Hi Vincent! > > I want to route packets where the gateway is determined by the source > > address and not the destination address - is this possible with iproute2? > > > Yes. > # When sraddr belongs to ISPA > ip rule add prio $PRIO_ISPA from $ISPA_NET lookup $ISPA_TABLE > # When sraddr belongs to ISPB > ip rule add prio $PRIO_ISPB from $ISPB_NET lookup $ISPB_TABLE > # Everything else > ip rule add prio $PRIO_DEFAULT lookup $DEFAULT_TABLE > > # Default route through ISPA > ip route add table $ISPA_TABLE default via $ISPA_GW dev $ISPA_DEV > # Default route through ISPB > ip route add table $ISPB_TABLE default via $ISPB_GW dev $ISPB_DEV > > #For everything else, use a multipath route; > ip route add table $DEFAULT_TABLE nexthop via $ISPA_GW dev $ISPA_DEV > nexthop via $ISPB_GW dev $ISPB_DEV Thanks, this makes sense. I just don't understand the multipath route? Also, I take it the _TABLE variables can be arbitrary [unique] ids right? And if I want to have ISPB as the exception to the rule, I'll set ISPA's priority the highest? > > for example: > > > > ISP-A ISP-B > > | | > > +---------------+ > > | linux machine + > > +---------------+ > > > > default gw is ISP-A interface, but if packet comes via ISP-B, the ISP-B > > interface should be used instead of ISP-A interface > > IPs used on the linux machines, are private or public IPs ? public ips -- Regards Abraham BEWARE! People acting under the influence of human nature. ___________________________________________________ Abraham vd Merwe [ZR1BBQ] - Frogfoot Networks P.O. Box 3472, Matieland, Stellenbosch, 7602 Cell: +27 82 565 4451 Http: http://www.frogfoot.net Email: abz@frogfoot.net
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