jm + wireless   21

Wifi AP Placement [video]
'AP Placement - A Job For the Work Experience Kid? | Scott Stapleton | WLPC EU Budapest 2016'
ap  wifi  placement  layout  ops  wireless  home  presos 
8 weeks ago by jm
V2V and the challenge of cooperating technology
A great deal of effort and attention has gone into a mobile data technology that you may not be aware of. This is "Vehicle to Vehicle" (V2V) communication designed so that cars can send data to other cars. There is special spectrum allocated at 5.9ghz, and a protocol named DSRC, derived from wifi, exists for communications from car-to-car and also between cars and roadside transmitters in the infrastructure, known as V2I.

This effort has been going on for some time, but those involved have had trouble finding a compelling application which users would pay for. Unable to find one, advocates hope that various national governments will mandate V2V radios in cars in the coming years for safety reasons. In December 2016, the U.S. Dept. of Transportation proposed just such a mandate. [....] "Connected Autonomous Vehicles -- Pick 2."
cars  self-driving  autonomous-vehicles  v2v  wireless  connectivity  networking  security 
may 2017 by jm
Netgear PR2000 Trek Travel Router and Range Extender
802.11n, compact, can be used as a router, range extender, AP or bridge; very handy when travelling. Recommended by a FOAF
recommendations  toget  routers  netgear  wireless  wifi  travel 
may 2017 by jm
NetSpot
'FREE WiFi Site Survey Software for MAC OS X & Windows'.
Sadly reviews from pals are that it is 'shite' :(
osx  wifi  network  survey  netspot  networking  ops  dataviz  wireless 
april 2017 by jm
Contactless credit cards vulnerable to a range of scams
Johanson said it's possible to use an RFID "gate antenna" — two electronic readers spanning a doorway, similar to the anti-theft gates in retail stores — to scan the credit cards of people passing through. 
With enough high-powered gates installed at key doorways in a city or across the country, someone could collect comprehensive information on people's movements, buying habits and social patterns.
"These days you can buy a $500 antenna to mount in doorways that can read every card that goes through it," Johanson said.


Amazingly, these seem to be rife with holes -- they still use the legacy EMV protocol, do not require online verification with backend systems, and allow replay attacks. A Journal.ie article today claims that attackers are sniffing EMV data, then replaying it against card readers in shops in Dublin, which while it may not be true, the attack certainly seems viable...
rfid  security  scams  emv  wireless  contactless  credit-cards  replay-attacks 
december 2016 by jm
Nelson recommends Ubiquiti
'The key thing about Ubiquiti gear is the high quality radios and antennas. It just seems much more reliable than most consumer WiFi gear. Their airOS firmware is good too, it’s a bit complicated to set up but very capable and flexible. And in addition to normal 802.11n or 802.11ac they also have an optional proprietary TDMA protocol called airMax that’s designed for serving several long haul links from a single basestation. They’re mostly marketing to business customers but the equipment is sold retail and well documented for ordinary nerds to figure out.'
ubiquiti  wifi  wireless  802.11  via:nelson  ethernet  networking  prosumer  hardware  wan 
september 2015 by jm
Why wireless mesh networks won't save us from censorship
I'm not saying mesh networks don't work ever; the people in the wireless mesh community I've met are all great people doing fantastic work. What I am saying is that unplanned wireless mesh networks never work at scale. I think it's a great problem to think about, but in terms of actual allocation of time and resources I think there are other, more fruitful avenues of action to fight Internet censorship.


(via Kragen)
wireless  censorship  internet  networking  mesh  mesh-networks  organisation  scaling  wifi 
august 2013 by jm
IOS TCP wifi optimizer
Basically, tweaking a few suboptimal sysctls to optimize for 802.11b/n; requires a Jailbroken IOS device. I'm surprised that Apple defaulted segment size to 512 to be honest, and disabling delayed ACKs sounds like it might be useful (see also http://www.stuartcheshire.org/papers/NagleDelayedAck/).
TCP optimizer modifies a few settings inside iOS, including increasing the TCP receive buffer from 131072 to 292000, disabling TCP delayed ACK’s, allowing a maximum of 16 un-ACK’d packets instead of 8 and set the default packet size to 1460 instead of 512. These changes won’t only speed up your YouTube videos, they’ll also improve your internet connection’s performance overall, including Wi-Fi network connectivity.
tcp  performance  tuning  ios  apple  wifi  wireless  802.11n  sysctl  ip 
february 2013 by jm
UK Channel 4 News Demo – Contactless Payment Cards – viaForensics
'During an interview with the Channel 4 correspondent we were able to touch his wallet with an Android phone while he was distracted and capture his credit card details.' ... 'viaForensics found that there are many cards in circulation, including recently issued cards, which are giving up the full card number, expiry, surname and initials.' Barclays security fail hits the headlines (via Tony Finch)
via:fanf  channel-4  news  barclays-bank  uk  banking  nfc  wireless  android  via-forensics  contactless-cards 
may 2012 by jm
Black Hat: Insulin pumps can be hacked
"Everything has an embedded processor and computer in it," he said. "Every time you hide behind [security by] obscurity, it is going to fail."

