R0n1n, I suppose it depends on the router you are using and the manufacturer's interpretation of NAT. If your router has a built in firewall, then some protection will be afforded, however, NAT by itself will not drop any traffic to the public IP. It simply changes the source or destination address accordingly and passes the traffic to the internal/external network. If the router is doing PAT/address overload (or "hide NAT" as Checkpoint calls it) then, yes only packets responding to traffic generated from inside the router will be permitted back into the internal network. Once again, this is not NAT but PAT. As I mentioned before, I am speculating that extremez' ISP is using a NAT pool (possibly with overload enabled in the event that all the IPs in the pool are used up, as extremez had previously mentioned), otherwise he would not be experiencing the issue in question.

_TOMDAQ