Re: trouble with RealPlayer files on iPaq 1940
From: Neil Smith [MVP Digital Media] (neil_at_nospam.com)
Date: 09/05/04
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Date: Sun, 05 Sep 2004 11:07:27 GMT
On 4 Sep 2004 18:53:23 -0700, danr_18@yahoo.com (Daniel Rosenzweig)
wrote:
>Thanks...
>
>I've gone through all this before... I used a packet sniffer to see
>what ports are being used... Each time a tranfer is started, an rtsp
>conversation goes on and the client tells the server which ports to
>use. The ports you mention are only for the rtsp negotiation, not the
Yes, I didn't mention that because it's usually the first point of
failure (inability to establish a negotiation with the streaming
server)
>actual data stream. Real's site explains what goes on -- but it was
>those higher ports.... If you want to forward all the ports for
>RealPlayer, you're
>fowarding a VERY large range of ports!
OK well the only thing I can suggest really is to install a RTSP proxy
on your router. Again, freesco and most linux based routers have a
kernel module which you just activate (or install the module if
required). The proxy understands the RTSP negotiation and determines
the required ports to open and forward to the designated computer.
This (stateful router / firewall) implements the port negotiation
which you would otherwise do by adding static port ranges for
subsequent connections - as you've listed below from the real player
site.
>I even got a hold of someone who had access to the Real PocketPC
>client's sourcecode. He told me what registry settings to change...to
>specify which ports to use (the PC version has a UI screen to do it)
>it didn't work. I confirmed with him that I did it correctly. The
>problem is that he didn't have an actual PPC to test with.
Realnetworks don't really support the PPC player in any meaningful
way, so I can imagine, it's quite frustrating.
>I can't get a new router... as the router which is causing the problem
>is a VOIP router... the only one supported by my VOIP provider. Thus,
>if I change routers, I lose phone service... I could technically turn
>off the router /DHCP in the VOIP box... but speaking to the router's
>tech support - that could
Yes, well I suppose you could always DIY on the VoIP part of the
service (unless you're using voip network connected phones rather than
PCs for calls). It would give you more control in the long run.
Or, you set up two networks (subnet it) so 'normal' traffic comes into
a internet facing router, and onto your network, and the rest gets
filtered and sent over to the VoiP router. All seems a lot of work
just to watch real player videos on a PPC though !
>open up vulnerabilites in the VOIP part of the box. I've spoken to
>different levels of both tech support (provider/router) to no avail --
>other than to keep my eye out for new firmware... but they don't have
>port ranges on their future feature list yet.
>I don't remember the page I had before, but this lists which
>ports need to be opened in firewalls (PC version - at least)
>http://service.real.com/firewall/proxycfg.html
>
>I can't find the RTSP URL right now.
>====
>Click on the first RealAudio in the list and click Edit. Initial
>connection should be on port 554, type should be set to TCP out bound.
>Highlight and remove all entries in the "Port ranges for subsequent
>connections."
>Click Add, then add UDP 6970-32000 inbound and select OK.
>Clid Add, then add TCP 6970-32000 inbound and select OK.
>Click on the only remaining RealAudio in the list and click Edit.
>Initial connection should be on Port 7070 outbound, Type should be set
>to TCP.
>Highlight and remove all entries in the "Port ranges for subsequent
>connections."
>Click Add, then add TCP 6970-7170 inbound and select OK.
>Click Add again, then add UDP 6970-7170 inbound and select OK.
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