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<H2>Streaming Proxy ReadMe</H2>

<P>The Darwin Streaming Proxy is an application-specific proxy which
would normally be run in a border zone or perimeter network. It is
used to give client machines within a protected network access to
streaming servers outside that network, in the case when the firewall
blocks RTSP connections or RTP/UDP data flow. The firewall perimeter
network is usually configured to allow:</P>

<UL>
   <LI>RTSP connections from within the network, as long as the
   destination is the proxy </LI>
   
   <LI>RTSP connections to outside the network, as long as the source
   is the proxy</LI>
   
   <LI>RTP datagrams to and from the proxy to the inner network</LI>
   
   <LI>RTP datagrams to and from the proxy to the outside</LI>
</UL>

<P>The proxy usually sits within the perimeter network, between an
'inner skin' and 'outer skin', which have different configurations,
of course, to allow the flows above.</P>

<P>Note that RTSP runs over TCP; the normal connection port is 554
(but see below). Note that if the URL supplied by the client to the
proxy includes a port number, then the proxy will attempt to connect
to the server using that port number rather than the default 554.</P>

<P>RTP runs over UDP, and a range of ports may be used. Client-side
ports are usually in a restricted range (starting at 6970), but
servers cannot so easily restrict what ports they use. For safety, do
not restrict port number access to the proxy; use only the IP
address.</P>

<P>Note that this proxy handles standard RTSP controlling standard
RTP; RTSP can be used to control other media protocols, and is used
by a number of companies to control proprietary media protocols. This
proxy does not attempt to proxy those other protocols. For more
information on these protocols, consult the Internet Engineering Task
Force documentation:</P>

<UL>
   <LI>RTSP
   &lt;http://info.internet.isi.edu:80/in-notes/rfc/files/rfc2326.txt&gt;</LI>
   
   <LI>RTP
   &lt;http://info.internet.isi.edu:80/in-notes/rfc/files/rfc1889.txt&gt;</LI>
</UL>



<h3>License</h3>

<P>The Darwin Streaming Server and Streaming Proxy is distributed
under the terms of the Apple Public Source License. For more
information, refer to the license terms at <A HREF="http://www.publicsource.apple.com">www.publicsource.apple.com</A>.
Note that the Apple Public Source License does not allow you to use
the terms "QuickTime" or "QuickTime Streaming Server" in descriptions
of products developed using Darwin Streaming Server or Streaming
Proxy open source code, nor use any Apple trademarks or logos
associated with QuickTime and QuickTime Streaming Server.</P>



<h3>How To Use</h3>

<P>The application must reside on a machine that can see both the
Internet, and your internal network. This would be your Bastion Host,
or another machine in your Perimeter Network.</P>



<OL>
   <LI>Install the Streaming Proxy in a reasonable place on your
   machine (For example, /usr/local/sbin ).</LI>
   
   <LI>Edit the streamingproxy.conf file put place
   it in the /etc/streaming/ directory.</LI>
   
   <LI>Launch the StreamingProxy application (ie.
  <CODE> #/usr/local/sbin/StreamingProxy -c /etc/streaming/streamingproxy.conf</CODE>)</LI>
   
    <LI>Launch the StreamingProxy application using the -h command line option for a description of the other
   command line options.</LI>
   
   <LI>NOTE: You must run as root to enable the default port 554 for
   reception.</LI>

</OL>

<h3>Configuring Client Machines</h3>

<OL>
   <LI>Open the QuickTime (Win32) or QuickTime Settings (Mac) control
   panel.</LI>
   
   <LI>Select <B>Streaming Proxy</B> from the popup menu and then
   select the <B>RTSP Proxy Server</B> checkbox.</LI>
   
   <LI>Type in the ip address or domain name of your proxy server in the Name: field, and
   the port you configured in the streamingproxy.conf file (or 554 as
   a default).</LI>
</OL>


<h3>How It Works</h3>

<P>The Streaming Proxy listens on ports you specify for a RTSP
command sequence. It parses the commands and redirects the command to
the desired server. It also rewrites the RTSP commands to reflect the
new set of port numbers that the proxy must use.</P>

<P>The Streaming Proxy will only relay data that comes from a server
that the data was requested from.</P>



<h4>Credits</h4>

<P>This proxy includes software developed by the University of
California, Berkeley and its contributors; that included software is
the regular expression code developed by Henry Spencer.</P>


<P>&nbsp;</P>

<P><FONT SIZE="-1">&copy; 1999, 2000 2001 Apple Computer, Inc. All rights
reserved. Apple, the Apple logo, Mac, Macintosh, PowerBook, Power
Macintosh, and QuickTime are trademarks of Apple Computer, Inc.,
registered in the United States and other countries. iBook, iMac, and
Power Mac are trademarks of Apple Computer, Inc. All other product
names are trademarks or registered trademarks of their respective
holders.</FONT></P>


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