Troubleshoot IPSec with these tips

Securing your organization's LAN and WAN traffic from prying eyes is an ongoing struggle. In the past, I've written about securing that traffic using IPSec policies. If you followed my recommendations, then good for you!But what if you've been experiencing problems with your IPSec implementation? We can usually trace most IPSec problems to difficulties during the Internet Key Exchange (IKE) phase of authentication.

Computers go through a process in which they authenticate each other's identity and form a security association. This identity authentication occurs via a preshared key, a digital certificate, or Kerberos (the default for Windows Server 2003).
However, before you begin troubleshooting the authentication process, let's start at the beginning. First, make sure IPSec is running.

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