VPN Tunneling UP/Down

[mukhamad_juned]

Hello,

I get some problem for several days, the connection tunnel was up/down

then resolved after restart the fortinet.

can you help me to analyze this case ?

many thanks

[Toshi_Esumi]

Where did you see up/down? Do you have log around that time? What is the version of FortiOS? Any unusual spikes in CPU & memory usage at that time?

Depending on how frequent it happens, and how predictable it is, I would attempt capturing IKE app debug output WHEN it happens.