In this lab, you will configure PPTP packet filters for tunneling.
- In the RRAS window, expand the server and IP Routing nodes to expose the General node of the server you’re working on. Select the General node.
- Right-click the interface that you used in the previous lab and choose Properties.
- In the General tab of the interface Properties dialog box, click the Inbound Filters button. The Inbound Filters dialog box appears.
- Click the New button and the Add IP Filter dialog box appears.
- Fill out the Add IP Filter dialog box as follows:
- Check the Destination Network checkbox.
- Fill in the destination IP address field with the IP address of the remote VPN interface. For this lab, you can use any IP address.
- Supply a destination subnet mask of 255.255.255.255.
- Select a protocol type of TCP and then specify a source port of 0 and a destination port of 1723.
- Click the OK button.
- The Inbound Filters dialog box reappears, listing the new filter you created in step 5. Repeat step 5, but this time specify Other in the Protocol field and fill in a protocol ID of 47. When you’re done, click the OK button and you’ll go back to the Inbound Filters dialog box.
- In the Inbound Filters dialog box, click the Drop All Packets Except Those That Meet The Criteria Below radio button and click the OK button.
- Repeat steps 3–7, but this time create output filters. Make sure to specify the IP address of the VPN adapter as the source, not the destination!
- Close the interface Properties dialog box.
