2007.08.28
The Treacherous Power of Extended Regular Expressions
I wanted to filter out lines containing the word "line" or a double quote
from a 1GB file.
This can be easily specified as an extended regular expression,
but it turns out that I got more than I bargained for.
Continue reading "The Treacherous Power of Extended Regular Expressions"Last modified: Tuesday, August 28, 2007 10:37 am
2007.08.02
Location-Based Dictionary Attacks
I get daily security reports from the hosts I manage.
Typically these contain invalid user attempts for users like
guest, www, and root.
(Although FreeBSD doesn't allow remote logins for root,
I was surprised to find out that many Linux distributions allow them.)
Continue reading "Location-Based Dictionary Attacks"Last modified: Thursday, August 2, 2007 10:01 am