[ale] Linux box as a router w/DHCP

[Jeff Hubbs]

Seems that SentryCD became abandonware in March '06.

- Jeff

Charles Shapiro wrote:
> Ooh, I have exactly this setup, using sentryCD  (
> http://www.linux.com/howtos/Sentry-Firewall-CD-HOWTO-1.shtml ) on a
> machine with 2 NICs, a floppy drive, and no hard drive.  I think it
> has, like, 128 mb on a PII or so motherboard. You don't need a lot of
> power to run one of these things -- betcha you could pick up a machine
> capable of doing it for $80 or so at MicroSeconds.. I really likes
> SentryCD. It is a bootable CD distro which uses a floppy to store
> configuration files and scripts. I also have it running my caching
> local name server.  Before I got broadband I had it running diald (
> http://diald.sourceforge.net/ ) to go through the phone lines without
> a problem (well, besides how s l o w it was).
>
> I just changed the link between the router and the modem/router
> supplied by my ISP to be static, not DHCP. Using the DHCP server on
> the modem/router means that it has to come up before the linux box in
> the event of a power failure for things to work properly. So your wife
> is always after you to fix the darn thing after a storm.
>
> I don't quite get why dhcp to your isp would be a problemo.  As long
> as you're using it and it's up, it should know what IP address it has.
> If it reboots, it'll contact the dhcp server on the far end
> automatically when it runs its client, right?
>
> -- CHS
>
>
> On 1/20/07, *Bob Kruger* <bkruger at mindspring.com
> <mailto:bkruger at mindspring.com>> wrote:
>
>     All;
>
>     I would like to use a Linux box as both a router and as a firewall
>     for a small network going out to the internet.  The issue is that
>     the IP address to the ISP varies as it is assigned via a DHCP
>     server.  This makes static routing commands problematic.
>
>     Does anyone know of a good "howto" or tutorial that addresses this
>     and would allow for some sort of dynamic routing configuration
>     when the IP address assigned by the ISP changes?
>
>     Thanks in advance for any assistance.
>
>     V/r
>
>     Bob
>
>
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