Re: Proxying Real-Audio

From: Nigel Metheringham <>
Date: Tue, 30 Dec 1997 13:06:37 +0000 said:
} Progressive Networks implemented an application-layer proxy for
} RealAudio using the TIS Firewall Toolkit. I'm running it on my
} system, and it works just fine. Check and browse
} through the links to locate the source code.

} Newer versions of the RAplayer will work through HTTP proxies, which
} would allow Squid to cache the clips.

In general this is not true.

There is a very restricted way of using RA which would allow squid to
cache the files, but people don't use that mode.

As for squid proxying RA, it shouldn't. squid should do a great job of
proxy/caching www content. It should not do a mediocre job of providing
general firewall functionality.

The RA firewall proxy kit is available from progressive networks. Its a
good set of documentation plus a couple of examples, and is sufficient to
write a proxy - that documentation is what I used to produce the Linux IP
masq code. It is not sufficient to write a cache function - that would
require a better knowledge of the control protocol and also something
about the data protocol (which you need not know about for the proxy
functions). PN do not give that data away - I wish luck to anyone
attempting to reverse engineer that protocol info :-)


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Received on Tue Dec 30 1997 - 02:00:00 MST

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