What's the routing table in host and server looks like ? if there is only one connection on both of them , the routing table in host only need one entry as : 0.0.0.0/0 -> xx.yy.88.100 and server need : 0.0.0.0/0 ->xx.zz.110.145 You don't need to add host route explicitly in the router becasue the subnet on network interface is included in routing table by default. Another indication is "have you enabled iptable on router to block connection between different subnet?" James Shen > Hello, > > I am attempting to construct a (simple?) router based > on Linux 2.4 with iproute2. > > I have 3 ethernet cards on the router, with eth0 > connected to a host,eth1 connected to a server and > eth2 connected to another computer. > > xx.yy.88.101 > +--------+ > | | > | host | > +---+----+ > | > xx.yy.zz.aa | > | |eth0 - xx.yy.88.100 > | | > +---------+ | +----------------+ > |another | eth2 | | > |computer +---------+ router | > | | | | > +---------+ +-------+--------+ > xx.yy.zz.ab | > | eth1 - xx.zz.110.145 > | > +---+-----+ > | | > | server |xx.zz.110.148 > | | > +---------+ > > I am simply trying to get traffic through eth0 to eth1 > so it can get to the server and get back out, but so > far I can't ping the server through the router, > although the router itself is capable of pinging the > server (so the link eth1 is active). And I've verified > that eth0 is also active as the router and the host > can ping each other. > > So how do I get the router to pass traffic through to > the server? > > I've tried > # ip route add to unicast xx.zz.110.148 dev eth1 > RTNETLINK answers: File exists > > and yet the host still can't ping the server. > > And I've tried making eth0 "promiscuous" > # ifconfig eth0 promisc > but that doesn't help either. > > Anyone know the magic incantation that I need? > > -- > Jeremiah > > __________________________________________________ > Do You Yahoo!? > Get personalized email addresses from Yahoo! Mail > http://personal.mail.yahoo.com/ > > _______________________________________________ > LARTC mailing list / LARTC@xxxxxxxxxxxxxxx > http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://ds9a.nl/2.4Routing/
