*** Sorry for mistake I have configured static route on ADSL modem "10.123.0.0/16 via > 10.123.10.1" which ensures traffic comming from internet will ge to > my router 10.123.10.1 is address of eth0 on my router. On Sun, Jan 10, 2010 at 3:33 PM, David Hláčik <david at hlacik.eu> wrote: > Hello I will briefly draw the situation > > Router with one interface eth0 , to local network 10.123.0.0/16 > > on a local network ADSL modem with IP 10.123.10.11 > > I want to use 10.123.10.11 as a connection to internet . > > Because of that I have created default route "ip route add default via > 10.123.10.11 dev eth0" > > I do not want my ADSL modem to do NATing , since it shows to be slow. > I have configured static route on ADSL modem "10.123.0.0/16 via > 10.123.10.11" which ensures traffic comming from internet will ge to > my router. > > Now i want to configure NATTING. My concern is, how to create iptables > rule which will match only the traffic going via 10.123.10.11 and only > for this will make SNAT. > If I will do iptables -A POSTROUTING -o eth0 --j SNAT --to-source > 213.194.242.198 this will not work . I need to add there a magic words > that only traffic going via 10.123.10.11 should be SNATted. > > Please help, > > Thank you in advance. > > David >