On Fri, Feb 01, 2002 at 02:41:49PM -0800, David Koski wrote: > Given the network map below, I am able to ping any ip on all networks from the > linux box. However, from the cisco router, I cannot ping past eth1 on the linux > box. The reverse is also true; I cannot ping past eth0 from a host on LAN. > proxy-arp is enabled on the linux box and the route to a.b.c.0/24 is added to > the cisco router. I haven't a clue why either way, I can only get to the far > side of the linux box but no further. I do not care about your ascii art, just about the following: ip route show /proc/sys/net/ipv4/conf/eth[012]/proxy_arp /proc/sys/net/ipv4/conf/eth[012]/rp_filter /proc/sys/net/ipv4/ip_forward 1) proxy_arp must be set to 1 2) rp_filter: you might start with 0 3) ip_forward should be set to 1 4) all routes must be sane: ip route add a.b.c.0/28 dev eth0 ip route add a.b.c.0/24 dev eth1 ip route add 192.168.1.0 dev eth2 ip route add default via a.b.c.1 Then you should be able to arp-ping the whole world from anywhere inside your network. -- <ard@telegraafnet.nl> Telegraaf Elektronische Media http://wwwijzer.nl http://leerquoten.monster.org/ http://www.faqs.org/rfcs/rfc1855.html Let your government know you value your freedom. Sign the petition: http://petition.eurolinux.org/
