| Author |
Message |
C Tate
Guest
|
 Posted:
Thu May 06, 2004 1:56 am Post subject:
No audio/video |
|
|
I have been trying to use Netmeeting (3) to talk to other parties. They can
see me but I can't see them. In addition they cannot dial me up if I give
them my IP address.
I cannot to the Internet using a BT Yahoo broadband connection so I do have
an external modem. My connection is wireless so I also have a wireless
router.
I am able to change the configuration of my router/modem etc as this is my
own personal PC.
I am a bit confused by my IP address. It doesn't change every time I log on;
it's always something like 192.168.etc.etc.etc.
Having read a few posts it sounds as though this router and my funny IP
address may be causing the problem?!
Is there anything I can try to get things working?
I am a bit of a beginner to all this so no over technical jargon please!
Idiot style answers are most appreciated!! |
|
| Back to top |
|
 |
Brian Sullivan MVP
Guest
|
| Posted:
Thu May 06, 2004 5:23 am Post subject:
Re: No audio/video |
|
|
C Tate wrote:
| Quote: | I have been trying to use Netmeeting (3) to talk to other parties.
They can see me but I can't see them. In addition they cannot dial me
up if I give them my IP address.
I cannot to the Internet using a BT Yahoo broadband connection so I
do have an external modem. My connection is wireless so I also have a
wireless router.
|
The NAT router would be the cause of your symptoms. You are almost surely at
a private unreachable IP -- and thus cannot be called. The NAT also would
cause you to have no incoming audio or video.
| Quote: |
I am able to change the configuration of my router/modem etc as this
is my own personal PC.
|
It is possible that you could modify the router so that you are the dmz
machine ( assuming that the broadband modem is not also a NAT).
Being the dmz client should allow you to have incoming audio/video and to
handle incoming calls made directly to wan IP of the router ( assuming it is
not also behind a NAT). A software firewall on the dmz machine is a
neccessity.
| Quote: |
I am a bit confused by my IP address. It doesn't change every time I
log on; it's always something like 192.168.etc.etc.etc.
|
The IP address is a private IP assigned by your router. Usually routers tend
to assign the same IP to the same client.
| Quote: |
Having read a few posts it sounds as though this router and my funny
IP address may be causing the problem?!
|
Yes.
| Quote: |
Is there anything I can try to get things working?
I am a bit of a beginner to all this so no over technical jargon
please! Idiot style answers are most appreciated!!
|
You would have to read your router documentation to determine how to set up
the dmz client.
--
Brian Sullivan
Meeting by Wire ( http://www.meetingbywire.com)
------------
Is your PC protected? --
http://www.microsoft.com/security/protect/default.asp |
|
| Back to top |
|
|
C Tate
Guest
|
| Posted:
Thu May 06, 2004 10:05 am Post subject:
Re: No audio/video |
|
|
Many thanks for these helpful comments. I have a few more questions which I
hope you can answer!
1) What happens if the modem is also behind a NAT?
2) Assuming I modify the router to make myself the dmz machine, does this
mean my IP address will change in future or will it always stay the same?
3) Does making myself the dmz have any security implications?
The whole procedure sounds so long-winded just to get netmeeting working!!!
How come so many people seem to be using without problems these days? Nearly
everybody is on broadband so surely everybody must be having this problem?!!
Maybe other parties are all using dial-up?!
"Brian Sullivan MVP" <brians@WORMTIREDmeetingbywire.com> wrote in message
news:%23G7XEjwMEHA.1468@TK2MSFTNGP12.phx.gbl...
| Quote: | C Tate wrote:
I have been trying to use Netmeeting (3) to talk to other parties.
They can see me but I can't see them. In addition they cannot dial me
up if I give them my IP address.
I cannot to the Internet using a BT Yahoo broadband connection so I
do have an external modem. My connection is wireless so I also have a
wireless router.
