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How to fix ‘-9999:-9999’ error while changing the IPsec VPN tunnel configuration

By: Author Alex Lim

Posted on

Categories Troubleshooting

This article describes how to resolve error ‘-9999.9999’ in an IPsec tunnel.

Scope

All FortiGate Firmware.

Solution

The error:

How to fix '-9999:-9999' error while changing the IPsec VPN tunnel configuration

It is not possible to change the ‘tunnel type’ configuration once it is configured. The following error appears in configuration:

It is not possible to change the 'tunnel type' configuration once it is configured. The following error appears in configuration.

The only solution for this issue is to recreate the tunnel.