Solved

Can I restrict (windows 2003/8) PPTP VPN access based on computer name (and/or IP address)

Posted on 2011-02-14
5
1,352 Views
Last Modified: 2012-05-11
We are testing setting up a Windows 2008 box for incoming VPN connections.  I can make a successful connection from a remote machine and access network resources. I restrict by user and time of day.

Is it possible to restrict by computer name also, using PPTP?
How about the incoming client public IP address?

Our VPN server has a single NIC and running Network Policy Server (NPS) locally. Firewall is passing the tcp port.
Remote computers are mostly XP Pro.  Some Win7 may come in to play soon.

None of the remote machines are planned to be part of the domain. One of the two test machines is a domain workstation and the other is not.  Not sure if we plan to make them part of the domain or not as I have not been able to successfully execute log on scripts, which would be the major benefit for us.  (but that is another issue)

0
Comment
Question by:PlazaProp
  • 2
  • 2
5 Comments
 
LVL 69

Accepted Solution

by:
Qlemo earned 250 total points
ID: 34892673
To the best of my knowledge you cannot restrict PPTP connections by computer name.
You can put a firewall restriction on clients' public IPs before they reach the PPTP server, of course.
0
 
LVL 1

Author Comment

by:PlazaProp
ID: 34893316
Qlemo,  Are you suggesting that some setting be modified on the firewall on the edge of our network or the firewall on the windows server box?  I don't see anything in windows that will allow restriction by IP.  

I am not sure if I can restrict the port by IP address on our firewall but I am investigating.
0
 
LVL 38

Expert Comment

by:ChiefIT
ID: 34893757
TACACS and RADIUS servers can use Multiple means of authentication prior to getting an IP through the VPN. It' s probably your best bet. TACACS can use AD for authentication. So, you can split AAA on a TACACS server. However RADIUS servers hold Authentication, Authorization, and Access (AAA)  on the one server.

A second option is:
Also, MAC address filtering on the switches will prevent them from getting anywhere within the network, if the MAC address isn't enabled on the switches. But, that is VERY admin intensive unless you only have a few machines. So, on your router, a MAC address filter ACL through the VPN connection will limit only the machines with those MAC addresses through your VPN tunnel.
0
 
LVL 69

Expert Comment

by:Qlemo
ID: 34894731
MAC address filtering will not work, as VPN connections do not maintain the original MAC addresses. MAC addresses are a feature of local networks only.

IP filtering can be done on several levels. One is the IP Filter list in the NICs TCP/IP properties. But I guess it is much easier to filter on the edge device (which forwards the VPN traffic).
0
 
LVL 1

Author Comment

by:PlazaProp
ID: 34896895
MAC address filtering would be nice for road warriors that could have changing IP addresses.  For our initial roll out the clients all have static IP so filtering by IP would work.  I have verified that I can do this on our firewall.  Thanks for the tip.
0

Featured Post

Does Powershell have you tied up in knots?

Managing Active Directory does not always have to be complicated.  If you are spending more time trying instead of doing, then it's time to look at something else. For nearly 20 years, AD admins around the world have used one tool for day-to-day AD management: Hyena. Discover why

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

OpenVPN is a great open source VPN server that is capable of providing quick and easy VPN access to your network on the cheap.  By default the software is configured to allow open access to your network.  But what if you want to restrict users to on…
This article explains how to install and use the NTBackup utility that comes with Windows Server.
To efficiently enable the rotation of USB drives for backups, storage pools need to be created. This way no matter which USB drive is installed, the backups will successfully write without any administrative intervention. Multiple USB devices need t…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

776 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question