Re: [LARTC] I need some advise from a routing Guru !!

[Ramin Alidousti <ramin@UU.NET>]

Hello,

I'm also new to this concept but from what I understand:

1) If you query from 192.168.1.0/24 it works fine. Doesn't it?

2) From 192.168.2.0/24 and 192.168.3.0/24, the packets go to the
   Internet and come back through your first carrier to hit your
   DNS servers. Is this right?

If these two assumptions are correct, then your problem is those
default routes per private /24's. I think that you need to set
static routes to your DNS servers in tables 2 and 3.

This might or might not be the solution to your problem. If so,
glad to have been able to help; if not, sorry but I also said
that I was new to all these.

Ramin

On Wed, Apr 18, 2001 at 08:27:09AM -0300, Krepper Guillermo wrote:

> Hi, let's get to bussisnes ...
> This is what I have
> 
>                                                 +--------------------------+
>                         eth0 ----------------- |                           |
>                                                  |        LINUX          | ---------------- eth1
>                         eth2 ----------------- |                           | 
>                                                  |        SUPER        | ---------------- eth4
>                         eth3 ----------------- |                           |
>                                                  |        ROUTER      |
>                                                  +--------------------------+
> 
> 
> Internet Connections:
>     eth0: 200.1.1.0/24
>     eth2: 200.2.1.0/24
>     eth3: 200.3.1.0/24                    
>     from 3 diferent carriers
> 
> Private LAN:
>     eth1: NAT -->     192.168.1.0/24
>                              192.168.2.0/24
>                              192.168.3.0/24
> 
> Internet Services (DNS, WEB, MAIL, etc)
> 
> First of all I'll say that Traffic Controller works 10 points !!!!!
> 
> Routing is doing ok, but I'm not shure if it's here were I'm making all the trouble. So here is how I do it.
> 
> ip rule add from 192.168.1.0/24 table 1
>     ip route add 192.168.1.0/24 via 192.168.1.254 dev eth1 table 1             ( so machines can ping eachother )
>     ip route add default via 200.1.1.254 dev eth0
> 
> ip rule add from 192.168.2.0/24 table 2
>     ip route add 192.168.2.0/24 via 192.168.2.254 dev eth1 table 1             ( so machines can ping eachother )
>     ip route add default via 200.1.2.254 dev eth2
> 
> ip rule add from 192.168.3.0/24 table 3
>     ip route add 192.168.3.0/24 via 192.168.1.254 dev eth1 table 1             ( so machines can ping eachother )
>     ip route add default via 200.1.3.254 dev eth3
> 
> 
> I think this is ok, it worked, but .......
> 
> Well here is my problem on eth4 I would like to put a dns, httpd, smtp, pop and a proxy. All of this have IP that are part of (eth0). 
> DNS1 = 200.1.1.1    DNS2 = 200.1.1.2
> 
> I made all connections work with this DNS but when someone querys the dns, the paket goes to the Internet an then comes back. Is there a way of redirecting or routing it to eth0 before it goes to take a trip?
> I tested with iptables DNAT, ip route add 200.1.1.1/36 dev eth4 ..... and did not work. 
> Can somebody give me an advise or a clue on how should I do something like this? an with the proxy? how can I specify on witch eth to go out depending from where it came from TOS Mark?
> I olso would like a recomendation on some good books, please.
> 
> That's all folks, 
> 
> 
>                         well thank you verry much for the advise.
> 
> Krepper Guillermo (Billy)
> 
> 
> 

-- 
Ramin Alidousti                                         ramin@UU.NET
Advanced Development                             tel +1 703 886 2640
UUNET, A WorldCom Company                        fax +1 703 886 0536

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