Re: [WIRELESS-LAN] It's that time of year...

[Jorj Bauer]

Shhh, we don't want people to find us.

73,
Jorj, AB3AG


On 12/02/2015 02:23 PM, Patrick Campbell wrote:

It looks like we have a Ham among us judging from the frequency range
and “S” signal level instead of dBm.

Pat, WA3UOE

J. Patrick Campbell
Wireless System Design Specialist

The Pennsylvania State University

110 University Support Building 2

University Park, PA 16802

Email: jp...@psu.edu 

Office 814-865-5888
Cell 814-280-7630

*From:*The EDUCAUSE Wireless Issues Constituent Group Listserv
[mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] *On Behalf Of *Ian McDonald
*Sent:* Wednesday, December 2, 2015 2:03 PM
*To:* WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
*Subject:* Re: [WIRELESS-LAN] It's that time of year...

Hi Brandon,

I'm pretty sure wideband noise from cheap and nasty electronics can
cause havoc with most telecommunications.

Whether fairy lights are any better or worse than anything else, I doubt
it, though they are very cheaply produced, and unlikely to be very well
designed.

My Cisco 837 power supply (while still powering the router quite
effectively) developed a S9+40 noise from 1.8MHz to 30MHz, which turned
out to be down to the infamous bulgy caps, so it's not down to purchase
price either ;)

Best Regards,

--
ian

Sent from my phone, please excuse brevity and/or misspelling.



*From: *Case, Brandon J 
*Sent: *‎02/‎12/‎2015 17:52
*To: *WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU

*Subject: *[WIRELESS-LAN] It's that time of year...

The holidays are officially upon us!

http://gizmodo.com/can-christmas-lights-really-play-havoc-with-your-wi-fi-1745648879

Has anyone else gotten wind of this yet? Seems to be making the rounds here.

Thanks,
--
Brandon Case
Senior Network Engineer
IT Infrastructure Services
Purdue University
ca...@purdue.edu 
Office: (765) 49-67096
Mobile: (765) 421-6259
Fax:(765) 49-46620

PGP Fingerprint:
99CB 02D6 983C 1E2A 015F  205C C7AA E985 A11A 1251

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Re: [WIRELESS-LAN] Mac Pop UP Error

[Jorj Bauer]

I was under the impression that was a TKIP error report. Are you 
deliberately using TKIP?


-- Jorj


On 10/23/15 8:56 AM, Charlie Weaver wrote:

Has anyone else seen the pop up message on Mac computers connected to
their wireless that says “The wireless network appears to have been
compromised and will be disabled for about a minute.”?  We recently
rolled out ISE and now every wireless issue is related to the rollout.
We are using WPA2-Enterprise on the authenticated SSID, but from what I
have seen, this is not wireless vendor specific and can happen on pretty
much any type of wireless network from home to enterprise.

Thanks for any help,

Charlie Weaver

Director or network Services and Telecommunications

Georgia College

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Re: [WIRELESS-LAN] Measuring User Experience

[Jorj Bauer]

Hmm. What data do you have? User authentication time stamps could help you find 
frustrating re-authentications. Association logs could describe how users are 
or aren't roaming successfully. 
 DHCP logs could show whether or not users are having sessions interrupted 
while roaming. Signal/noise data would help qualify likelihood of packet drops. 
Association speed logs could indicate how good the client thinks the connection 
is. 

Just some quick thoughts. 

-- Jorj

Sent from my iPhone

> On Oct 22, 2015, at 7:04 AM, Williams, Matthew  wrote:
> 
> I have been instructed that I need determine a metric that reasonably 
> guestimates the end user experience of our wireless networks, without 
> procuring a system(s) that does it.  I readily admit that my head kind of 
> exploded when this directive was given.  Have any of you done this exercise 
> or have any ideas/formulas to try to calculate something like this?  Thanks 
> for any ideas that you care to share.
>  
> Respectfully,
>  
> Matthew Williams
> Manager, Network and Telecommunications Services
> Kent State University
> Office: (330) 672-7246
> Mobile: (330) 469-0445
>  
> ** Participation and subscription information for this EDUCAUSE 
> Constituent Group discussion list can be found at 
> http://www.educause.edu/groups/.

