Remote Desktop Problems via Ipsec VPN to terminal server
Posted on 2007-04-01
To whom it may concern,
We are experiencing problems with one of our clients networks. We have three Netcomm NB5580 setup at three different sites. Site B & C are connected via IPSEC VPN to Site A. Site A has a Win2k terminal server installed on the local netowrk. User's at Site B & C use RDP to connect via the VPN to the Terminal Server. This has been working with out problems for over a year.
Last week, user's starting complaining that they could no longer connect to the terminal server. First of all I checked the VPN status in the Site A router. Both VPN connections seemed connected. I then tried restarting all routers and re-establishing the VPN's. This had no effect. The strange thing is that all ping tests work from each site vice versa. The only thing that doesn't work is RDP.
I then tested the RDP in the local network at Site A. RDP from a workstation to the Terminal server worked fine.
I then tried forward port 3398 to the terminal server and making Site B & C connect to the public IP address. Bypassing the VPN. That worked fine.
It's only when the RDP has to connect via the Hardware VPN does it fail to work.
At the moment I have Site B & C connecting dial-up PPTP VPN's to the Windows Server and then connecting RDP.
Are there any known problems with RDP over IPSEC VPN?