PPTP VPN problem

[somudrodev]

Hi, I am configuring a Cisco 3005 VPN concentrator for PPTP vpn for my users. The users are behind a Microsoft ISA 2000 firewall which is doing NAT overloading. The problem is only one user can connect the VPN box at a time. If the second user try to connect the concentrator generates a log like "access denied: connection already estabshiled with the remote peer (remote IP)".

Here is the network diagram

Users ----> ISA server (NAT overloading) ----> Concentrator.

All users are using Micosoft DUN for their PPTP connection.

How can I fix this problem????

~/Dev

[sachinraja]

Hi Dev,

are you getting any logs on the filterable log event of the vpn concentrator ?? this might be of help to us.. can u pls post the error u get on the concentrator ??

Raj

[somudrodev]

For PPTP it is only generating following log

"access denied: connection already estabshiled with the remote peer (remote IP)".

[kinfai.cheong]

Raj,

I am facing the same problem as Dev. my scenario is that i am using a broadband connection to connect to my office VPN. it works fine but when another user using the same broadband connection to connect to the office VPN, it get the Error 800.

When i check the log it show the same error message posted by Dev.

appreciate you help...thanks