The NAT router would be the cause of your symptoms. You are almost surely
at
a private unreachable IP -- and thus cannot be called. The NAT also would
cause you to have no incoming audio or video.
I am able to change the configuration of my router/modem etc as this
is my own personal PC.
It is possible that you could modify the router so that you are the dmz
machine ( assuming that the broadband modem is not also a NAT).
Being the dmz client should allow you to have incoming audio/video and to
handle incoming calls made directly to wan IP of the router ( assuming it
is
not also behind a NAT). A software firewall on the dmz machine is a
neccessity.
I am a bit confused by my IP address. It doesn't change every time I
log on; it's always something like 192.168.etc.etc.etc.
The IP address is a private IP assigned by your router. Usually routers
tend
to assign the same IP to the same client.
Having read a few posts it sounds as though this router and my funny
IP address may be causing the problem?!
Yes.
Is there anything I can try to get things working?
I am a bit of a beginner to all this so no over technical jargon
please! Idiot style answers are most appreciated!!
You would have to read your router documentation to determine how to set
up
the dmz client.
--
Brian Sullivan
Meeting by Wire ( http://www.meetingbywire.com)
------------
Is your PC protected? --
http://www.microsoft.com/security/protect/default.asp
|
|
|
| Back to top |
|
|
Brian Sullivan MVP
Guest
|
| Posted:
Thu May 06, 2004 4:56 pm Post subject:
Re: No audio/video |
|
|
C Tate wrote:
| Quote: | Many thanks for these helpful comments. I have a few more questions
which I hope you can answer!
1) What happens if the modem is also behind a NAT?
|
With some DSL providers the modem is also a NAT. In that case you would have
to contact the DSL provider ( assuming they provided the modem) and talk to
them about getting a unNAT'ed connection.
| Quote: | 2) Assuming I modify the router to make myself the dmz machine, does
this mean my IP address will change in future or will it always stay
the same?
|
You would have to clarify what you men by "my IP" in this case. You could
cause the local ( to the computer) IP to be fixed but that would still be a
private unreachable IP. The public IP (the WAN IP of the router) would
change based on the ISP's strategy for handing out IPs -- it may change
deliberately on every connection or it the ISP could attempt to make it
static - only changing occasionally when network reconfiguration has taken
place.
| Quote: | 3) Does making myself the dmz have any security
implications?
|
Yes -- the dmz machine is exposed ot network traffic and should be running a
software firewall.
| Quote: |
The whole procedure sounds so long-winded just to get netmeeting
working!!! How come so many people seem to be using without problems
these days?
|
Broadband router usage is very common you are correct. And lots of people do
have problems -- a very large percentage of the posted problems here are
around using NetMeeting with NATs.
| Quote: | Nearly everybody is on broadband so surely everybody must
be having this problem?!! Maybe other parties are all using dial-up?!
|
I doubt your "nearly everybody is on broadband" statement is correct.
Certainly though in N.A. the number of cable/dsl users is quite high.
Being "on broadband" does not imply that the user is behind a NAT. In fact
judging by the numbers of broadband users that are infected by various worms
a very large number are not using routers or software firewall of any kind.
--
Brian Sullivan
Meeting by Wire ( http://www.meetingbywire.com)
------------
Is your PC protected? --
http://www.microsoft.com/security/protect/default.asp |
|
| Back to top |
|
|
C Tate
Guest
|
| Posted:
Thu May 06, 2004 8:11 pm Post subject:
Re: No audio/video |
|
|
Thanks again for your very helpful and comprehensive reply. Perhaps the
final thing I would ask is whether you would recommend an alternative to
Netmeeting for Video Conferencing to avoid some of these very complex
issues?!!!!
"Brian Sullivan MVP" <brians@WORMTIREDmeetingbywire.com> wrote in message
news:%23hUsXm2MEHA.3668@TK2MSFTNGP11.phx.gbl...
| Quote: | C Tate wrote:
Many thanks for these helpful comments. I have a few more questions
which I hope you can answer!
