| This is an experimental demonstration target which inverts the source | |
| and destination fields in the IP header and retransmits the packet. | |
| It is only valid in the | |
| .BR INPUT , | |
| .B FORWARD | |
| and | |
| .B PREROUTING | |
| chains, and user-defined chains which are only called from those | |
| chains. Note that the outgoing packets are | |
| .B NOT | |
| seen by any packet filtering chains, connection tracking or NAT, to | |
| avoid loops and other problems. |