3Com 3C10402B, Administrator'S Manual

Page: 490 / 582

490 A
PPENDIX
D: C
ONNE
X
TIONS
H.323 G
ATEWAY
Note that it is possible for a NetMeeting connection to be unsuccessful
and still have a successful ConneXtions installation. This can occur
because ConneXtions restricts the range of TCP and UDP ports used but
NetMeeting allocates its ports from a wider pool. For more information,
see
“Firewall Security” on page 480 . If ConneXtions is installed with a
limited range of allowable ports, and the firewall is configured to pass
only those ports, it is possible that NetMeeting cannot pass a call through
the firewall while the more restricted ConneXtions calls can pass through.
The following procedure uses NetMeeting to test the connection
between the operating system that runs the NBX ConneXtions H.323
Gateway and a remote IP address. This end-to-end NetMeeting check can
help to recognize firewall problems without the complexity of the system
and ConneXtions H.323 server.
To make a NetMeeting check:
1 From the Start menu, select Settings , and then Control Panel .
2 Select Applications and then Services .
3 Select 3ComConnextions from the list, and click Stop.
4 Access
www.microsoft.com
using a web browser.
a Click Downloads in the navigation bar .
b In the Product Name field , select NetMeeting.
c In the Operating System field , select Windows 2000 .
d Click Find It! The latest versions of NetMeeting are displayed. Click the
version you require.
5 Download NetMeeting files and respond to the prompts.
a Click the program name (
NM30.exe
) next to Download Now.
b Click OK .
c In the Save As dialog box, select a folder for the downloaded files.
d Click Save.
6 Install the NetMeeting files and respond to the prompts:
a Select Open when the download is complete.
b Click Yes to confirm installation.
c Click Yes to acknowledge the legal agreement.
d Click OK to accept the default installation directory.