Hi,
how can I properly set proxy arping in a one to one mapped nat?
I have a router with 192.168.1.0 in one side (our lan eth0) and
192.168.50.0 in the other (other lan eth2),
plus an internet gateway (eth3)
this is the routing table
root@ipcop:~/scripts # route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref
Use Iface
192.168.50.0 * 255.255.255.0 U 0 0
0 eth2
192.168.2.0 * 255.255.255.0 U 0 0
0 eth1
192.168.1.0 * 255.255.255.0 U 0 0
0 eth0
65.19.28.0 * 255.255.255.0 U 0 0
0 eth3
172.22.0.0 * 255.255.254.0 U 0 0
0 eth2
172.16.2.0 * 255.255.254.0 U 0 0
0 eth2
172.16.0.0 * 255.255.254.0 U 0 0
0 eth2
default 65.19.28.1 0.0.0.0 UG 0 0
0 eth3
at the 50.0 side, I am routing traffic to other subnets as well, ie
172.16.2.0/23
For the applications we are running, instead of regular natting,
I am using NETMAP target of iptables,
which instead of making the packets as going out from 192.168.50.1
they are mapped to addresses at 50.0/24
i.e. when packet goes from 192.168.1.5 to 172.16.2.34 trasversing the
192.168.50.1 device
the router mangles it an makes it appear as going out from
192.168.50.5 and then translates back
everything goes fabulous, but I am having a problem with arping,
arp questions addressed to 192.168.50.0/24 are not reaching my
router's device,
I have been reading and experimenting with this a bunch,
echo 1 > /proc/sys/net/ipv4/conf/eth2/proxy_arp (an to eth0)
on the proper device is set, but still not proxy arping,
is there anybody with experience on this proxy arp issue?
Thanks,
Andres
