IP Packet Filtering
Block:
- Any packet coming into your network with a source address of your internal network
- Any packet coming into your network not with a destination address of your internal network
- Any packet leaving your network not with a source address of your internal network
- Any packet leaving your network with a destination address of your internal network.
- Any packet coming into your network or leaving your network with a private, loopback, or reserved source or destination address
- 10.x.x.x/8,
- 172.16.x.x/12
- 192.168.x.x/16
- 127.0.0.0/8.
- Source routed packets
- Packets with the IP options field set
- Reserved, DHCP auto-configuration and Multicast addresses
- 0.0.0.0/8
- 169.254.0.0/16
- 192.0.2.0/24
- 224.0.0.0/4
- 240.0.0.0/4