We often have these tidbits of information that we want to keep for reference because we need them once in a while. Here is a collection of such tidbits.

Private IP Space

• The following is a list of source addresses that should be filtered.
• 0.0.0.0/8 – Historical Broadcast
• 10.0.0.0/8 – RFC 1918 Private Network
• 127.0.0.0/8 – Loopback
• 169.254.0.0/16 – Link Local Networks
• 172.16.0.0/12 – RFC 1918 Private Network
• 192.0.2.0/24 – TEST-NET
• 192.168.0.0/16 – RFC 1918 Private Network
• 224.0.0.0/4 – Class D Multicast
• 240.0.0.0/5 – Class E Reserved
• 248.0.0.0/5 – Unallocated
• 255.255.255.255/32 – Broadcast