1) What happens if the modem is also behind a NAT?
With some DSL providers the modem is also a NAT. In that case you would
have
to contact the DSL provider ( assuming they provided the modem) and talk
to
them about getting a unNAT'ed connection.
2) Assuming I modify the router to make myself the dmz machine, does
this mean my IP address will change in future or will it always stay
the same?
You would have to clarify what you men by "my IP" in this case. You could
cause the local ( to the computer) IP to be fixed but that would still be
a
private unreachable IP. The public IP (the WAN IP of the router) would
change based on the ISP's strategy for handing out IPs -- it may change
deliberately on every connection or it the ISP could attempt to make it
static - only changing occasionally when network reconfiguration has taken
place.
3) Does making myself the dmz have any security
implications?
Yes -- the dmz machine is exposed ot network traffic and should be running
a
software firewall.
The whole procedure sounds so long-winded just to get netmeeting
working!!! How come so many people seem to be using without problems
these days?
Broadband router usage is very common you are correct. And lots of people
do
have problems -- a very large percentage of the posted problems here are
around using NetMeeting with NATs.
Nearly everybody is on broadband so surely everybody must
be having this problem?!! Maybe other parties are all using dial-up?!
I doubt your "nearly everybody is on broadband" statement is correct.
Certainly though in N.A. the number of cable/dsl users is quite high.
Being "on broadband" does not imply that the user is behind a NAT. In fact
judging by the numbers of broadband users that are infected by various
worms
a very large number are not using routers or software firewall of any
kind.
--
Brian Sullivan
Meeting by Wire ( http://www.meetingbywire.com)
------------
Is your PC protected? --
http://www.microsoft.com/security/protect/default.asp
|
|
|
| Back to top |
|
|
Brian Sullivan MVP
Guest
|
| Posted:
Thu May 06, 2004 9:32 pm Post subject:
Re: No audio/video |
|
|
C Tate wrote:
| Quote: | Thanks again for your very helpful and comprehensive reply. Perhaps
the final thing I would ask is whether you would recommend an
alternative to Netmeeting for Video Conferencing to avoid some of
these very complex issues?!!!!
|
Nothing comes to mind.
Any client to client program would have a problem having incoming calls to
users behind NATs. One potential solution to that is using a strategy like
Messenger that is built around something called UPnP NAT traversal. That
requires not only clients that support the strategy ( like Messenger) but
also implementation in the NAT itself. A growning number of residential
gateway products have this support but not many enterprise/corporate
products. Even in the residential space the support can be spotty.
Any program supporting H.323 (like NetMeeting) has the additional problem of
calls not having incoming audio/video, requiring an H.323 gatekeeper/gateway
to solve the problem for multiple users on the lan ( and to possibly provide
incoming call support.
NATs are a problem for many peer to peer programs ( like games, audio/video
telephony, media sharing) -- every program seems to have a proprieatary or
hard to implement solution to the problem.
--
Brian Sullivan
Meeting by Wire ( http://www.meetingbywire.com)
------------
Is your PC protected? --
http://www.microsoft.com/security/protect/default.asp |
|
| Back to top |
|
|
Neil Smith [MVP Digital M
Guest
|
| Posted:
Thu May 06, 2004 9:44 pm Post subject:
Re: No audio/video |
|
|
Jmeeting (www.jmeeting.com) works quite well as a video overlay to IRC
Cheers - Neil
On Thu, 6 May 2004 17:11:13 +0100, "C Tate"
<colin@nobodyhere.mrcrtate.fsnet.co.uk> wrote:
| Quote: | Thanks again for your very helpful and comprehensive reply. Perhaps the
final thing I would ask is whether you would recommend an alternative to
Netmeeting for Video Conferencing to avoid some of these very complex
issues?!!!! |
|
|
| Back to top |
|
|
|
|
|
|
FAQ
Memberlist
Register
Profile
Log in to check your private messages
Log in