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No they fucking don't, that's not what routers do. You don't know what you're talking about.
And don't fucking tell me NAT is for security, either.
That literally is though? NAT stands for Network Address Translation. It'll take you public IP and translate those packets to use your internal one.
If your computer has an address that starts with
169
,168
, or10
there is a NAT somewhere in your network.And it's a "security thing" in the same way that asking someone's name over the phone prevents impersonation haha
Have you ever chained three Cisco 2600 routers together and then successfully ping'd clients on each end? Do you know what BGP is? OSPF? Do you know the difference between routing and routed protocols?
I know you don't, because people who do don't make the claims you're making.
Not really.
And even as a network amateur I know that its
10.0.0.0/8
172.16.0.0/12
192.168.0.0/16
and 169.254.0.0/16 is not even routable so no dice with NAT.
So someone can connect to you just with with a public IPv4 starting with 192.x.x.x