RRAS VPN Server on Windows 2008 Behind NAT

Posted by Chris on Server Fault See other posts from Server Fault or by Chris
Published on 2009-11-21T00:54:18Z Indexed on 2010/05/03 8:08 UTC
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Ok, so I have kind of a funky setup, let me see if I can describe it.

I have a single VMware host with a public IP address 74.xx.xx.x Inside that host, I have 3 VM's

  1. Web Server - 1 NIC - 192.168.199.20
  2. SQL Server - 1 NIC - 192.168.199.30
  3. RRAS/VPN Server - 2 NICs 192.168.199.40 & 192.168.199.45

Due to Limitations of my ISP, all of the VM's are connected to the host VIA NAT. I have NAT setup for the webserver so all incoming requests on 74.xx.xx.x via port 80 route to 192.168.199.20. This works fine.

Now I want to set up a Windows 2008 VPN server inside this NAT network and forward the correct traffic to it. My questions are as follows?

  1. What are the TCP/UDP ports that i have to forward?
  2. What special configuration is needed on the server and clients since this is behind a NAT
  3. Any other advice would be wonderful.

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