RRAS: The number of ports available for use by this tunneling protocol should be greater than 0

Applies To: Windows Server 2008 R2, Windows Server 2012, Windows Storage Server 2012

This topic is intended to address a specific issue identified by a Best Practices Analyzer scan. You should apply the information in this topic only to computers that have had the Network Policy and Access Service (NPAS) Best Practices Analyzer run against them and are experiencing the issue addressed by this topic. For more information about best practices and scans, see Best Practices Analyzer.

Operating System

Windows Server 2012, Windows Server 2008 R2


Routing and Remote Access Service (RRAS)






The number of ports assigned to this tunneling protocol is zero.


If you do not assign any ports for use for tunneling with the specified protocol, then remote access clients cannot use that protocol to communicate with the RRAS server.

The number of ports determines the number of connections that your Routing and Remote Access VPN server can support. You can configure port numbers for SSTP, PPTP, L2TP, and IKEv2, You should assign a number that meets your operational requirements without overloading the network bandwidth or processing power of the server. If you set the number of ports for a tunneling protocol to 0, then the RRAS server cannot accept any VPN connections that use that protocol.


Use 'Routing and Remote Access' in Server Manager to increase the number of ports assigned to the tunneling protocol.

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

To configure the number of remote access ports for a tunneling protocol on the RRAS server

  1. Start Server Manager. Click Start, click Administrative Tools, and then click Server Manager.

  2. In the navigation tree, expand Roles, expand Network Policy and Access Services, and then expand Routing and Remote Access.

  3. Right-click Ports, and then click Properties

  4. Select the entry for the tunneling protocol, and then click Configure.

  5. In the Configure Device – WAN Miniport (tunnelingprotocol) dialog box, change the Maximum ports value to the number of connections that you want to support at one time. The default value is 128.

  6. Click OK twice to save your changes.

Additional references

For more information about configuring ports for remote access, see Configure Ports for Remote Access (http://go.microsoft.com/fwlink/?linkid=156072).

For more information about tunneling protocols, see VPN Tunneling Protocols (http://go.microsoft.com/fwlink/?linkid=156077).

For more about the Routing and Remote Access role service, see Routing and Remote Access (http://go.microsoft.com/fwlink/?linkid=153482) on TechNet, and Routing and Remote Access Service in the Windows Server Technical Library.