While reading for my CCNA security exam I ran across an interesting link from cisco (You have to admit, if you dig deep enough some of cisco’s documentation is excellent) http://www.cisco.com/en/US/prod/collateral/iosswrel/ps6537/ps6586/ps6723/prod_white_paper0900aecd80633b0a.pdf It describes their Flexible Packet Matching (FPM) engine, available on certain routers and switches. To me this seems a fancy way of saying that … Continue reading Cisco Flexible Packet Matching
TIME_WAIT and “port reuse”
Lately during some support work, a customer raised an interesting case regarding what was referred to as "port reuse". This lead to quite a nice investigation on the effect of the MSL and TIME_WAIT characteristics of TCP. So first we should define these terms and what exactly they mean. Getting an exact definition can be … Continue reading TIME_WAIT and “port reuse”
David Vassallo's Blog 
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