Re: Internal PC/external Gateway

["Sadus ." <sadus@swiftbin.net>]

When i run this:
ip rule add from 192.168.1.3 table T2

i get this error:
RTNETLINK answers: Invalid argument


On Sat, 2005-05-14 at 15:00 -0400, Jason Opperisano wrote:

> On Sat, May 14, 2005 at 09:30:10PM +0300, Sadus . wrote:
> > Before continuing, thanks alot for your help.
> > 
> >                                            +------------+        
> >                                            |            |       |
> >                                        ----+ Provider 1 +-------
> > 192.168.1.2                          |   | 10.2.2.1  |     /
> >    PC1__/  \_         +------+-------+ |   +------------+    |
> >    _/        \__      |              | |                    /
> >   /             \     | 10.2.2.253 | |                    |
> >  | Local network -----+Linux GW  eth0|-                     |Internet
> >   \_           __/    |192.168.0.141 |                   |
> >     \__     __/       |              | |                    \
> >    PC2 \___/          +------+-------+ |   +------------+    |
> > 192.168.1.3                          |   |            |     \
> >                                        ----+ Provider 2 +-------
> >                                            |192.168.0.173     |
> >                                            +------------+        
> > 
> > so a little reminder. i just want 192.168.1.3 to take Internet from
> > 192.168.0.173
> > my GW has as you see has 2 IPs in eth0, and i can reach both of my
> > Providers with that setup.
> > 
> > btw, is there any article to read about the priority of rules while
> > writing an iptables script?
> 
> yeah--first match wins for all terminating targets.  a good tutorial in
> general is:
> 
>   http://iptables-tutorial.frozentux.net/iptables-tutorial.html
> 
> so it looks like we need:
> 
>   iptables -t nat -A POSTROUTING -o eth0 -s 192.168.1.2 \
>     -j SNAT --to 10.2.2.253
>   iptables -t nat -A POSTROUTING -o eth0 -s 192.168.1.3 \
>     -j SNAT --to 192.168.0.141
> 
>   echo 202 T2 >> /etc/iproute2/rt_tables
> 
>   ip route add default via 192.168.0.173 table T2
> 
>   ip rule add from 192.168.1.3 table T2
> 
>   ip route flush cache
> 
> hope this helps...
> 
> -j
> 
> --
> "Spectator #1: Oh my God. I'm so offended. I'm going to do something
>  about this.
>  Spectator #2: Mike, there's not really anything you can do.
>  Spectator #1: Wow, you're right. I guess I'm just going to have to
>  develop a sense of humor, huh?"
>         --Family Guy
>