> > Hello all,
> >
> > I have a system setup with two phones/interfaces (ppp0 and ppp1). I access
> > the internet via these two interfaces only.
> >
> > I have the following rules in my iptables:
> >
> > iptables -t nat -A POSTROUTING -o ppp0 -j MASQUERADE
> > iptables -t nat -A POSTROUTING -o ppp1 -j MASQUERADE
> >
> > and yet when a machine on my network uses my machine as the gateway to ping
> > outside, packets travel on the wrong link causing change of ip address of
> > the phones. I have tested this using ethereal and it clearly shows a ppp0
> > packet (src add of ppp0) outgoing on ppp1, as I was capturing on ppp1.
> > Also, iptables is masquerading as it shows the number of packets it
> > masqueraded.
>
> I agree with you that the above rules ought to ensure that packets going out
> of each interface have the appropriate source address.
>
> What does your routing table look like (presumably you are using iproute2 to
> balance traffic, or route based on source etc, to share the two links)?
Yes I am using iproute2 and the Routing Table is as follows
206.47.201.1 dev ppp1 proto kernel scope link src 204.101.96.143
204.101.237.225 dev ppp0 proto kernel scope link src 69.158.211.67
169.254.0.0/16 dev eth0 scope link
192.168.0.0/16 dev eth0 scope link
127.0.0.0/8 dev lo scope link
default equalize
nexthop via 204.101.237.225 dev ppp0 weight 1
nexthop via 206.47.201.1 dev ppp1 weight 1
Obviously when the ip addresses change this table is updated.
Thanks
Dravya
