From: Martin German (mgerman@uoguelph.ca)
Date: Mon Mar 17 2003 - 12:14:13 CST
Apply this same 'clarification' to my account as well - The proposed system
which I described would work exactly as the one Matthew has described for
their Administrative computers does, except that this would be our
mechanism used for _all_ registrations.
- Martin
________________________________________
Martin German - ext. 52820
Programmer / Systems Analyst
Computing & Communications Services
University of Guelph
________________________________________
Look around you... Everything that you do affects your surroundings, the
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On Mon, 17 Mar 2003 11:16:35 -0500, Matthew Perry <mperry4@mail.lesley.edu>
wrote:
> Hi, Here at Lesley University we have two NetReg setups. One is for the
> students that gives out Dynamic addresses. The other we use on our
> Administrative computers, this one gives out static addresses.
> Clarification, We use NetReg to hand out static IPs via DHCP. We have
> perl using a dbm to keep track of what IPs are in use. The static IP are
> chosen via a perl script the looks at what segment they are on and gives
> them the next free IP. This adds a layer of complexity to NetReg cause
> it has to check for a free IP before it adds it to the dhcpd.conf.new
> file. This way the administrative computers always get the same IP but
> are also authenticated via NetReg, so we know who has what without having
> to go to each computer and set the IP manually. I would imagine that
> they use something similar to this for there students.
>
> At 10:32 AM 3/17/2003 -0500, you wrote:
>> At 1:07 AM -0500 3/16/03, Michael King wrote:
>> Baron,
>>
>> If you don't mind, why do you want to assign Static addresses to your
>> students? I personally see this as an administrative nightmare that,
>> that quite honestly, defeats the entire purpose of DHCP. I couldn't
>> even fathom trying to keep track of the address assigned to each student
>> (all 2000 of them) never mind the huge rush at the beginning of the
>> semester when they all decide within one hour of each other they need
>> there computer working.
>>
>> For your own sanity, I would reconsider. Not that doing it the way I
>> am doing it is correct. I know one of the major contributors to NetReg
>> runs his dorms all static IP's, and I'm pretty sure Rutgers still runs
>> it's ResNet program with all static IP's. (they have around 10,000
>> residents)
>>
>> Mike
>>
>> Here at Saint Mary's College, we've been assigning fixed addresses from
>> the outset. It hasn't been a problem. Our modified netreg code manages
>> the hostnames and IP addresses. This was something our sysadmin required
>> when I began implementation of netreg.
>>
>> Assigning addresses has its advantages. It is easier to track down
>> machines with viruses, for example. Plus, this ended up liberating the
>> "known hosts" pool which allowed me to use DHCP to "block" a machine
>> from the Internet and our network if it's known to have a virus.
>>
>> For us, scalability hasn't been an issue since we only have around 1250
>> registrations. Perhaps a database back-end would make such a scheme more
>> manageable in larger networks.
>>
>> I plan to present this and other enhancements I made to netreg 1.2 at
>> the ResNet 2003 Symposium in late June. Though my code is very specific
>> to our network, it's open source, as per the GPL.
>>
>> --
>>
>> ____________________________________________________________________
>> Steve Hideg
>> Integrated Technologies Programmer
>> Saint Mary's College, Notre Dame IN
>> <hideg@saintmarys.edu>
>> ____________________________________________________________________
>> "It is inappropriate to require that a time represented as seconds
>> since the Epoch precisely represent the number of seconds between
>> the referenced time and the Epoch"
>> --IEEE Std 1003.1b-1993 (POSIX) Section B.2.2.2
>> **********************************************************************
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>> **********************************************************************
>
> Matthew Perry
> mperry4@mail.lesley.edu
> Network Technician
> Lesley University
> voice: 617-349-8772
>
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