Dial-Up kills WAN connections

[BShupe]

When someone makes a dial-up connection to our ISP on a
PC at one of our remote sites, they lose their
connectivity through the WAN but keep their in-the-
building LAN connections.

The PCs setup is:
One 56K modem.
One network adapter.
In-the-building Computers: 10.2.220.xxx
In-the-building Gateway: 10.2.220.1
WAN Gateway: 10.1.220.1
WAN Computers: 10.1.220.xxx

Is there a way to configure their Windows XP Pro system
to be able to dial-up the ISP and still access not only
their in-the-building network but across the WAN to
10.1.220.xxx as well?

 

[Kent W. England [MVP]]

When someone makes a dial-up connection to our ISP on a
PC at one of our remote sites, they lose their
connectivity through the WAN but keep their in-the-
building LAN connections.

The PCs setup is:
One 56K modem.
One network adapter.
In-the-building Computers: 10.2.220.xxx
In-the-building Gateway: 10.2.220.1
WAN Gateway: 10.1.220.1
WAN Computers: 10.1.220.xxx

Is there a way to configure their Windows XP Pro system
to be able to dial-up the ISP and still access not only
their in-the-building network but across the WAN to
10.1.220.xxx as well?

Normally, the dial-up connectoids have "use default gateway on remote
network" enabled on the Advanced TCP/IP properties tab of the Networking
properties tab. This disables your WAN.

It is likely that if you uncheck this box, the WAN connection will
return, but whatever the user is accessing via dial-up will not be
accessible. You'll have to try it and see. You may be able to add routes
to the WAN interface to re-enable access to whatever you need to access
while the dial-up is active.

 

[Steve Winograd [MVP]]

When someone makes a dial-up connection to our ISP on a
PC at one of our remote sites, they lose their
connectivity through the WAN but keep their in-the-
building LAN connections.

The PCs setup is:
One 56K modem.
One network adapter.
In-the-building Computers: 10.2.220.xxx
In-the-building Gateway: 10.2.220.1
WAN Gateway: 10.1.220.1
WAN Computers: 10.1.220.xxx

Is there a way to configure their Windows XP Pro system
to be able to dial-up the ISP and still access not only
their in-the-building network but across the WAN to
10.1.220.xxx as well?

Define a persistent static route to the 10.1.220.x subnet using the
In-the-building Gateway:

route -p add 10.1.220.0 mask 255.255.255.0 10.2.220.1
--
Best Wishes,
Steve Winograd, MS-MVP (Windows Networking)

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