Brad Smith, a researcher and Black Hat conference staffer who also is a registered nurse, said the medical field largely looks the other way when it comes to securing patient devices.

"I lecture at all the medical conferences," he said during the press conference. "They just hide it. Pay attention to what [Radcliffe] is saying. His life is in this pump." (via Risks Digest)
via:risks  insulin  pump  medicine  security  hacking  health  wireless 
september 2011 by jm
nifty Cydia iPhone signal-strength app
very nifty. pity my phone's not jailbroken, or I'd be trying this out
jailbreaking  cydia  iphone  signal-strength  3g  wireless  mapping 
august 2011 by jm
How to make WIFI work at tech conferences
a success story from JSConf. great tips, I'm sure some will be practical at smaller scales ;)
wifi  802.11b  802.11n  networking  802.11g  conferences  jsconf  wireless 
may 2011 by jm
TomatoUSB
'an alternative Linux-based firmware for powering Broadcom-based ethernet routers. It is a modification of the famous Tomato firmware, with additional built-in support for USB port, wireless-N mode support, support for several newer router models, and various enhancements. Tomato USB supports many Broadcom-based routers from Asus, Linksys, Buffalo, Netgear and other manufacturers.' Looks good -- I've been a Tomato fan for many years -- and jzawodny-approved
router  tomato  firmware  linux  routers  wireless  wifi  from delicious
march 2011 by jm
build a Yagi-Uda wifi booster from styrofoam and copper wire
nifty link from Heise; works for 802.11b and 11g. Unfortunately I think my own wifi issues are to do with dying AP hardware
wifi  802.11g  802.11b  wireless  yagi  antennas  diy  hacking  hardware  from delicious
june 2010 by jm
Tethering with your O2.ie iPhone
well done O2, you've made it insanely complicated and marginally useless
tethering  iphone  o2  ireland  wireless  3g  tariffs  telco  from delicious
february 2010 by jm
Mobile Internet access data retention (not!)
so, it seems the wireless ISPs don't have sufficient IPv4 space for their customers, and are filtering access to the internet via NAT; unfortunate side effect is that this breaks data retention as defined in the UK. wonder if the same applies here?
uk  data-retention  privacy  nat  isps  wireless  mobile  phones  networking  internet  filtering  from delicious
january 2010 by jm
Mint Studio Multi-Room Wireless Speaker
$130 speakers; outputs from computer via USB, transmits to wireless receiver, which also has an iPod dock and a line-in. exactly what I'm after! (thanks Jason for the tip)
via:jcosper  music  sound  mp3  home  wireless  speakers  from delicious
november 2009 by jm

related tags

3g  802.11  802.11b  802.11g  802.11n  android  antennas  ap  apple  autonomous-vehicles  banking  barclays-bank  cars  censorship  channel-4  community  conferences  connectivity  contactless  contactless-cards  credit-cards  cydia  data-retention  dataviz  dick-cheney  diy  emv  ethernet  filtering  firmware  hacking  hardware  health  home  hotels  insulin  internet  internetofshit  ios  iot  ip  iphone  ireland  isps  jailbreaking  jsconf  layout  linux  mapping  medicine  mesh  mesh-networks  mobile  mp3  music  nat  netgear  netspot  network  networking  news  nfc  o2  ops  orcas-island  organisation  osx  pacemakers  performance  phones  placement  presos  privacy  prosumer  pump  recommendations  replay-attacks  rfid  router  routers  scaling  scams  security  self-driving  signal-strength  sound  speakers  survey  sysctl  tariffs  tcp  telco  tethering  toget  tomato  tools  travel  tuning  ubiquiti  uk  v2v  via-forensics  via:fanf  via:jcosper  via:jzdziarski  via:nelson  via:risks  wa  wan  wifi  wireless  wlan  yagi 

Copy this bookmark:



description:


tags: