I recently ran into a situation where a machine went into lockdown mode because of a lack of disk space. I wont tell you how we got into that situation, but it wasnt my fault :) What happens in lockdown mode? Check it out: The Firewall Packet Filter Engine (fweng) applies the firewall policy. Outgoing traffic from the Local Host network to all networks is allowed. If an outgoing connection is established, that connection can be used to respond to incoming traffic. more...   read more »