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Why do we need private addresses such as RFC1918? Well, say for instance you configure your local network with your router interface You configure your clients with DHCP of range Everything will work fine, your clients in your local network will be able to contact each other. You can even S-NAT these addresses to your WAN-...


RFC 1918 provides address ranges that you can safely use within a private network without any danger that these same addresses might be used on the public Internet. Any node within your network needs to be able to address any destination it requires. If your local network uses the same address range (subnet) that some public servers do (e.g, ...


The security options from RFC 791 are long defunct. I don't think they were ever used outside of DoD (if at all).

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