Home Network Setup Problem

Kent Stewart kstewart at owt.com
Fri Sep 9 07:58:54 PDT 2005


On Friday 09 September 2005 07:39 am, deltaski at earthlink.net wrote:
> Thank you all, who have considered this message!
>
> I am learning BSD with 3 successful units. 1-100mhz pent. running
> 4.11 1-180mhz pent. running 5.4 and one 266mhz AMD running 5.4
>
> I have learned the ins and outs of X, changing rc.conf and am quite
> good at reinstalling the system after a few "learning" adjustments.
>
> Just for fun and my own enjoyment in learning, I have now accepted
> the challenge of my own home network. I have been able to connect all
> boxes to my DSL router with DHCP and manual IP assignments and
> changed/setup NIC's with ifconfig. My reference materal is the
> Handbook from FreeBSD.org and "The Complete FreeBSD" by Greg Lehey.
>
> Now the problem!
>
> DSL is 192.168.1.1 - Box B has two NIC's rl0=192.168.1.100 netmask
> 255.255.255.0 and is connected only to 192.168.1.1 ping works/outside
> internet works.
> Box B second NIC rl1=172.16.1.1 netmask 255.255.255.0 and is
> connected to a standalone switch/router.
>
> Box A has one NIC eth0=172.16.1.35 and is connected to the standalone
> switch/router. Box A can ping 172.16.1.35 and 172.16.1.1 on box b. It
> can NOT ping 192.168.1.1 or access any outside internet.
>
> >From Box B keyboard, I can ping
>
> 192.168.1.1/192.168.1.100/172.16.1.1/172.16.1.35
>
> >From Box A keyboard, I can ping only 172.16.1.35/172.16.1.1
>
> I have tried ifconfig rl0 192.168.1.100 172.16.1.1 netmask
> 255.255.255.0 among many other configurations without success.
>
> >From my reading, I think the error of my ways is in the Box B
> > between nic rl0
>
> and rl1. The data packets are not being forwarded from rl1 to rl0 or
> rl0 to rl1. Somewhere I have missed something. If anyone could point
> me in the correct direction, it would be greatly appreciated.
>

In your /etc/rc.conf, you need to tell machine B that it is a gateway. 
Since you are using RFC1918 IP addresses, you probably should turn on 
natd. It is much easier if the switch is right after your DSL because 
then, you don't need B to be a gateway and you don't need to run ipfw 
to get natd.

Kent

-- 
Kent Stewart
Richland, WA

http://users.owt.com/kstewart/index.html


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