Date: Fri, 26 May 2000 16:42:45 -0700 From: Doug Barton <DougB@gorean.org> To: Andy Dills <andy@xecu.net> Cc: Jan Grant <Jan.Grant@bristol.ac.uk>, freebsd-questions@FreeBSD.ORG Subject: Re: promiscuous ethernet Message-ID: <392F0BF5.A87C26E6@gorean.org> References: <Pine.GSO.4.21.0005261235200.16951-100000@shell.xecu.net>
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Andy Dills wrote:
> I'm writing a perl script which calls "tcpdump -n -q arp", and monitors
> output. When it (the script) sees a line such as:
>
> <timestamp> arp who-has <user gateway IP> (<MAC Addr>) tell <user.IP>
>
> it will ifconfig <user gateway IP> as an alias to xl0. NAT, which will be
> run with -dynamic, will then begin address translation for the user.
>
> I'll redirect any and all DNS requests to the local DNS server.
>
> So, I belive I've at least accomplished the theory behind it. Can anybody
> point out a flaw?
Given the constraints of your project I think I'd probably approach it
the same way (although don't take that as gospel). I do understand what
you mean by "technically unfeasable" not being an acceptable answer. :)
As an aside, if you are dealing with all in-office stuff, I would
suggest setting up the DHCP server anyway, and converting all NEW
installations to that. Then at some point in the future the number of
legacy installs will be small enough that you can simply go around and
fix them.
Doug
--
"Live free or die"
- State motto of my ancestral homeland, New Hampshire
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