Hey! We've a problem.. Every next day, the router used to say there is a connection with the remote gateway, but a ping to the remote network doesn't work. My Configuration is a static IP to static IP connection.. with a subnet at each gateway. A ping works again after reconnecting the tunnel. Following red marked options are checked in advanced menu: Aggressive Mode Compress (Support IP Payload Compression Protocol(IPComp)) Keep-Alive AH Hash Algorithm MD5 SHA1 NetBIOS broadcast NAT Traversal Dead Peer Detection (DPD) Interval  seconds Thank u all for any help!!!