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January contest

By stretch | Monday, January 5, 2009 at 12:00 a.m. UTC

What better way to kick off the new year than with a new packet analysis contest? Following the manner of the last two contests, a packet capture is provided at the end of this post, and you'll have to extract some arbitrary bit of information from it. The challenge this time: find the IOS version running on

The usual guidelines apply:

  • Your answer must include the exact IOS version (for example, "12.3(8)T2," not just "12.3"). The feature set ("IP Base," "Advanced Enterprise," etc.) is not required in your answer.
  • The answer is reachable with the information provided in the capture using only freely available open source tools.
  • Entries must include a brief explanation of how you arrived at your answer; no guessing.
  • One entry per person.
  • Only entries received by email (including those submitted via the contact form) will be accepted. Please do not post your answer in the comments.
  • If you want a book please be ready to provide your mailing address if you are randomly chosen (winners will be notified; your entry doesn't need to include your mailing address).

E-mail your entry to stretch at packetlife dot net (or use the contact form), with the word "contest" in the subject. Entries are due by 23:59 UTC on Thursday, 8 January. The answer and contest winners will be announced in a post the following day. Feel free to leave comments on this post until then, but please refrain from discussing answers or giving hints (comments are moderated).

Book cover

Since the prize for November's contest was Routing TCP/IP volume 1, it's only fitting that the prize this time is Routing TCP/IP volume 2! I've reviewed both volumes and heavily recommend both.

Copies of these books have been graciously donated by Cisco Press. Three correct entries will be chosen at random and each will win a copy. (Unfortunately, winners of the last contest aren't eligible to win again, but participation in the challenge is of course still welcome.)

Good luck!

Posted in Announcements


Marcio Minicz
January 5, 2009 at 1:47 a.m. UTC

Good contest. I send my answer.

Giovanni Navarrette
January 5, 2009 at 5:15 a.m. UTC

That was a fun one..., answer sent.

January 5, 2009 at 6:03 a.m. UTC

as usual I am lost :)

ps. using 'p0f' or 'strings' didn't help

January 5, 2009 at 8:24 a.m. UTC

i agree...excellent challenge!

answer submitted.

January 5, 2009 at 10:09 a.m. UTC

Nice one!

January 5, 2009 at 10:51 a.m. UTC

Nice challenge, I learned a thing or 2. Keep up the good work!!

January 5, 2009 at 11:58 a.m. UTC

Happy new year and thanks for that funny contest. I send you an email with my answer ;)

January 5, 2009 at 2:04 p.m. UTC

Another nice contest.
this one i was able to extract the info needed from the capture
( last one was a little though )

Nick Maio
January 5, 2009 at 4:35 p.m. UTC

Cool contest....submitted my answer.

January 5, 2009 at 4:53 p.m. UTC

I love these contests.

John Burns
January 5, 2009 at 5:12 p.m. UTC

Great contest answer sent!!

January 6, 2009 at 3:15 a.m. UTC

That's a great contest, answer sent!

January 6, 2009 at 10:49 a.m. UTC

Fun :)

Danail Petrov
January 6, 2009 at 3:18 p.m. UTC

That was good ;-) Answer sent!!!

January 6, 2009 at 7:22 p.m. UTC

cool contest, keep up the excellent work

Since I've introduces my colleagues to the cheat sheets they become daily visitors !

January 7, 2009 at 6:27 a.m. UTC

Very nice contest! I surely learned something here which is always a good thing. :)

Paul Stewart
January 9, 2009 at 1:49 a.m. UTC

Great contest. I love these things.

January 9, 2009 at 4:29 a.m. UTC

Nice contest.. Let's try something a bit tougher for next time ;-)

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