From: Adam Forsyth (forsytad@luther.edu)
Date: Wed Sep 26 2001 - 21:12:54 CDT
Netreg is great, I love it compared to any other method we've used to
accomplish the task of distributing ip addresses to users of our ResNet,
and making them register the fact that they have a computer plugged into
it.
I've got one little problem though. Since we started using it a month
ago, I've been noticing that there is nothing to stop a student from
picking an address from the registered range(randomly off the top of his
head without consultation with the DHCP server), and manually assigning
it, the proper gateway and a DNS server to his computer. He can then go
on his merry way happily using the network without first having
registering his connection with our netreg server.
I can think of a couple of potential possible solutions to this problem.
1.) We could make the NetReg/DHCP/DNS server also work as a router and
make it the default gateway for this network. We'd have to create a
script that went through the leases file and allowed access to all of
registered addresses and blocked all of the rest of the addresses in
the entire subnet.
2.) Another thought I've come up with is that maybe we could come up
with a crazy and overly complicated subnetting scheme such that it'd be
much more complicated to come up with a combination of addresses and
subnet masks such that it'd be much more difficult to pick a combination
that would work and that we'd route for you. I don't think I'm enough
of a router guru to come up with this scheme, and furthermore if your
only motivation in dodging my system is to obtain a static ip address
that I don't randomly change once a week, and you don't mind being
registered, you'd just register, and then copy down all of the values
and assign them to yourself manually.
Has anyone already come up with a solution to this
problem......hopefully more elegant, simple to implement and fool-proof
than mine? If so, I'd appreciate hearing your advice.
Thanks in Advance for your help
-- Adam Forsyth Senior Systems Administrator Luther College********************************************************************** To unsubscribe from this list, send an e-mail message to majordomo@southwestern.edu containing a single line with the words: unsubscribe netreg Send requests for assistance to: owner-netreg@southwestern.edu **********************************************************************
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