The default behavior for VPN tunnel is to try indefinetly to reconnect and does not request credentials. Does anyone know how Juniper is preventing this connection from being hijacked? Obviously if you connect from a different network it request credentials. And, idle session timeout and using Host Checker leaves some protection. So far in my testing the Mac reruns hostchecker but the Windows client did not.
what are you concerned about being hijacked? how are you causing session interruption?