I have on 2 locations with a UTM9 (running version 9.111-7, even the same issue with the previous version). Between the 2 location i have a IPSEC site 2 site connection and the issue is that the connection going down.
It is a setup where the 'remote site' initiates the ip-sec tunnel.
When i reboot the UTM on the remote-site the vpn tunnel is restored, but after some time it drops again.
I need some help / hints where to look for the reason that the tunnel droppes.
It looks like when VNC / SSH connection is active to a linux server, the ip-sec tunnel has stability issues.
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