Re: Public Network, routing.

From: Hugo Bokman (hugo@artware.nl)
Date: Thu Jan 27 2000 - 04:37:40 EST


Fredrik Bergström wrote:

> Dear Linux-net'ers,
>
> Im trying to set up a linux router to connect our local net onto the
> internet.
>
> All machines in our network have public IP numbers.
>
> Here is the setup:
>
> ------------
> | Internet | gw 10.10.10.129
> ------------
> |
> | 10.10.10.130 (eth1)
> (Router)
> | 10.10.10.156 (eth0)
> |
> ----------------+----------------
> | | |
> Comp1 Comp2 Comp3
> 10.10.10.144 10.10.10.149 10.10.10.145
>
> This is the setup I want, I got a 255.255.255.224 netmask.
>
> The problem is that when I send a ping from Comp3 the ping will get
> forwarded from eth0 onto eth1 but I wont get any answer back, ipchains
> will not log anything more then input, forward and output for the ping
> packet.
>
> I've added the gateway to default route, the machines is added so that
> when I ping from the router to the Internet or to a machine it will
> succeed.
>
> I would appreciate some help on this, or some pointers, links or
> thoughts about routing this way.
>
> Regards, Fredrik Bergstrom
>
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Hi Fredrik,
I may be mistaken but if you're using 255.255.255.224 for a netmask, then
the ip-addresses of your router map into the same subnet: the one from 128
(networkaddress) upto 159(broadcastaddress). This will not be your
intension.

If you use routed as your sole means of routing, you'd better use the "-s"
(from supply routes) option (using REDHAT you have to patch it in).
Hope to have been of service,
Hugo.

--
Hugo Bokman (0653416393)    A R T W A R E    B.V.
Waardsedijk 15      3417 NA  Snelrewaard
ph:(+31) 348472005     fx:(+31) 348472097
hugo@artware.nl      http://www.artware.nl

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