3.3.3 mangle
The mangle table is used to alter packets in certain ways. It cannot be used to filter or perform NAT. It has the following
chains:
- PREROUTING: applies to incoming packets/fragments before routing.
- OUTPUT: applies to packets/fragment originating from the local host.
- INPUT: applies to incoming packets/fragments for the local host.
- FORWARD: applies to packets that are just passing through the local host.
- POSTROUTING: applies to outgoing packets/fragments after routing.
The use of this table should be discussed in another module.