| Author |
Message |
Darren
Guest
|
 Posted:
Sat Feb 28, 2004 3:07 am Post subject:
Netmeeting works but nothing else does |
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Hi, I have an AdHoc wi-fi network setup between my laptop (XP Prof) and
desktop (XP Home). When I call my desktop (192.168.0.1) from the laptop
(192.168.0.244) it works. The otherway get no response. It's only calls
that work, Remote Desktop Sharing doesn't work either way.
I can call external ip addresses from the desktop (which has the ADSL
modem), but no response from external ip addresses when calling from the
laptop (which shares the desktops internet connection without problems for
web browsing and email.
The laptop is a works machine that connects to a proper network. When I
look at the Computer Name by right clicking MyComputer etc there is a domain
id listed. Is this causing the problems?
Even "pinging" my desktop (192.168.0.1) from the laptop fails, but simple
netmeeting calls one way work.
Any ideas?
Cheers Darren. |
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Brian Sullivan MVP
Guest
|
| Posted:
Sat Feb 28, 2004 3:23 am Post subject:
Re: Netmeeting works but nothing else does |
|
|
Darren wrote:
| Quote: | Hi, I have an AdHoc wi-fi network setup between my laptop (XP Prof)
and desktop (XP Home). When I call my desktop (192.168.0.1) from the
laptop (192.168.0.244) it works. The otherway get no response. It's
only calls that work, Remote Desktop Sharing doesn't work either way.
|
Do you have the XP or other firewall enabled on the laptop?
What about the desktop.
| Quote: |
I can call external ip addresses from the desktop (which has the ADSL
modem), but no response from external ip addresses when calling from
the laptop (which shares the desktops internet connection without
problems for web browsing and email.
|
So the desktop is running ICS I presume?
| Quote: |
The laptop is a works machine that connects to a proper network.
When I look at the Computer Name by right clicking MyComputer etc
there is a domain id listed. Is this causing the problems?
|
Perhaps -- but physically you are in the same ethernet subgroup so I don't
think that should be an issue.
I can't think of a set of configuration issues that would cause those
specific sympotms.
--
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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Darren
Guest
|
| Posted:
Sat Feb 28, 2004 4:48 am Post subject:
Re: Netmeeting works but nothing else does |
|
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| Quote: | Do you have the XP or other firewall enabled on the laptop?
|
looking at the wi-fi network connection settings, Net Firewall Service is
ticked and I can't untick it as I don't have admin rights (work laptop)
| Quote: | What about the desktop.
|
yes. turned it off and the laptop can ping the desktop now. NPF must have
stealthed the desktop. The desktop still can't ping the laptop but that's
probably the Net Firewall Service stealthing the laptop.
Do you agree?
| Quote: | So the desktop is running ICS I presume?
|
Yes, on the ADSL network connection. Unticked on the wi-fi connection.
In NPF, I have added a trusted zone of the range 192.168.0.2 to
192.168.0.255 as I believe these can ONLY be machines that have attached to
my wi-fi AdHoc network (which has encryption turned on).
Am I right, is this safe?
File sharing and printer sharing and mapped network drives now work with NPF
switched on.
Many thanks Brian. Much appreciated.
Darren |
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Brian Sullivan MVP
Guest
|
| Posted:
Sat Feb 28, 2004 6:06 am Post subject:
Re: Netmeeting works but nothing else does |
|
|
Darren wrote:
| Quote: | Do you have the XP or other firewall enabled on the laptop?
looking at the wi-fi network connection settings, Net Firewall
Service is ticked and I can't untick it as I don't have admin rights
(work laptop)
|
Can you configure it? Allowing tcp 1503 and tcp 1720 should allow you to
have incoming NetMeeting calls.
| Quote: |
What about the desktop.
yes. turned it off and the laptop can ping the desktop now. NPF
must have stealthed the desktop. The desktop still can't ping the
laptop but that's probably the Net Firewall Service stealthing the
laptop.
Do you agree?
|
Yes.
| Quote: |
So the desktop is running ICS I presume?
Yes, on the ADSL network connection. Unticked on the wi-fi
connection.
