Links: Building and testing wifi (2.4GHz) antenna

Seattle Wireless Antenna HowTo
http://www.seattlewireless.net/AntennaHowTo

Antenna Project
http://www.engr.sjsu.edu/rkwok/projects/Omni_and_Biquad_antenna_2009.pdf

Easy Homemade 2.4 Ghz Omni Antenna
http://wireless.gumph.org/articles/homemadeomni.html

How to Build an eco-friendly directional WiFi antenna
http://mods-n-hacks.wonderhowto.com/how-to/build-eco-friendly-directional-wifi-antenna-255620/

How-To: Build a WiFi biquad dish antenna
http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/

WLAN 802.11b/g Bi-quad antenna: building and testing
http://koti.mbnet.fi/zakifani/biquad/

Homebrew Wifi antenna test page
http://pe2er.nl/antennetesten/

$10 WIFI 16dBi Super Antenna Pictorial
http://www.instructables.com/id/10--WIFI-16dBi-Super-Antenna-Pictorial/?ALLSTEPS

Basic Antenna Theory
http://wirelessu.org/uploads/units/2008/08/12/39/5Anten_theor_basics.pdf


IEEE Standard Test Procedures for Antennas
http://www.rtce.com/docs/IEEE_Std_149-1979_Test_Procedures_for_Antennas.pdf

Antenna Measurement Theory
http://www.home.agilent.com/upload/cmc_upload/All/ORFR-Theory.pdf?&cc=AU&lc=eng

Antenna Measurements
http://wireless.ictp.it/handbook/C6.pdf

ZigBee does not have replay protection...

www.willhackforsushi.com/presentations/toorcon11-wright.pdf

Cisco router: default user name for ppp authentication

CHAP
By default, a cisco router uses its host name for username.
http://www.cisco.com/en/US/tech/tk713/tk507/technologies_tech_note09186a00800b4131.shtml#chapconfig

PAP
Have to specify user name for the authentication

Wireshark: key bindings for selecting packets

• Ctrl-Up :  Selecting previous packet
• Ctrl-Down :  Selecting next packet
• Ctrl-, :  Selecting previous packet in conversation 
• Ctrl-. :  Selecting next packet in conversation

Installing gcc on Mountain lion

Mountain lion does not include gcc, and the compiler comes with Xcode 4.3 is llvm, not gcc.

Installing HomeBrew
$ ruby -e "$(curl -fsSkL raw.github.com/mxcl/homebrew/go)"


Installing gcc with c++ support (c and c++ supports are enough for me)
$ brew install --enable-cxx --use-llvm https://raw.github.com/Homebrew/homebrew-dupes/master/gcc.rb

Note: When installing HomeBrew, the installer changes permission for /usr/local/.
==> /usr/bin/sudo /bin/chmod g+rwx /usr/local/. /usr/local/bin /usr/local/include /usr/local/lib

Reference:
https://github.com/mxcl/homebrew/wiki/FAQ#wiki-sudo
https://github.com/Homebrew/homebrew-dupes/blob/master/gcc.rb

Wireshark on Mac: Changing menu fonts

You can change a font for captured data from preferences, but it doesn't change the font for the application menu. To make the ugly unpleasant font acceptable, change "pre_gtkrc" file in "/Applications/Wireshark.app/Contents/Resources/themes/Clearlooks-Quicksilver-OSX/gtk-2.0/"

1. Change the font

#gtk-font-name="Lucida Grande 12"

gtk-font-name="Sans 10"

2. Change the menu sizes (buttons, etc.)

#gtk-icon-sizes = "gtk-menu=16,16:gtk-dialog=48,48:gtk-dnd=32,32:gtk-button=20,20:gtk-large-toolbar=24,24:gtk-small-toolbar=16,16:inkscape-decoration=12,12"

gtk-icon-sizes = "gtk-menu=14,14:gtk-dialog=24,24:gtk-dnd=32,32:gtk-button=14,14:gtk-large-toolbar=14,14:gtk-small-toolbar=10,10:inkscape-decoration=6,6"

3. Results

4. Notes

- Lucida Grande is the default system font for Mac, but it looks completely difference under X11.

- The environment is rMBP Mid 2012 running Mountain lion 10.8.2.

- The output is somewhat blurred since X11 cannot handle the retina display.

Wireshark: Enabling capturing from a non-root user

Under Ubuntu 12.04
Unlike youtube video, logout was necessary to get interfaces to show up on the wireshark!

$ sudo apt-get update
$ sudo apt-get install wireshark

$ sudo groupadd wireshark
$ sudo usermod -a -G wireshark USER_NAME
$ sudo chgrp wireshark /usr/bin/dumpcap
$ sudo chmod 750 /usr/bin/dumpcap
$ sudo setcap cap_net_raw,cap_net_admin=eip /usr/bin/dumpcap