In the Forefront TMG Management console, in the tree, click the Monitoring node.

In the details pane, on the Sessions tab, verify whether your VPN session is listed. The site-to-site VPN session has the following properties:

• Session Type shows VPN Site-to-Site.
  
  
• Client Host Name shows the remote VPN server’s public IP address (if the session was initiated by the local VPN server, this field will be empty).
  
  
• Client IP shows the IP address assigned for the VPN session.
  
  
• Application Name shows that this is a VPN connection and displays the protocol used for the connection. Application Name is not displayed by default. To add it, right-click one of the column headings in the Sessions tab, and click Application Name.
  
  

To create a session filter that displays only site-to-site VPN sessions:

1. On the Tasks tab, click Edit Filter.
   
   
2. In the Edit Filter dialog box, in Filter by, select Session Type. In Condition, select Equals; and in Value, select VPN Remote Site.
   
   
3. Click Add To List, and then click Start Query. You must click Start Query to save the filter.