Can connect with XP not with Vista

[carl]

Hello,

I have no ideas anymore...

I want to connect to setup a VPN from outside.

All the XP machines can connect without any issue. The Vista-machines
can't connect when they are behind a router. If they are connected
directly to a telephone line, or by cable, also the Vista machines can
connect to the VPN.

So I thought the router must stop some traffic. I already tried 4
different routers and brands. Everytime the XP's can connect
immediately, the Vista's not...

Somebody has an idea what is causing this?

Many, many thanks!
Carl

 

[Robert L [MVP - Networking]]

What's the error code?

Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on http://www.HowToNetworking.com
Hello,

I have no ideas anymore...

I want to connect to setup a VPN from outside.

All the XP machines can connect without any issue. The Vista-machines
can't connect when they are behind a router. If they are connected
directly to a telephone line, or by cable, also the Vista machines can
connect to the VPN.

So I thought the router must stop some traffic. I already tried 4
different routers and brands. Everytime the XP's can connect
immediately, the Vista's not...

Somebody has an idea what is causing this?

Many, many thanks!
Carl

 

[Carl Aalst]

None. Just a screen that says that the connection can't be made and 3
options (I'll translate cause my version is in Dutch):
1. Locate the problem: says that the router can't be pinged, which is
normal.
2. Again: same result
3. Try another connection

 

[Robert L [MVP - Networking]]

Do a simple test. Can you telnet port 1723?

Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on http://www.HowToNetworking.com
None. Just a screen that says that the connection can't be made and 3
options (I'll translate cause my version is in Dutch):
1. Locate the problem: says that the router can't be pinged, which is
normal.
2. Again: same result
3. Try another connection

 

[Carl Aalst]

Tried telnet: 0 ip-address 1723

Result: Trying to connect to ip-address... can not connect to host on
port 1723: connection failed

Hope this helps!

 

[Robert L [MVP - Networking]]

Assuming XP works but Vista, I would double check the Vista security settings. Or run clean boot with firewall disable. This how to may help,

Troubleshooting Vista with clean bootHow to run Windows OS with a clean ....How to run Windows OS with a clean boot ... when you cannot determine the cause of the issue, you may run Windows Safe ...
www.chicagotech.net/netforums/viewtopic.php?p=1243&sid=b8d6ed2a2c886cc03644340af5ff7132


Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on http://www.HowToNetworking.com
Tried telnet: 0 ip-address 1723

Result: Trying to connect to ip-address... can not connect to host on
port 1723: connection failed

Hope this helps!

 

[Carl Aalst]

Hello Robert,

Because it won't work with Vista in clean boot either, I tried the
telnet connection with one of the XP's that can connect without any
problem. The telnet connection fails with the same error as the Vista:
can not connect to host etc. Do you have any other ideas?

I want to thank you already for all your time spend on this issue!
Carl