On Thu, January 5, 2006 13:07, Rubén Navarro Huedo wrote: ... > We need to do this: > Our server has 2 ip's. One is used only for SMTP outgoing and the > other for all the rest. > All is running fine except that our smtp outgoing IP has problems > conecting ONLY to one smtp server. Could it be that it's an smtp problem (eg PIX fsck-up) ? > What we want to do is: all from our server to that smtp server change > the source IP and use the other one that we have in our server. > Do i explain ok? My english is not very good :( > We are trying this with this: > > iptables -t nat -A OUTPUT -p tcp -j SNAT -d ip_wanadoo --to > nuestra_otra_ip > > But: > iptables: Invalid argument > > We are using OUTPUT becouse we think that it is the correct. > > Can this be done? What are we doing badly? man iptables : "SNAT This target is only valid in the nat table, in the POSTROUTING chain." iptables -t nat -A POSTROUTING -j SNAT -d ip_wanadoo \ -p tcp --dport 25 --to nuestra_otra_ip Gr, Rob