Private ip address

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Private internet addresses are often used on the LAN.

The allowed private IPv4 addresses are specified in rfc1918:

  • - (10/8 prefix)
  • - (172.16/12 prefix)
  • - (192.168/16 prefix)

Note: Private ip addresses must be (source) translated (NATted, tcp, udp: PAT) to a public (=non-private) ip address (tcp: socket) before its payload can be send into the (public) internet.

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