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blocking real player ports

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5 replies

by natcat

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I have a frame relay setup to one of my office sites that has suddenly started moving at snails pace.
On a trip there I realised that one of the users has real player using a online radio station.
I've asked him to turn it off for a few hours so Ican trouble shoot the slow connection problem.
And I'd like to ensure that its not an issue by blocking the port it comes in on.
Does anyone know what that is ?

5 replies

by d.walker5

Real Player ports are:
RTSP Port 554 for Real Server
PNM Port 7070 for Real Networks Protocol Server

by mshavrov

We have experiencing the same problem. One thing you can do is block following ports:

554 (RTSP)
1755 (Streaming ASF)
7070 (RealServer)

But this will cut only 25-30% of traffic. I have discovered that many "Online Radio" use port 80 (They just specify that it's Streaming Audio), or even random ports. Only thing that may prevent this - use some kind of Proxy Server with URL filters, which will kill all requests for MP3, ASF, RA, etc. files. Or just enable outbound requests to "very necessary" ports (SMTP, HTTP/HTTPS, FTP, etc. and deny everything else). But it may be painfull. We also have Web Filtering Server (SuperScout), but sometimes it does not help too. And finally, what I'm doing - when I detect IP address of RadioStation, I just block that IP address. Sure it's far not best way, but I found it most effective.

Good luck.

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