[OLSR-users] internet gateway (ip forward?) problem

Sverre Rakkenes (spam-protected)
Wed Feb 23 09:30:38 CET 2005


Thanks, for input.

so, now i have set up the system behind a NAT, so that i can play
around with my addresses and networks. i have used the 192.168.16.0
network for my base-station and wired network. and i have used
192.168.17.0 network for my ad-hoc part of the network. (both with
255.255.255.0 mask ). I found the same problem... i could only ping
interfaces that were running olsrd.

then I tried to use internet sharing on my mandrake router ...  by
following these instructins:

iptables -P INPUT ACCEPT
iptables -P OUTPUT ACCEPT
iptables -P FORWARD DROP

iptables -A FORWARD -i ath0 -o eth2 -m state --state
ESTABLISHED,RELATED -j ACCEPT
iptables -A FORWARD -i eth2 -o ath0 -j ACCEPT

iptables -t nat -A POSTROUTING -o ath0 -j MASQUERADE
(...)
and now it works..but, am i really using olsrd here or, what? is there
another way to do it, that is more direct use of the olsr protocol?

best regards,

SvR


On Tue, 22 Feb 2005 14:27:51 +0100 (CET), Andreas T√łnnesen
<(spam-protected)> wrote:
> Hi,
> 
> Since you are not using NAT in your GW you must make sure the GW will
> route correctly. Having two interfaces on the same subnet is really asking
> for trouble when you are going to act as a router(well, really in any
> situation) :) In this case the GW will probably route traffic out the
> interface with the first entry in your routing table, so if the GW node
> has:
> 203.159.31.0/24   eth0
> 203.159.31.0/24   wlan1
> there is a large chance all traffic destined for 203.159.31.0/24 will be
> routed via eth0. This does not go for olsrd control-traffic since this
> traffic is using fixed routing(bound to interfaces).
> So for this to work you should IMO either set up NAT *ugh* or set up
> subnets of the 203.159.31.0/24 network on your two interfaces on the GW.
> 
> - Andreas
> 
> > hi there,
> >
> > I am running a pc with two wlan cards, one of wich is connected to the
> > internet trough a base station (on channel 1). the other card is
> > connected to a second laptop trough an adhoc network running on a
> > different channel (11). The two computers can see each other, but I
> > have trouble sharing that internet connection with the ad-hoc network.
> > I have tried using the dynamic gateway pluggin (and it seems to work,
> > it is reporting a internet connection), and also the static internet
> > sharing, but no matter what i try the laptop that only has one wlan
> > card, can not see any non-olsr machine. it can however see any machine
> > running olsrd.
> >
> > how can i enable it to "ping" a pc not running olsrd.
> >
> > PS: both my ad-hoc network and my wired/base station hosts are running
> > on the same network (203.159.31.0) is that a problem? do they need to
> > be on different networks for the routing to work?
> >
> > hope you can give me some hints, maybe "explain like i am a six year
> > old" how to share an internet connection with olsrd.
> >
> > I am running the 0.4.8 version, on a mandrake linux 10.1
> >
> >
> > --
> > /*
> > www.rakkenes.org
> > */
> > _______________________________________________
> > olsr-users mailing list
> > (spam-protected)
> > https://www.olsr.org/mailman/listinfo/olsr-users
> >
> 
> 
> ---------
> Andreas T√łnnesen
> http://www.olsr.org
> 


-- 
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*/



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