IPSec is used to implement secure communications within a networking environment. If there are no other components within PKI that you wish to use, you should at least implement IPSec. It’s easy, there’s almost no overhead, and the benefits (although, hopefully unseen) can be huge. You can implement IPSec using the steps outlined below:

1. Begin by accessing Administrative Tools from the Start Menu. Select either Local Security Policy (for the standalone server or XP system) or Domain Policy (for the domain controller).

2. Select IP Security Policies.
3. Notice that on the right, there are three options.
4. Double-click on the Secure Server option.
5. Click on the Add button, and Click Next twice.
6. Select Remote Access, and click on the Next button.
7. Select the All IP Traffic radio button, and click on the Next button
8. Click on the Require Security radio button and click on the Next button.
9. Click on the Next button again, and select Finish.
10. Double-click on the Secure Server option again.
11. One by one, delete all rules except for the one you just created.