The IPsec tunnel on the Fortigate box is not working properly. It was working before and nothing has changed on the network. I have checked the logs on the dial up client (Fortigate box), I get the following message:
Initiator: parsed aggressive mode message # 1 (error)
Negotiate SA Error: probable pre-shared secret mismatch
On the Server (Fortigate box) the log is giving me this message:
Responder: parsed main mode message # 3 (error)
How can I make the tunnel go up again?
On the Server