VPN DHCP problem

  • Thread starter Thread starter Guest
  • Start date Start date
G

Guest

Hi Guys,

I have a client who is useing the windows vpn client to connect to their
main office over a DSL connection. The client connects but is not assigned
an ip address, therefore it does not connect to the network.

I have created the same connection on my own XP laptop and it connects and
receives an ip address.

I have looked and can't find anything obvious. There does not appear to be
any difference in the connection.

Any ideas?

Thanks.
 
First make sure that their are enough address leases available for the VPN
connections. Then verify on that computer that it's VPN connectoid is
configured to obtain an IP address automatically and not to use a specific
IP address. It may also help to have the rras server issue IP addresses via
a static IP pool instead of using DHCP if the problem persists. You could
give it a range of addresses and then exempt those addresses in the DHCP
scope. For W2K computers if pptp is being used it also is best to configure
the VPN connectoid to use pptp under networking - type of VPN instead of
auto as W2K will always try l2tp first. -- Steve
'
 
Hi Steve,

Unfortunatley I do not have access to the server which is accepting the VPN
connections.

I have set the type of vpn connection to LLTP and auto, it does not appear
to matter. It still connects and says its authenticated but does not get
assigned an ip address.

I can connect to correctly and get assigned an IP address from 3 different
machines. 1 - XP laptop on same DSL connection as faulty PC, 2 - XP PC on
different network, 3 - WIN2000 SP4 PC on different network. When I plugged
in the faulty PC to my network, it recives a DHCP address from our server,
but not from the VPN connection. Strangely, when you check the status on the
connection icon, it says the client has the correct ip address, but ipconfig
does not. The connection also takes a long time (2-3 minutes) to connect,
where the other machines take about 30 seconds. The machine is a 2.6GHz
processor with 256Mb of RAM, so it is not a slow machine.

I have tried the following to solve the problem:

- Re-installed NIC drivers
- Installed different NIC
- Ran Spybot
- Uninstalled windows 2000 hotfix (sp5) Q818043 (which on the MS site said
it was an upgrade for VPN)
- Reapplied SP4
- Assigned static ip in vpn connection
- re-create VPN connection 3 times.

Do you have any more suggestions? My next step is a complete rebuild of the
PC.
 
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