I'm using Microsoft's PPTP VPN to connect my network (which includes a Dlink DI-604 router) with remote computers.
All use Windows XP SP2.
Now - There are no problems when the remote computer establish a vpn connection to my network... (after enabling VPN Pass Through for PPTP and opening port 1723).
But when a second remote computer tries to establish a VPN connection with the same host - I get an error - saying that a VPN connection has already been established and that a second one can't be established...
OK, so I thought that I could open a second VPN server on the other computer on my network - but now - I have to open port 1723 for incoming connection (for the 2nd computer on my network) ... so I
have set additional port forwarding on my Virtual Server list on my router - and set it to :
Private port : 1723
Public port: 1800.
But when I try to connect with the VPN client to that computer in the following format for host name: "Hostname:1800" - I get an error# 800.
No other firewalls are present.
So I can't connect the 2nd remote computer to my VPN server.
Is there a way to by pass the problem ?
I have also noticed internet inactivity and dramatic reduction in internet speed on the client side of the VPN connection - is this normal ? and is there a way to solve the problem by e.g reducing the MTU or using a different protocol (like IPSec).
I would also like to know whether other VPN's such as:
Symantec Enterprise VPN
- do a better job than Microsoft's built-in VPN...