| Author |
Message |
tadream
Guest
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 Posted:
Sun May 16, 2004 11:21 pm Post subject:
problems with netmeeting on win2k |
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hello everyone,
the problem i'm having with this soft is pretty common, ie. a guy sees my
feed and i neither see nor hear his. now, i use a cable connection and my ip
is 192.168... and he's got a fixed ip. i also have armor2net firewall
installed, in which netmeeting is set to pass. even if i shut it off i still
get zip on my side. has anyone ran into such problem before me? if so,
please help.
regards,
adam
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Brian Sullivan MVP
Guest
|
| Posted:
Sun May 16, 2004 11:39 pm Post subject:
Re: problems with netmeeting on win2k |
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tadream wrote:
| Quote: | hello everyone,
the problem i'm having with this soft is pretty common, ie. a guy
sees my feed and i neither see nor hear his. now, i use a cable
connection and my ip is 192.168... and he's got a fixed ip. i also
have armor2net firewall installed, in which netmeeting is set to
pass. even if i shut it off i still get zip on my side. has anyone
ran into such problem before me? if so, please help.
|
The symptom you are seeing happens on all computers behind a NAT of some
kind connecting in a NetMeeting call to a party outside of the NAT'ed LAN
you are on and is due to the nature of the H.323 protocol used for
audio/video and NAT itself. Some NAT's have built in H.323 proxy functions
to deal with this issue - most do not.
Whether you can do something about this depends on what NAT device is being
used and who controls it. If you have control of the device and it has a DMZ
feature putting the NM client in the DMZ should allow the DMZ client to have
two way audio/video.
--
Brian Sullivan
Meeting by Wire ( http://www.meetingbywire.com)
------------
Is your PC protected? --
http://www.microsoft.com/security/protect/default.asp |
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tadream
Guest
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| Posted:
Mon May 17, 2004 10:10 am Post subject:
Re: problems with netmeeting on win2k |
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thnx for help brian. would having a fixed ip solve the problem?
| Quote: | The symptom you are seeing happens on all computers behind a NAT of some
kind connecting in a NetMeeting call to a party outside of the NAT'ed LAN
|
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Version: 6.0.686 / Virus Database: 447 - Release Date: 2004-05-14 |
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Brian Sullivan MVP
Guest
|
| Posted:
Mon May 17, 2004 4:46 pm Post subject:
Re: problems with netmeeting on win2k |
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tadream wrote:
| Quote: | thnx for help brian. would having a fixed ip solve the problem?
|
If the "fixed" IP is still a private NAT'ed IP ( 192.168.x.x, 10.x.x.x,
172.16-31..x.x are private IPs). it would make no difference.
| Quote: |
The symptom you are seeing happens on all computers behind a NAT of
some kind connecting in a NetMeeting call to a party outside of the
NAT'ed LAN
|
--
Brian Sullivan
Meeting by Wire ( http://www.meetingbywire.com)
------------
Is your PC protected? --
http://www.microsoft.com/security/protect/default.asp |
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Rich Bernstein
Guest
|
| Posted:
Wed Jun 16, 2004 6:34 am Post subject:
Re: problems with netmeeting on win2k |
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Brian, could he "port foward" the netmeeting (or h.323) specific ports? It
has been awhile for me. Do you remember what ports H.323 uses? Also, if he
is setting up the call from inside the NAT to the machine not behind a NAT,
shouldn't this work? I know some commercial products have figured out a
solution.
"Brian Sullivan MVP" <brians@WORMTIREDmeetingbywire.com> wrote in message
news:OHatp0APEHA.3476@TK2MSFTNGP09.phx.gbl...
| Quote: | tadream wrote:
thnx for help brian. would having a fixed ip solve the problem?
If the "fixed" IP is still a private NAT'ed IP ( 192.168.x.x, 10.x.x.x,
172.16-31..x.x are private IPs). it would make no difference.
The symptom you are seeing happens on all computers behind a NAT of
some kind connecting in a NetMeeting call to a party outside of the
NAT'ed LAN
--
Brian Sullivan
Meeting by Wire ( http://www.meetingbywire.com)
------------
Is your PC protected? --
http://www.microsoft.com/security/protect/default.asp
|
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Brian Sullivan MVP
Guest
|
| Posted:
Wed Jun 16, 2004 6:50 am Post subject:
Re: problems with netmeeting on win2k |
|
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Rich Bernstein wrote:
| Quote: | Brian, could he "port foward" the netmeeting (or h.323) specific
ports? It has been awhile for me. Do you remember what ports H.323
uses?
|
H.323 uses tcp 1720 for setup but a set of negotiated UDP ports in the
32767 -65536 range so forwarding is not a solution. The solution most often
used is to use the dmz feature of the router ( which forwards all
*unsolicited* traffic to the dmz client).
| Quote: | Also, if he is setting up the call from inside the NAT to the
machine not behind a NAT, shouldn't this work?
|
No even then an H.323 gateway or proxy is required.
| Quote: | I know some commercial
products have figured out a solution.
|
I am nor sure what commercial products you are referring to. The only
solution for H.323 that I know of is an H.323 gateway ( often with a
gatekeeper) of some kind. Some ( usually older) routers have a built in
H.323 gateway
--
Brian Sullivan
Meeting by Wire ( http://www.meetingbywire.com)
------------
Is your PC protected? --
http://www.microsoft.com/security/protect/default.asp |
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