share internet connection using pointopoint method

Question

I'm trying to share internet connection between two host using ethernet device and using pointopoint method but havent yet get any proper response,
Here is the chronology:

setting ip :

host a

ifconfig eth0 10.0.1.1 pointopoint 10.0.1.2 netmask 255.255.255.255

host b

ifconfig eth0 10.0.1.2 pointopoint 10.0.1.1 netmask 255.255.255.255

setting router(host A):

from host a, which host a had set ip_forward to '1' (sysctl and /proc/net/ipv4/)

iptables -A PREROUTING -t nat -j MASQUERADE

and on host b I've done on cli

route add default dev eth0

with /etc/resolv.conf contain

nameserver 8.8.8.8

when pinging google the response like this :

PING google.com (209.85.231.104) 56(84) bytes of data.
From 10.0.1.2 icmp_seq=2 Destination Host Unreachable
From 10.0.1.2 icmp_seq=3 Destination Host Unreachable

oh my? where is my exactly fault ?

thanks in advance guys :)

Answer 1

First, don't use pointopoint.

Secondly, your route on Host B should be:

route add default gw 10.0.1.2

You want to set your iptables rule to the following:

iptables -A PREROUTING -t nat -i eth0 -o ppp0 -j MASQUERADE

If you can provide more information I'll expand this answer to help you better.