Re: Re: [Micronet] Upgrades and Security Requirements

On Jun 23, 2004, at 12:18 PM, Johnathon P Kogelman wrote:

> (is there really anyone left on Campus that solely supports Mac?).

Yes. There are people on campus who only support Macs. Believe it or
not, some departments are entirely Mac. The tendency on campus, with
Windows-dominated thinking, is to assume that Macs have the same 2-3%
presence as the outer world. This translates into ignoring them like
the Campus AD did last month with the NTLMv1 abatement. They didn't
test how NTLMv2 would affect Mac connectivity with Windows shares until
after the change took place and people complained that they couldn't
connect. There would be more tech cohesion on campus, and more user
productivity, if Windows admin folks took Macs more seriously. As
Michael Sinatra pointed out in July 2003 (see message below), 15% of
campus is using a Mac.

> From: michael@rancid.berkeley.edu
> Subject: Re: [MAGNet] administrative staff using Macs?
> Date: July 22, 2003 12:12:54 PM PDT
> To: gmerritt@uclink.berkeley.edu
> Cc: magnet-list@uclink.berkeley.edu
>
>
> On Mon, 21 Jul 2003, Greg Merritt wrote:
>
>>
>> Our administrative office staff (accounting, payroll,
>> personnel, grants, etc.) here at the Institute of Transportation
>> Studies use mostly Macs. What other departments/groups on campus are
>> predominantly Macintosh for administrative functions?
>
> This discussion reminded me of something Tom H. asked me to do a long
> while back, which is to provide a *rough* estimate of the number of
> Apple/Mac devices on campus using CNS's ARP cache data. So here's
> what I
> did:
>
> CNS maintains "snapshots" of each day's ARP data over the past six
> months.
> I looked at <http://standards.ieee.org/regauth/oui/index.shtml> and
> found
> all of the registered MAC address prefixes that belong to Apple
> Computer.
> I then chose some representative days and searched for the set of Apple
> MAC (pardon the pun) addresses for each day. I removed duplicates and
> compared the resulting number to the days full data (again with
> duplicates
> removed). Duplicates would be caused by one machine changing
> networks/IP
> addresses during the day, changing airbears networks or getting a new
> dhcp
> address durning the day, etc. I then computed the percentage of Apple
> MAC
> addresses to the total. This would represent the percentage Apple/Mac
> devices powered on and connected to the network at any time of the day.
>
> I picked some representative days and here's what I found (each day is
> measured roughly from midnight to midnight):
>
> Monday, July 21, 2003: 3283 Apple, 20423 total (16.1%)
> Saturday, July 19, 2003: 1811 Apple, 14241 total (12.7%)
> Thursday, June 5, 2003: 3404 Apple, 20107 total (16.9%)
> Tuesday, April 15, 2003: 4227 Apple, 27077 total (15.6%)
> Tuesday, April 30, 2003: 4212 Apple, 27226 total (15.5%)
> Monday, March 17, 2003: 4127 Apple, 26615 total (15.5%)
> Saturday, February 8, 2003: 2338 Apple, 19351 total (12.1%)
> Thursday, Jan 23, 2003: 4128 Apple, 26444 total (15.6%)
> Thursday, Dec 19, 2002: 3445 Apple, 22457 total (15.3%)
> Wednesday, Oct 30, 2002: 4100 Apple, 26593 total (15.4%)
>
> CAVEATS:
>
> 1. We do not poll ARP data for the entire campus. Specifically, the
> modems, EECS, University Extension, Space Sciences Lab, University
> Health
> Services, and UC Printing are not polled, for a variety of technical
> reasons. Also any host that is behind some sort of NAT box or
> non-briding
> firewall will NOT show up in the ARP cache. The survey DOES include
> the
> Res Halls.
>
> 2. Many network devices show up in the ARP cache and some have multiple
> MAC addresses that may or may not show up in the cache. CNS has
> roughly
> 1500 manageable network devices on campus. These MAC address do not
> represent actual USER HOSTS, so the percentage of Apple/Mac devices
> compared to actual user hosts may actually be higher.
>
> 3. Some Apple/Mac devices may be using third-party networking devices,
> which would NOT show up in this survey as an Apple/Mac device. It's
> also
> possible that some Apple-branded devices *may* use third-party
> chipsets,
> which may or may not show up as an Apple MAC address. This may imply
> that
> the number of Apple devices is higher than the percentages show, but
> it's
> not completely unknown what effect this has, if any.
>
> 4. This survey also includes network-attached printers and other
> devices.
> It's possible that an all-mac shop uses an HP network printer or that
> an
> all-PC shop uses an Apple network printer, but I have no idea how this
> might skew the overall results, or if anyone cares.
>
> END OF CAVEATS
>
> The results look pretty consistent, with an obvious drop-off on
> weekends
> of the total number of connected hosts. (It's nice to see that some
> people turn their computers off over the weekend, thereby saving the
> University money and making it (slightly?) less likely that we'll be
> taking pay cuts soon.) Interestingly, the Macintosh percentage drops
> on
> the weekend also. I draw the following possible conclusions from this,
> with varying credibility:
>
> 1. A higher percentage of Apple/Mac computers are used for
> administrative
> applications; hence, the higher weekday percentage.
>
> 2. Apple/Mac users are more environmentally and pay-cut conscious than
> their Windows and (especially) Unix bretheren and sisteren. They are
> therefore more likely to turn off their computers or put them into
> power-saving mode on weekends.
>
> 3. Apple/Mac users are more possessive of their weekend leisure time
> and
> are less likely to come to work on weekends. (I am sure some Mac fans
> will say that they don't *have* to come to work on weekends because
> they're so productive on their Macs.)
>
> You can draw your own conclusions, too.
>
> michael
>
>
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>

Mark Ingles
643-3107
Departmental On-site Computing Support
264 Evans Hall http://docs.berkeley.edu/

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Received on Wed Jun 23 18:18:51 2004