Private Address Space

• Three blocks

  • 10.0.0.0/8
  • 172.16.0.0/12
  • 192.168.0.0/16

• Easy to filter as contiguous blocks

  • deny 10.0.0.0 0.255.255.255
  • deny 172.16.0.0 0.15.255.255
  • deny 192.168.0.0 0.0.255.255

• Can be translated if necessary

  • Network address translation needs to be understood

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