Brian Sullivan
In NPF, I have added a trusted zone of the range 192.168.0.2 to
192.168.0.255 as I believe these can ONLY be machines that have
attached to my wi-fi AdHoc network (which has encryption turned on).
Am I right, is this safe?
|
It depends on how tied down your network is - but it should be fairly safe.
( I have my wi-fi set to only allow a small set of known MAC addresses
access, and run at the highest encryption available, and regularly change
encyrption keys but even then there is some risk).
| Quote: |
File sharing and printer sharing and mapped network drives now work
with NPF switched on.
|
--
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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|
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Darren
Guest
|
| Posted:
Sat Feb 28, 2004 3:02 pm Post subject:
Re: Netmeeting works but nothing else does |
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Apologies in advance for "latching" on to you on this.
| Quote: | looking at the wi-fi network connection settings, Net Firewall
Service is ticked and I can't untick it as I don't have admin rights
(work laptop)
Can you configure it? Allowing tcp 1503 and tcp 1720 should allow you to
have incoming NetMeeting calls.
|
Can't change properties. Last time I unofficially logged on as the admin I
managed to delete my profile (XP network wizards, don't ask) so I'm not
going to do that again.
Is 1503 only used to establish, or is it needed during the call. If during
then the Firewall can't be blocking 1503 as calls from the laptop work.
Searched on google and found Microsoft Knowledge Base Article - 158623 which
says
'In addition, some firewalls are capable of passing through TCP connections
on specific ports and secondary UDP connections on dynamically assigned
ports, but are not capable of virtualizing an arbitrary number of internal
IP addresses, or are not capable of doing so dynamically. With these
firewalls, you are able to establish NetMeeting connections from computers
inside the firewall to computers outside the firewall and you are able to
use the audio features of NetMeeting, but you are unable to establish
connections from computers outside the firewall to computers inside the
firewall.'
which is my problem so that might be it, but you'd think the XP wi-fi Net
Firewall Service would be able to do anything.
| Quote: | ( I have my wi-fi set to only allow a small set of known MAC addresses
access, and run at the highest encryption available, and regularly change
encyrption keys but even then there is some risk).
|
I couldn't find anywhere to restrict MAC addresses, someone mentioned these
are not supported in AdHoc mode. Is this the case?
Thanks again. Darren |
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Brian Sullivan MVP
Guest
|
| Posted:
Sat Feb 28, 2004 6:46 pm Post subject:
Re: Netmeeting works but nothing else does |
|
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Darren wrote:
| Quote: | Apologies in advance for "latching" on to you on this.
looking at the wi-fi network connection settings, Net Firewall
Service is ticked and I can't untick it as I don't have admin rights
(work laptop)
Can you configure it? Allowing tcp 1503 and tcp 1720 should allow
you to have incoming NetMeeting calls.
Can't change properties. Last time I unofficially logged on as the
admin I managed to delete my profile (XP network wizards, don't ask)
so I'm not going to do that again.
Is 1503 only used to establish, or is it needed during the call.
|
"Full" NetMeeting calls are really two calls in parallel - and H.323
audio/video call and a T.120 data call. TCP 1503 is used for the T.120 part
the call ( everything .. call establishment and data transfer). TCP 1720 is
used for call establishment/control for the audio/video call. During call
establishment a series of other ports are negotiated to do audio/video data
transfer
| Quote: | during then the Firewall can't be blocking 1503 as calls from the
laptop work.
|
Because it can accept the incoming call you mean -- yes I would guess that
too.
| Quote: | Searched on google and found Microsoft Knowledge Base
Article - 158623 which says
'In addition, some firewalls are capable of passing through TCP
connections on specific ports and secondary UDP connections on
dynamically assigned ports, but are not capable of virtualizing an
arbitrary number of internal IP addresses, or are not capable of
doing so dynamically. With these firewalls, you are able to establish
NetMeeting connections from computers inside the firewall to
computers outside the firewall and you are able to use the audio
features of NetMeeting, but you are unable to establish connections
from computers outside the firewall to computers inside the firewall.'
which is my problem so that might be it, but you'd think the XP wi-fi
Net Firewall Service would be able to do anything.
|
I am not sure what you are saying here -- what is the "Net Firewall Service"
in this context -- are you referring to XP's built in firewall or something
else?
| Quote: |
( I have my wi-fi set to only allow a small set of known MAC
addresses access, and run at the highest encryption available, and
regularly change encyrption keys but even then there is some risk).
