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