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Re: [WIRELESS-LAN] It would seem FCC just declared WLAN quarantine features illegal

[Jorj Bauer]

There are a lot of misconceptions about all of this airspace licensing and use.


The spectrum used by 2.4 GHz and 5GHz WiFi is open to non-licensed (ISM band 
part 15) use. A large part of it is also in contention with licensed amateur 
radio operation.

What that means is that a ham radio operator could set up legitimate 
communications on (e.g.) 2.4 GHz and override any WiFi you have set up. 
Legally. The amateur radio operators have primary allocation in most of the 
band space, while ISM is secondary allocation. The amateur radio operators 
could, in theory, ask you to shut down your interfering WiFi operations. [1]

Related: telling someone that they are not permitted to operate Part 15 devices 
in their own residential space is a very grey area. It's probably not kosher to 
tell students that they are not permitted to operate their own WiFi in the 
dorms, but you *can* tell them they can't plug it in to your networks. In 
theory, they have just as much right to operate a Part 15 device in their own 
residence as you have to operate a Part 15 wifi network in the same space.

Whether that applies within the walls of a private institution that is not a 
residence, I have no idea. I suspect it does.

This is all very tricky. Please, consult with your institution's general 
counsel. IANAL, etc.

-- Jorj

[1] http://www.arrl.org/part-15-radio-frequency-devices

-- 
Jorj Bauer
Manager of Engineering, Research and Development
Information Systems and Computing, University of Pennsylvania
215.746.3850
XMPP: j...@upenn.edu




On Oct 28, 2014, at 7:59 AM, Osborne, Bruce W (Network Services) 
bosbo...@liberty.edu wrote:

 The reports if the FCC report that I read said that the  rogue devices were 
 not interfering with the hotel Wi-Fi network.
  
 I think they might have had a reason to deauth if the rogues were interfering 
 with the hotel network,
  
 Bruce Osborne
 Network Engineer – Wireless Team
 IT Network Services
  
 (434) 592-4229
  
 LIBERTY UNIVERSITY
 Training Champions for Christ since 1971
  
 From: Peter P Morrissey [mailto:ppmor...@syr.edu] 
 Sent: Monday, October 27, 2014 7:07 PM
 Subject: Re: It would seem FCC just declared WLAN quarantine features illegal
  
 So isn’t the MiFi device essentially jamming your network and interrupting 
 valid communications if it overlaps a nearby channel?
  
 Pete Morrissey
  
 From: The EDUCAUSE Wireless Issues Constituent Group Listserv 
 [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Thomas Carter
 Sent: Monday, October 27, 2014 5:18 PM
 To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
 Subject: Re: [WIRELESS-LAN] It would seem FCC just declared WLAN quarantine 
 features illegal
  
 IANAL, but it seems the FCC is trying to regulate the “communications.” 
 Sending a spoofed disassociate may not be jamming, but it is intentionally 
 interrupting valid communications. They may see making something unusable 
 through whatever means as equivalent to jamming.
  
 Thomas Carter
 Network and Operations Manager
 Austin College
 903-813-2564
 image001.gif
  
 From: The EDUCAUSE Wireless Issues Constituent Group Listserv 
 [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Pete Hoffswell
 Sent: Monday, October 27, 2014 4:05 PM
 To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
 Subject: Re: [WIRELESS-LAN] It would seem FCC just declared WLAN quarantine 
 features illegal
  
 My thought is that the FCC is simply trying to police the ISM band, as 
 outlined in FCC part 15 regulations
  
 http://www.ecfr.gov/cgi-bin/text-idx?SID=d5df6d61f643786c6651653f0942fd73node=pt47.1.15rgn=div5
  
 The 2.4GHz ISM band is free an open for everyone to use.  If you 
 intentionally disrupt transception, well, I think you might be breaking some 
 part of part 15.  I've not read part 15, nor could I even begin to comprehend 
 it.
  
 But it gets grey quickly, doesn't it?   If you have a rogue AP on your 
 campus, and you mitigate it by sending a spoofed disassociate packet, well, 
 are you jamming?
  
