IP Masquerade

[tobin park]

Hello,
I want to insert the masquerade source in ip modules for studying network.
Let me know the simplest procedure(having no user interface)for masquerading 
the ip address into the outer interface(nic). (192.168.1.0/24 
->211.210.66.15/32)

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My procedure is
1. Hooked the ip_out procedure inserted my #ifdef sentence.
2. changed the socket buffer source address into the routing table source 
address.
3. updated the ip header checksum
4.. echo "1">/proc/sys/net/ipv4/ip_forward
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Let me know the correct procedure for masquerading.(Not depends on the 
existed mas
querading source)

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