yes, this is a crazy subject. I have 4 ADSL lines to the same provider, which even have the same gateway. Those lines are connected to the same machine (more crazyness: even connected to the same nic. it works fine, I swear). this machine will serve this conenction to a local net. so, I setup the ifaces correctly, everything works. I add balancing using this command: # ip route replace default nexthop dev ppp0 nexthop dev ppp1 nexthop dev ppp2 nexthop dev ppp3 I try this downloading a iso image using BT and checking with iptraf. the load gets balanced. fine. then I issue this command to setup masquerading for each ppp line: # for i in 1 2 3 4; do > sudo iptables -t nat -A POSTROUTING -s 172.16.16.0/22 -o ppp$i -j MASQUERADE; > done now I try to do the same download from a machine in the intranet and all the traffic goes to only one of the ppp lines. is important to note that this setup was successfully working in a previous incarnation of the gateway (this time each ppp line was attached to its own nic, but I think this is irrelevant, as balancing *is* somewhat working) running a 2.4.7 kernel from RedHat-6.0 (yes, *that* old; reason why we're trying to replace it with something newer). so, any ideas? if you need more data, don't hesitate to ask. -- Marcos Dione Departamento de Cómputos Facultad de Ciencias Químicas - UNC ---------------------------------------------------------------- Facultad de Ciencias QuÃmicas - Universidad Nacional de CÃrdoba _______________________________________________ LARTC mailing list LARTC@xxxxxxxxxxxxxxx http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc