I'm new to netfilter. I've been going through the HOW-TO's on NAT, and I want to change the destination on packets based on it's destination. I set up a test, the idea being, I want to change the destination of a packet from 192.168.100.99 to 127.0.0.5. The packet will be generated locally. The first thing I did, is I set up my route tables so that 192.168.100.99 127.0.0.5 255.255.255.255 UGH 0 0 0 lo 10.254.223.0 * 255.255.255.0 U 0 0 0 eth0 127.0.0.0 * 255.0.0.0 U 0 0 0 lo default whatever 0.0.0.0 UG 0 0 0 eth0 So I have 192.168.100.99 routed to my local interface, "lo". Here's my NAT listing: # iptables -t nat -L Chain PREROUTING (policy ACCEPT) target prot opt source destination DNAT all -- anywhere 192.168.100.99 to:127.0.0.5 Chain POSTROUTING (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination To test it, I telnet to the SSH port with telnet 127.0.0.5 22 which gets me a connection, but telnet 192.168.100.99 22 just shows a SYN_SENT when I check with netstat. So, is what I'm doing doable? If so, how do I do it? === Al
