Re: [GnomeMeeting-list] [Problem]: The commucation breaks each 20 seconds

[Davi Leal <davi leals com>]

Hi Damien,


Damien Sandras wrote:
> Le dimanche 12 juin 2005 à 21:29 +0200, Davi Leal a écrit :
> > > Something has changed, but I do not know what. Probably more
> > > information from you is required to be able to debug the problem.
> >
> > I can tell you that my modem and router is a 3Com OfficeConnect Remote
> > 812, and that all port exposed in the FAQ
> > http://www.gnomemeeting.org/index.php?rub=3&pos=0&faqpage=x213.html#AEN21
> >8 are forwarded to the local IP.
>
> Are you sure that port forwarding is really required? What's the STUN
> result *without* port forwarding active?
>
> > The host has Debian GNU/Linux Sarge installed and updated.
> >
> > # ifconfig
> > eth0      Link encap:Ethernet  HWaddr 00:04:75:F0:52:AD
> >           inet addr:192.168.0.2  Bcast:192.168.0.255  Mask:255.255.255.0
> >           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
> >           RX packets:207536 errors:0 dropped:0 overruns:0 frame:0
> >           TX packets:158353 errors:0 dropped:0 overruns:0 carrier:0
> >           collisions:455 txqueuelen:1000
> >           RX bytes:73744915 (70.3 MiB)  TX bytes:15523515 (14.8 MiB)
> >           Interrupt:16 Base address:0xd000
> >
> > lo        Link encap:Local Loopback
> >           inet addr:127.0.0.1  Mask:255.0.0.0
> >           UP LOOPBACK RUNNING  MTU:16436  Metric:1
> >           RX packets:36606 errors:0 dropped:0 overruns:0 frame:0
> >           TX packets:36606 errors:0 dropped:0 overruns:0 carrier:0
> >           collisions:0 txqueuelen:0
> >           RX bytes:11135451 (10.6 MiB)  TX bytes:11135451 (10.6 MiB)
> > #
> >
> >
> > Under these conditions, SJphone works. http://www.sjlabs.com/sjp.html
> >
> > Under these conditions the Configuration Druid reports:
> >     STUN test result: Blocked.
> >
> > Let me know if you need further information.
> >
> > Any hint is welcome.
>
> SJPhone is not using the same port range as GnomeMeeting. If SJPhone
> works with STUN, and GnomeMeeting doesn't, it could be because no port
> forwarding is required. Notice that port forwarding is only required in
> case of Symmetric NAT, which couldn't be the case of the 3Com.
>
> You could also try another stun server, like stun1.vovida.org, but I
> would suggest to stick with stun.voxgratia.org. Notice also, that there
> is a known bug: if you click several times on the test button in a row,
> then it will freeze the application.


I  have realized an almost complete check plan:

1. The 3Com router has all portforwarded:
      TCP port 1720
      TCP port range [30000-30010]
      UDP port range [5000-5016]
      UDP port range [5020-5023]

   Start gnommeeting
   Click the Configuration Druid

   STUN test result: Blocked.


2. Delete the below ports
      TCP port range [30000-30010]
   Save the 3Com router state.
   Check that the forwarded ports are the right ones.
   Quit gnomemeeting
   Start gnommeeting
   Click the Configuration Druid

   STUN test result: Blocked.


3. Additionally, delete the below ports
      UDP port range [5020-5023]
   Save the 3Com router state.
   Check that the forwarded ports are the right ones.
   Quit gnomemeeting
   Start gnommeeting
   Click the Configuration Druid

   STUN test result: Blocked.


4. Additionally, delete the below ports
      UDP port range [5000-5016]
   Save the 3Com router state.
   Check that the forwarded ports are the right ones.
   Quit gnomemeeting
   Start gnommeeting
   Click the Configuration Druid

   STUN test result: Blocked.


4.1   rm -rf .gnome2/gnomemeeting


5. Finally, delete the below ports
      TCP port 1720
   Save the 3Com router state.
   Check that the forwarded ports are the right ones.
   Quit gnomemeeting
   Start gnommeeting
   Click the Configuration Druid

   STUN test result: Blocked.


6. Power off an on the 3Com.
   Check the forwarded ports.

   STUN test result: Blocked.


7. Repeat the SJPhone test.
     It works.


8. Quit gnomemeeting
   Start gnommeeting
   Click the Configuration Druid

   STUN test result: Blocked.


Note: Changing to  stun1.vovida.org  does not help.



Let me know if you need further information.

Any hint is welcome.


Davi