming on port 80 enabled can cause a port conflict that results in one or both of
the servers not behaving properly.
Streaming Past Firewalls or Networks With Address Translation
The streaming server sends data using User Datagram Protocol (UDP) packets. Firewalls
designed to protect information on a network often block UDP packets. Client
computers located behind a firewall that blocks UDP packets can’t receive streamed
media. However, the streaming server also allows streaming over HTTP connections,
which allows streamed media to be viewed through even very tightly configured
firewalls.
Some client computers located on networks that use address translation may also be
unable to receive UDP packets, but they can receive media that’s streamed over HTTP
connections.
If users have problems viewing media through a firewall or via a network that uses
address translation, they should upgrade their client software to QuickTime 5 or later. If
users still have problems, their network administrators should provide them with the
appropriate settings for the streaming proxy and streaming transport settings on their
computers.
Network administrators can also set their firewall software to permit RTP and RTSP
throughput.
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