 I'm with Lee.  I think the FCC jumped into a deep pond with this one.  The 
 rules are out of date at best.  They need to clarify.
  
  
  
  
  
  
  
 
 -
 Pete Hoffswell - Network Manager
 pete.hoffsw...@davenport.edu 
 http://www.davenport.edu
 
  
 On Mon, Oct 27, 2014 at 4:38 PM, Lee H Badman lhbad...@syr.edu wrote:
 Not so sure I agree- I know that Marriott’s insane fees led to this, but the 
 FCC seems to be saying “you can’t touch people’s Wi-Fi, period” whether you 
 offer a free alternative or not seems irrelevant. But then again, it appears 
 that they issued a decision and were clueless about the fact that they 
 created a lot of confusion over features that are built in to equipment that 
 they certified for use in the US.
  
 Lee Badman
 Wireless/Network Architect
 ITS, Syracuse University
 315.443.3003
 (Blog: http://wirednot.wordpress.com)
  
 From: The EDUCAUSE Wireless Issues Constituent Group Listserv 
 [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Williams

Re: [WIRELESS-LAN] iphone 3.0 auto-join problems?

[Jorj Bauer]

We are receiving complaints from people who have upgraded to the  
iPhone 3.0
firmware. We operate 2 Wireless SSID's on our campus (guest and  
regular).
Our Guest ssid is a WPA-PSK that redirects to a portal and our  
Regular SSID
is an 802.1x authenticated ssid. Users using the Regular ssid had to  
install

a profile the first time they used it.

Prior to version 3.0 of the iPhone, users devices would remember the  
last
network they connected to and auto-connect to the Regular network.  
Now it

does not do that. Instead, it goes like:



It's a bug in iPhone OS 3.0. You should probably talk with Apple about  
access to the 3.1 beta for testing...


--
Jorj Bauer
Manager of Engineering, Research and Development
Information Systems and Computing, University of Pennsylvania
XMPP: j...@upenn.edu


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Re: [WIRELESS-LAN] 802.11n Draft 2.0

[Jorj Bauer]

 Had they received Wi-Fi certification?  I think that could be a
 differentiating factor.

I remeber that there was talk of 802.11g being certified *after* the 
final release, but not during draft. Some 802.11g draft hardware was 
specified as compliant after the final spec was approved, though. Ah, 
just found the old press release that seems to confirm:

  URL:http://www.wi-fi.org/news/pressrelease-022503-80211gcertification/en

So in that regard, we may do better with 802.11n draft 2 hardware. But 
it doesn't address what happens when draft 3 hardware arrives, or a 
vendor drops support for a product/goes out of business between the 
release of 802.11n draft xx and 802.11n's finalization.

No thanks. It's called Draft for a reason.

-- Jorj

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Jorj Bauer  |   [EMAIL PROTECTED]
Director of Networking  | 3330 Walnut St.
School of Engineering and Applied Science   |Levine Building, Room 160
University of Pennsylvania  | Philadelphia, PA 19104
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

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Windows Vista, 802.1x and draft-n cards

[Jorj Bauer]

All,

A number of Windows Vista laptops have started to arrive on our campus
with 802.11n draft 1.0 NICs. Over the past week we've found that the
combination of Windows Vista (mostly Ultimate), SecureW2's supplicant
(any version, but primarily 3.2), draft-n cards (primarily Intel), and
some types of 802.1x failures will put Vista into a state from which it
can't successfully perform any 802.1x authentications.

When the machine is in the failed state, reboots do not help. The best
fix is to remove Vista's saved settings for the wireless network,
manually set up a new network, and tell Vista to not automatically
associate. Then, once the network settings are reconfigured properly
(using SecureW2 rather than the built-in supplicant) the network can be
reconfigured to auto-associate without problems.

When the machines are working, they don't want to fail. But something
is occasionally perturbing them. A RADIUS server upgrade last week was
the catalyst for one set of failures.

Is anyone else seeing behavior like this? Our sample size is fairly
small at the moment, so we're looking for more data before the bulk of
our students return later this week.

Thanks in advance.

-- 
Jorj Bauer
IT Director
University of Pennsylvania
O: 215/898-0575
F: 215/898-1195


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