Background:
I have a Windows Server 2003 machine in a workgroup (non-domain), and want
to have both Windows XP and Windows Vista clients connect to it, receive an
IP address, and route traffic through it to other machines in the remote
network.

Three part question:
1) What ports do I need open on my firewall (in front of the server) to pass
traffic to it?
2) Will it work properly for clients that connect from behind a home
firewall (NAT, then cross the internets, then NAT to the Windows server)?
3) What do I need to do to configure the Windows Server 2003 to accept
connections and issue internal (LAN) IP addresses to the clients?

Show quote Hide quote    1. The ports you need to open depend on what sort of VPN you use. PPTP
uses tcp port 1723. It also requires GRE which is IP protocol 47 (not port
47).

  2.  VPN should work from clients behind NAT.

  3. The IP address pool for the remote clients is configured in the VPN
server. If this pool is in the same IP subnet as the LAN, the remotes will
get an IP address in the same subnet as the LAN. The VPN server acts as a
proxy for the remote clients.

   Note that VPN only gives you an IP connection. It does not automatically
give you name resolution like a LAN connection.

Hello,

Thank you for posting here. Also thanks for the input from Bill.

According to your description, I understand that:

You want to know how to deploy a Windows Server 2003 VPN server in the
workgroup mode.

If I have misunderstood the problem, please don't hesitate to let me know.

1. The ports that you need to forward on the firewall depends on the
tunneling protocol you will use on the VPN server. Beside the PPTP, if you
want to deploy a L2TP tunneling protocol VPN server, you will need to open:
"    UDP port 500.
This filter allows Internet Key Exchange (IKE) traffic to the VPN server.
"    UDP port 1701.
This filter allows L2TP traffic from the VPN client to the VPN server.
"    UDP port 4500.
This filter allows IPSec network address translator traversal (NAT-T)
traffic.

For more detailed information, you may refer to:

VPN servers and firewall configuration
http://technet.microsoft.com/en-us/library/cc737500(WS.10).aspx

2. Typically, outbound VPN traffic is allowed by the NAT router (firewall)
by default.

3. You need to open enough PPTP/L2TP ports on the VPN server to make it
accept the incoming VPN connections.

Configure Ports for Remote Access
http://technet.microsoft.com/en-us/library/dd458965(WS.10).aspx

To issue internal IP address to VPN clients, you may simply configure RRAS
to use addresses from a DHCP server. You can also create a address pool to
achieve the goal, too.

Configure the Way RRAS Assigns IP Addresses to VPN Clients
http://technet.microsoft.com/en-us/library/dd469667(WS.10).aspx

If you have any questions or concerns, please do not hesitate to let me
know.





Best regards,

Miles Li
Microsoft Online Newsgroup Support

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David <DMG@newsgroup.nospam> wrote:
Show quoteHide quoteTake my advice - don't do this. Let your firewall appliance handle VPN
connections. If you don't have one that can do it, look into an inexpensive
SSL VPN appliance - Netgear makes some.

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