The sys admin’s daily grind: Netstat-nat
NAT MATTERS
Without Network Address Translation (NAT) on many LANs, the IPv4 Internet address space would have been exhausted years ago. Still, it’s probably a good idea to check what comes through your NAT connections.
From a topology point of view, LANs are the Internet’s hidden flaw. Many public hosts are actually gateways behind which any number of computers with private IPs might reside.
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