I couldn't find anywhere to restrict MAC addresses, someone mentioned
these are not supported in AdHoc mode. Is this the case?
|
Yes possibly -- I had forgetton that you were using that strategy-- I don't
have much experience using ad hoc mode so am not totally sure about issues
there.
--
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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|
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Darren
Guest
|
| Posted:
Fri Mar 05, 2004 2:01 am Post subject:
Re: Netmeeting works but nothing else does |
|
|
| Quote: | which is my problem so that might be it, but you'd think the XP wi-fi
Net Firewall Service would be able to do anything.
I am not sure what you are saying here -- what is the "Net Firewall
Service"
in this context -- are you referring to XP's built in firewall or
something
else?
|
When I look at 'Properties' of 'Wireless Network Connection' there is a box
titled 'This connection uses the following'. In the list are the usual
Internet protocol (TCP/IP) etc. but also something called Net Firewall
Service. I don't think it's XP's standard firewall as the 'Advanced' tab at
the top is missing on my laptop and that's where the option to turn XP
firewall on is on my desktop, so I guess systems at work have removed XP
firewall from our laptop build. As I said, I don't have admin rights so I
can't change any settings.
Anyway,
In Norton Personal Firwall on my desktop I've added a trusted zone of
192.168.0.2 to 255, set Permit All for Netmeeting and Netmeeting Remote
Desktop Sharing and I'm still having problems with Netmeeting Remote Desktop
Sharing.
On the desktop I've set a password for the XP Admin user, activated
Netmeeting Remote Desktop Sharing on Netmeeting exit but when I try calling
(with security) I get "The person you called is not able to accept
NetMeeting calls". If I run NetMeeting on the desktop and call it from the
laptop for a standard meeting it's fine and I can Allow control etc.
It worked once, the first time (maybe, or was that a dream, no), but now it
won't.
I give up. Being able to control the desktop from the laptop without having
to set it up each time from the desktop keyboard just wasn't meant to be, I
guess.
Darren. |
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|
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Brian Sullivan MVP
Guest
|
| Posted:
Fri Mar 05, 2004 2:25 am Post subject:
Re: Netmeeting works but nothing else does |
|
|
Darren wrote:
| Quote: | which is my problem so that might be it, but you'd think the XP
wi-fi Net Firewall Service would be able to do anything.
I am not sure what you are saying here -- what is the "Net Firewall
Service" in this context -- are you referring to XP's built in
firewall or something else?
When I look at 'Properties' of 'Wireless Network Connection' there is
a box titled 'This connection uses the following'. In the list are
the usual Internet protocol (TCP/IP) etc. but also something called
Net Firewall Service. I don't think it's XP's standard firewall as
the 'Advanced' tab at the top is missing on my laptop and that's
where the option to turn XP firewall on is on my desktop, so I guess
systems at work have removed XP firewall from our laptop build. As I
said, I don't have admin rights so I can't change any settings.
|
I don't know what that is then -- it must be something configured for your
at work connection.
It may be the cause of your problems.
| Quote: |
Anyway,
In Norton Personal Firwall on my desktop I've added a trusted zone of
192.168.0.2 to 255, set Permit All for Netmeeting and Netmeeting
Remote Desktop Sharing and I'm still having problems with Netmeeting
Remote Desktop Sharing.
On the desktop I've set a password for the XP Admin user, activated
Netmeeting Remote Desktop Sharing on Netmeeting exit but when I try
calling (with security) I get "The person you called is not able to
accept NetMeeting calls". If I run NetMeeting on the desktop and
call it from the laptop for a standard meeting it's fine and I can
Allow control etc.
It worked once, the first time (maybe, or was that a dream, no), but
now it won't.
I give up. Being able to control the desktop from the laptop without
having to set it up each time from the desktop keyboard just wasn't
meant to be, I guess.
|
Perhaps -- not from this laptop anyway.
--
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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