https://learningnetwork.cisco.com/thread/4654

Memory string preceding per-session IPSec keys in an IOS core dump:  00 00 00 00 63 C0 60 0C 63 C0 60 1C 07 D0 00 19 00 00 00 00 63 C0 60 0C 63 C0 60 1C 07 D0 00 19

Exactly 16 bytes after B8 begins the inbound encryption key, which is 24 bytes long. Immediately after the encryption key is the 16 byte authentication key.  Once these are sussed out, they can be used to decode a wireshark capture for troubleshooting purposes.  These keys are not the pre-shared key; they are the derived session key that changes periodically based on time or bytes sent.

Be the first to comment
   

http://hints.macworld.com/article.php?story=20060124152826491

Shows how to find the address of the DHCP server that issued your current lease on a Mac.

Similar to ‘show ip dhcp lease’ on Cisco, ‘ipconfig /all’ on Windows, or one of… well, I guess I’m not sure how to tell with dhcpcd  OR dhclient under Linux.  Something else to figure out at some point.

Be the first to comment
   

http://forums.macrumors.com/archive/index.php//t-300332.html

Printing in black and white.  Probably would have figured this one out if I had looked around long enough, but it just seems to be more intuitive (to me) on Windows and Linux.  One of the things I’ve found most interesting about this experience thus far is, for the claim I’ve often heard that Mac is just simpler and more intuitive… for me, it’s not.  There’s a fair chance that that experience could change as I become more accustomed to the way Apple has laid out the environment, but as a crossover… it’s not that way for me 🙂

Be the first to comment
   

I bought a Mac

Posted May 7, 2012 By Landis V

I recently purchased an older iMac to get some one-on-one time with the interface, just in case I ever have a need to know or the time and focus to work on a project I have an idea for that I would like to compile natively across several environments.  It’s a bit of an odd setup, probably especially for an iMac.  I have an existing el cheapo KVM switch that I use with a Windows and a Linux box, and I have a wireless keyboard designed for Windows that’s tied into that system.  Makes the keyboard mappings just a little more interesting.

So, from time to time, I’ll be posting things tagged with “useful Mac links” providing links or information I’ve found useful/interesting/annoying as I work with the Mac, from the perspective of someone who frequently gets under the hood on other platforms, prefers the shell to a GUI, and engineers IP networks as a day job.

A couple of interesting things I’ve run across thus far.

  • ‘ls –color’ is a non-entity on Snow Leopard’s bash shell.  I miss this one quite a bit.  It was a quick and easy differentiator of regular files, executable files, directories, and compressed files.
    EDIT: I discovered that ‘ls -G’ provides this functionality on Mac.
  • Windows Key + UpArrow (/DownArrow) appears to let you scroll in a Mac terminal with a Windows keyboard, and Alt + PgUp (/PgDown) appear to provide pagewise scroll, as opposed to Shift + PgUp/PgDown in Linux.
Be the first to comment
   

http://agoratelegraph.com/2012/04/29/the-immorality-of-the-social-contract/

Rosseau

Be the first to comment
   

http://www.cisco.com/en/US/docs/ios-xml/ios/media_monitoring/configuration/15-2mt/mm-pasv-mon.html

There are a ton of new features in the 15.2 train.   This is another one I’d like to look into further if I can find the time.  Though I do have to say, I’d rather Cisco focus on fixing some bugs for a while over more “neat to have” features, so I can quit spending time on workarounds and have some free time to work on “neat” stuff.

Be the first to comment
   

LXC Linux Containers To Be Better With Pangolin

Posted May 1, 2012 By Landis V

http://phoronix.com/forums/showthread.php?64453-LXC-Linux-Containers-To-Be-Better-With-Pangolin

Need to get back into this again as well, now that the network and systems are approaching a state of decent preparation for it.  Couple of good links off of this article.

Be the first to comment