In this video, you will learn how to troubleshoot a site-to-site IPsec VPN that provides transparent communication between a Headquarters FortiGate and Branch office FortiGate. This video will show you how to diagnose common problems when your tunnel connection fails, and how to adjust your settings when the tunnel drops on and off. This video includes common Preshared Secret Key issues, Security Association or “SA” proposal errors, quick mode selector issues, and more. By the end of this tutorial you should have a better understanding of how to use these debug commands for basic troubleshooting.This video is recorded on FortiOS 5.2.6, and although the GUI options may vary, the troubleshooting tips and CLI commands are relevant for most recent builds.
The recipe for this video is available here.
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