Re: [GnomeMeeting-list] Connection Problem

[Damien Sandras <dsandras seconix com>]

On Sat, May 11, 2002 at 07:15:41PM +0100, Scott Mackenzie wrote:
> Thanks for your info, however I feel I should have added something - its
> not just over the LAN, but the same happens over the Internet also.
> 
> Exactly the same thing - I've opened the ports on our firewall - for the
> UDP data transfer (5000+) and 1720 for the connection establishment, but
> again it connects for a a second or so, but this time (probably due to
> our Internet connection), it doesn't quite get time to send the first
> pictures before cutting off.

if you are using it agains Netmeeting, you also need to open a random TCP port one
the firewall for H.245. Only GnomeMeeting to GnomeMeeting connectiosn permit to
do H.245 tunneling and to spare that random port. (It is opened from the caller to
the called machine).

Moreover the current NAT module for Linux doesn't support H.245 Tunneling.

> 
> I've also downloaded gnome-meeting, and recompiled it, and the same
> happens.
> 
> It must be something I've done wrong, since its working for most other
> people; but I can't put my finger on it..?
> 
> There is no firewall also.
> 
> > Here are a few tips :
> > - check that you have the same effect in QCIF mode (Choose small as size for
> > video)
> > - check that you have no firewall rule on the Redhat (iptables -L)
> > - currently, GnomeMeeting is sending MS-GSM to Netmeeting XP (I guess that
> > either you installed it, either it is now provided in Netmeeting XP), but
> > the Netmeeting is sending G.711. Try to configure the Netmeeting so that
> > it sends MS-GSM too.
> 
> I did this - as much as net meeting allowed.
> 
> Again, here is the info when connecting to the Internet client:
> 
> 18:46:14 :  Opening Video device
> 18:46:14 :  Successfully opened video device /dev/video0, channel 0
> 
> 19:01:35 :  Call 1: calling 194.102.155.13
> 19:01:38 :  Started New Logical Channel...
> 19:01:38 :  Sending GSM-06.10{sw}
> 19:01:38 :  Enabled silence detection for GSM-06.10{sw}
> 19:01:38 :  Started New Logical Channel...
> 19:01:38 :  Sending H.261-QCIF
> 19:01:38 :  Fast start disabled
> 19:01:38 :  H.245 Tunnelling enabled
> 19:01:38 :  Connected with Endre [194.102.155.---] using
> gnomemeeting	0.85.1	9:0:61
> 19:01:38 :  Started New Logical Channel...
> 19:01:38 :  Receiving H.261-QCIF
> 19:01:38 :  Requesting remote to send video quality: 75%
> 19:01:41 :  Request ok
> 19:01:41 :  Call completed
> 19:01:41 :  Opening Video device
> 19:01:41 :  Successfully opened video device /dev/video0, channel 0
> 
> 
> <<I changed the IP, basically because I've not asked permission to post
> his IP to a mailing list>>
> 
> Thanks again.
> Scott.
> 
> 
> On Sat, 2002-05-11 at 05:36, Damien Sandras wrote:
> > On Sat, May 11, 2002 at 12:43:45AM +0100, Scott Mackenzie wrote:
> > > Hi, I've just installed the latest redhat 7.3 kernel (2.4.18-4) and its
> > > got my webcam working.  I've been playing with gnomemeeting (bundled
> > > version with Redhat 7.3) for about an hour now, and I have a bit of a
> > > problem.
> > > 
> > > (by the way, its a full install of 7.3, and all the gnomemeeting
> > > programs are installed)
> > > 
> > > I'm testing this over a LAN from a linux box to a WinXP box with
> > > netmeeting 3.01.  When the XP box didn't have a webcam attached I could
> > > connect from gnomemeeting no problems, and on the XP box it would
> > > display the view from the webcam connected to the linux system.  No
> > > matter which way the connection was established -- linux to XP, or visa
> > > versa it would work perfectly.
> > 
> > perfect :)
> > 
> > > 
> > > Next I connected a webcam to the XP box, and installed it correctly. 
> > > Anyway the webcam worked on the XP box itself, but now when I connect
> > > using gnomemeeting (either directions -- XP to windows and other the
> > > way), it doesn't work correctly.
> > > 
> > > What happens is the call goes through fine however it only stays
> > > connected for about half a second, and I get about the first image from
> > > each webcam on each system, then the connection is cut.
> > > 
> > 
> > That is obviously not normal, on LAN. It can happen if too many packets are lost.
> > 
> > > 
> > > I ran gnomemeeting in debug mode, and here are some main debug messages:
> > > 
> > > 
> > > 
> > >  0:17.395	    H225 Caller:815d670	H225	Handling PDU: ReleaseComplete
> > > callRef=21952
> > >   0:17.395	    H225 Caller:815d670	H323	Clearing connection
> > > ip$localhost/21952 reason=EndedByRemoteUser
> > >   0:17.395	    H225 Caller:815d670	H323	Call end reason for
> > > ip$localhost/21952 set to EndedByRemoteUser
> > >   0:17.395	    H225 Caller:815d670	H323	Clearing connection
> > > ip$localhost/21952 reason=EndedByTransportFail
> > >   0:17.395	    H225 Caller:815d670	H225	Signal channel closed.
> > >   0:17.396	           H323 Cleaner	H323	Cleaning up connections
> > 
> > 
> > First of all, I have to congratulate you for the precision of your message.
> > The messages indicates that the Netmeeting for XP cleared itself the connection
> > (EndedByRemoteUser) because there was a transport error (EndedByTransportFail).
> > 
> > As you are telling me that it happens directly when you are connecting
> > the Netmeeting to the GnomeMeeting, and as you are telling me that it works
> > when GnomeMeeting sends video, I would suppose that the Netmeeting can't open
> > the video stream to the GnomeMeeting and then decides to close the connection.
> > 
> > Here are a few tips :
> > - check that you have the same effect in QCIF mode (Choose small as size for
> > video)
> > - check that you have no firewall rule on the Redhat (iptables -L)
> > - currently, GnomeMeeting is sending MS-GSM to Netmeeting XP (I guess that
> > either you installed it, either it is now provided in Netmeeting XP), but
> > the Netmeeting is sending G.711. Try to configure the Netmeeting so that
> > it sends MS-GSM too.
> > 
> > I have no other idea, but I guess that the problem is on the Netmeeting side.
> > If you want to confirm that the GnomeMeeting setup is ok, you can go on
> > irc.gnome.org, #gnomemeeting and ask for a live test with somebody present.
> > 
> > Thanks
> > 
> > 
> > Damien
> > _______________________________________________
> > Gnomemeeting-list mailing list
> > Gnomemeeting-list gnome org
> > http://mail.gnome.org/mailman/listinfo/gnomemeeting-list
> 
> 
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