RE: ip masquerading/subnets

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ok...


now i've screwed something up, such that i can't even ping the eth0 card
when i'm on box2!!!

i've tried modifying the route, and iptables cmds. but i'm screwing
something up....



-----Original Message-----
From: fedora-list-bounces@xxxxxxxxxx
[mailto:fedora-list-bounces@xxxxxxxxxx]On Behalf Of bruce
Sent: Monday, November 26, 2007 12:51 PM
To: 'For users of Fedora'
Subject: RE: ip masquerading/subnets


Hi Mike..

and adding this route to the box2, will allow me to ping box2/eth0 from
box1?

or are you saying that i'd have to add the route to box1. if i have to add a
route to box1, then i'd have to add a route to every box in the system...
which isn't what i'd want to do.

again.. thanks for the basic understanding..

thanks



-----Original Message-----
From: fedora-list-bounces@xxxxxxxxxx
[mailto:fedora-list-bounces@xxxxxxxxxx]On Behalf Of Mike Wright
Sent: Monday, November 26, 2007 12:20 PM
To: For users of Fedora
Subject: Re: ip masquerading/subnets


bruce wrote:
> hi john...
>
> i might be missing/lost some emails... so let me start at the very
> beginning!! bear with me if you find yourself repeating something you've
> already stated...
>
> my initial system (two boxes, nothing between them)
>
> windows                       linux
> box1     ----- >>> ------      box2 >>>>>> (future separate lan box)
>   eth0    (wireless)      ath0      eth0
>
> box1
> eth0 - 192.168.1.3
>
> box2
> ath0 - 192.168.1.5
> eth0 - 192.168.2.5
>
> from box1, i can ping 192.168.1.5
> from box1, i can't ping 192.168.2.5
>
> from box2, i can ping box1 (192.168.1.3)
>
> so, what do i/should i do to connect/ping box2/eth0 from box1?

The linux box is now a router and from the point of view of box1 ath0 is
just another gateway.  box1 needs to know about any routes available to
it and it apparently already has a default route which points to your
first router.  default routes are the ones taken when the desired
desitination ip is not already specified in the routing table(0).  Since
you know where 192.168.2.5 is you can add a specific route for that and,
in fact, since you want to add a future box to that lan, and assuming
it's a /24 bit netmask, you would use something like this:

(as root)
/sbin/ip route add 192.168.2.0/24 via 192.168.1.5 dev eth0

hth,
Mike Wright

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