SBS VPN clients not getting IPs

Problem:

VPN is configured through SBS Console. Client stops getting IPs from DHCP. I was in a situation where I couldn’t reboot the server.

Solution:

I followed the following post: http://alanhardisty.wordpress.com/2011/11/14/how-to-assign-a-static-ip-address-to-a-vpn-client-in-sbs-2008-and-sbs-2011/

See below for more info.

This post helped up to a certain point. I suspect that there was an errant group policy that prevented the changes from taking effect.

The following is what fixed it for me: http://technet.microsoft.com/en-us/library/dd469667.aspx. What I did was, I created a static IP address pool.

Configure the Way RRAS Assigns IP Addresses to VPN Clients

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Applies To: Windows Server 2008 R2

You can use a DHCP server to assign IP addresses to VPN clients or you can configure an RRAS server to use a static pool of IP addresses for allocation to TCP/IP-based remote access and demand-dial connections. For more information, see RRAS and DHCP (http://go.microsoft.com/fwlink/?linkid=140605).

Membership in the local Administrators group, or equivalent, is the minimum required to complete this procedure.

To create a static IP address pool

  1. Open the RRAS MMC Snap-in.
  2. Right-click the RRAS server name, and then click Properties. If you are using Server Manager, right-click Routing and Remote Access, and then click Properties.
  3. On the Properties page, click the IPv4 tab.
  4. Under IPv4 address assignment, click Static address pool.
  5. Click Add.
  6. In Start IP address, type a starting IP address.
  7. Type either an ending IP address for the range in End IP address, or type the number of IP addresses in the range in Number of addresses, and then click OK.
  8. Click OK, and then repeat steps 5 through 7 for as many ranges as you need to add.

To configure RRAS to use addresses from a DHCP server

  1. Open the RRAS MMC Snap-in.
  2. Right-click the server name for which you want to create a static IP address pool, and then click Properties. If you are using Server Manager, right-click Routing and Remote Access, and then click Properties.
  3. On the Properties page, click the IPv4 tab.
  4. Under IPv4 address assignment, click Dynamic Host Configuration Protocol (DHCP).
  5. Click OK to save your changes.