For a very simple HTTP server, execute this in the directory you would like to serve.  The default port is 8000.  So http://<ip address>:8000/   will get you to there.

python -m SimpleHTTPServer

There is a really nice "hidden" setting in both Lion and Mountain Lion which allows for changing the look of the stack list menu.   Apple really should make this the default:

defaults write com.apple.dock use-new-list-stack -bool YES; killall Dock

Show full path in Finder

defaults write com.apple.finder _FXShowPosixPathInTitle -bool YES; killall Finder

Clear DNS cache in Lion and Mountain Lion

sudo killall -HUP mDNSResponder

Keeps the display from sleeping.    Maintains this state until caffeinate is terminated.    OS X Mountain Lion only.

caffeinate -d 
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OS X maintains a download history of everything downloaded on the machine.   From what I have seen this isn't cleaned with off the shelf privacy cleaners.   Could be a valuable tool to those doing OS X forensics.

sqlite3 ~/Library/Preferences/com.apple.LaunchServices.QuarantineEventsV* 'select LSQuarantineDataURLString from LSQuarantineEvent' | sort

Now if you would like to delete this information:

sqlite3 ~/Library/Preferences/com.apple.LaunchServices.QuarantineEventsV* 'delete from LSQuarantineEvent'
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You might noticed that OS X occasionally shows duplicate application entries when doing a file "open with" in finder.   This can be easily fixed by running the command:

/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/LaunchServices.framework/Versions/A/Support/lsregister -kill -r -domain local -domain user;killall Finder;echo "Open With has been rebuilt, Finder will relaunch"
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I have found the following nettop commands useful in my troubleshooting of IPv6 connections

nettop -n -m route

nettop -n
It is possible to get quite a speed boost out of Mail.app by stripping all the bloat out of its Envelope index.  Since mail.app uses sqlite we can use the vacuum command.   The below command works in OS X Lion:

sqlite3 ~/Library/Mail/V2/MailData/Envelope\ Index vacuum;

To monitor file writes and reads to and from the disk.   The activity will be recorded in the output.txt file.  Use control-C to quit.

sudo fs_usage -e -w > ~/output.txt


To Create a DMG from a folder:

hdiutil create name.dmg -srcfolder ~/Desktop/FolderName


To restart the OS X dock:

Restart Dock or killall Dock


You may notice if you use network shares that OS X leaves .DSShare files on the network shares. While these aren’t visable to OS X users, if you have other users accessing the same share they will see these files in every directory. Since these files simply save the appearance of the folder in OS X, disabling it shouldn’t have any adverse effect:

defaults write com.apple.desktopservices DSDontWriteNetworkStores true


In order to eject a stuck CD/DVD you can use the below command. Sometimes the CD remains in the tray but a desktop icon is no longer visable. This command line eject command will eject the CD.

  drutil tray eject

  drutil tray open

To reset a login password, start OS X with command+S which will start the system in single user mode. Then type:

fsck -fy mount -uw / launchctl load \
/System/Library/LaunchDaemons/com.apple.DirectoryServices.plist \
dscl . -passwd /Users/UserName newpassword


To convert a DMG file to an ISO File:

hdiutil convert /path/to/filename.dmg -format UDTO -o /path/to/savefile.iso


List open TCP/UDP ports:

netstat -lnp TCP
netstat -lnp UDP
lsof -i -P


List contents of DMG/PKG files:

lsbom .pkg/Contents/Archive.com> |more

I'll be presenting an Introduction to IPv6 and its implications on network security and investigations on Monday September 17th at 3:30PM at the High Tech Crime Investigation Association Conference taking place at the Hershey Lodge in Hershey, PA.

http://www.htciaconference.org/

My presentation can be found here:

I am working on a python script for IPv6 malicious packet handling.   The script requires Scapy which can be downloaded from http://www.secdev.org/projects/scapy/

Be sure you are running at least Scapy (2.2.0-dev)   The script was tested on Backtrack 5 R2

Currently the script performs the following tests:
1. Send HbH Header Flood
Test handling of a large number of HbH headers directed at a L3 device.   Could DOS a router if there isn't proper policing of packets to the CPU.

2. Send RH0 Packets
Test for the filtering and/or handling of RH0 packets.   RH0 packets have been deprecated and shouldn't be accepted.

3. Send Packets with two RH0 Headers
Tests the corner case of two RH0 headers; one after the other.

4. RA deamon killer
Some RA daemons will crash if you send RAs towards them with a spoofed source of themselves with a lifetime of zero

5. RA Flood
Send a flood of RAs with random prefixs.   Will DOS Windows and possible other devices.

6. Hide Layer 4 Info for ACL Bypass
Test the handling of ACL and firewall rules with the layer 4 information "hidden" in the second fragment.  Some firewalls will pass this since it doesn't find the layer 4 information in the first fragment.

You can download the current version of the script from github:  ipv6-test.py