Hello all.
I have Vigor 3220 connected to UPS. Wan1 and Wan2 are used. For remote office access, a number of VPN connections are configured for users. Sometimes, for no apparent reason, the router reboots. About once every 1-2 days. Sys ver dbg does not contain any entries.

There is a suspicion that this happens when one of the users is connected via VPN, but I cannot catch it in the log files. Did anyone have a similar problem?

Firmware Version 3.9.4