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Jeff Gaines
Guest
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 Posted:
Thu Aug 11, 2005 9:29 pm Post subject:
NetMeeting Through a NAT Router? |
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Apologies if this is a FAQ, I have down-loaded and read the last 300
messages in the group (back to April) and have seen odd references but
nothing definitive.
I am running NM 3.01 on XP Home SP2, connected to the Internet through
a Draytek Vigor 2600G.
I have re-directed ports 1503, 1720 and 1731 (TCP) to the local PC and
opened all ports from 1024 to 65535 (UDP), which worries me a bit.
Windows firewall is disabled but I am running Kerio Personal Firewall,
NM is 'authorised' by Kerio.
I can receive incoming incoming calls and sound, sharing etc. all work.
When I make an outgoing call the person at the other end can hear me
but I can't hear him. He also has Kerio running and it shows my call as
originating from 192.168.1.14, not very helpful to his copy of NM :-(
If I put my PC in the DMZ on the Draytek everything works fine, but I
would rather just open the ports that are needed rather than opening
everything up.
I have Googled and read several articles, they range from easy peasy
just open a few ports to it's impossible don't try.
I have also asked Drayek (no response so far) why the router is sending
out an internal IP address, I don't know enough (anything) about NAT to
even know if this was a sensible question.
Any suggestions or pointers to guides would be very much appreciated,
we use NM for support amongst a small group of us so getting it working
with calls in both directions would be really useful!
Many thanks.
--
Jeff Gaines - Damerham Hampshire UK
Using XanaNews 1.17.5.9 |
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Brian Sullivan
Guest
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| Posted:
Fri Aug 12, 2005 12:21 am Post subject:
Re: NetMeeting Through a NAT Router? |
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On 11 Aug 2005 16:29:40 GMT, Jeff Gaines wrote:
| Quote: | Apologies if this is a FAQ, I have down-loaded and read the last 300
messages in the group (back to April) and have seen odd references but
nothing definitive.
I am running NM 3.01 on XP Home SP2, connected to the Internet through
a Draytek Vigor 2600G.
I have re-directed ports 1503, 1720 and 1731 (TCP) to the local PC and
opened all ports from 1024 to 65535 (UDP), which worries me a bit.
|
The recommended strategy is to use the dmz feature of the router -- that
forwards all unsolicited traffic so the number of redirected ports is
larger but it is logistically easier to manage.
If your router has a built in h.323 proxy (a few older models did) -- only
tcp 1503 and 1720 need be forwarded. You could try without forwarding the
udp ports
| Quote: |
Windows firewall is disabled but I am running Kerio Personal Firewall,
NM is 'authorised' by Kerio.
I can receive incoming incoming calls and sound, sharing etc. all work.
|
Presumably these are calls made to the wan IP of the router?
| Quote: |
When I make an outgoing call the person at the other end can hear me
but I can't hear him.
|
That is the usual situation with NAT interference(I assume that you also
get no incoming video?) -- I suggest you use the dmz strategy instead of
the port forwarding that you are trying. I can't tell you exactly what the
problem is but
| Quote: | He also has Kerio running and it shows my call as
originating from 192.168.1.14, not very helpful to his copy of NM :-(
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I presume this user is not on the same network? This is not usual -- this
must be something your router is doing ( or not doing) -- and perhaps the
root cause of your problem.
Does the Kerio firewall somehow interact with the router?
| Quote: |
If I put my PC in the DMZ on the Draytek everything works fine, but I
would rather just open the ports that are needed rather than opening
everything up.
|
It may be possible to do this without using the dmz but I can't tell you
specifically what to change (it sounds like you have already done all the
right things).
| Quote: |
I have Googled and read several articles, they range from easy peasy
just open a few ports to it's impossible don't try.
|
I don't think it is impossible in the general sense but it usually more
trouble than it is worth ( your local firewall should protect you almost as
well as the NAT -- so going the dmz route is not in my opinion all that
much more dangerous).
| Quote: |
I have also asked Drayek (no response so far) why the router is sending
out an internal IP address, I don't know enough (anything) about NAT to
even know if this was a sensible question.
|
The leaking the private IP should not happen -- so I suspect that is a
router anomaly -- I don't think other routers have this leakage under this
situation (but I have always used the dmz route)
| Quote: |
Any suggestions or pointers to guides would be very much appreciated,
we use NM for support amongst a small group of us so getting it working
with calls in both directions would be really useful!
|
I would suggest that you use the dmz and configure the local firewall
appropriately. |
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Jeff Gaines
Guest
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| Posted:
Mon Aug 15, 2005 3:02 pm Post subject:
Re: NetMeeting Through a NAT Router? |
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On 11/08/2005 Brian Sullivan wrote:
| Quote: | I would suggest that you use the dmz and configure the local firewall
appropriately.
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Brian
A belated thank you, sorry I'm so late coming back:-(
It works fine in the DMZ. It also works when using a Linksys router.
There is some talk in the Draytek forums about the Vigor 2600 and NAT
which suggests it may be a router problem so I'll keep researching.
--
Jeff Gaines - Damerham Hampshire UK
Using XanaNews 1.17.5.9 |
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