Hello to eneryone, I have managed to establish a vpn tunnel between 2 RVS4000. Both sides are behind dynamic ip and ADSL lines (24Mbps/1Mbps) and I 'm using dyndns.org. The problem is that almost once a day the tunnel does down and it doesn't come back up automaticly. However, if I log into either the router and simply click on the Save settings button of the IPSec VPN tab, the tunnel comes back in 5 seconds. Both sides have exactly the same settings, with Block WAN requests disabled, MTU 1492 and not aggressive mode. (I can't enable aggressive mode because as soon as I click on it and save settings, it is appeared again to be disabled) Do you have any suggestions?