jengelh at linux01.gwdg.de
Thu Jul 21 13:54:03 CEST 2005
>> Suppose I masquerade ppp0 using
>> iptables -t nat -A POSTROUTING -o ppp0 -j MASQUERADE
>> And now all packets will have a src ip addr as 192.168.0.2 will be
>> changed to that of ppp0 , for example say 10.10.10.1
No, it does not say "changed to that of ppp0" but:
_change_all_packets_that_go_out_of_ppp0_ (...to the address belonging to ppp0)
>> Now my question is, when the reply comes, their destination addr will be
>> that of ppp0 i.e 10.10.10.1
>> Who will reverse translate this 10.10.10.1 destination addr to actual
>> 192.168.0.2 ?
>This is the job of connection tracking, basically ipt_conntrack.
ipt_conntrack is the module for the -m conntrack match used by iptables.
More information about the netfilter