in reply to Which packet sniffing module should I choose?
Outside of CPAN there are also interesting things to be found, like
CoralReef,
which is a comprehensive software suite to collect and analyze data from passive Internet traffic monitors. The package also includes programming APIs for C and perl, and applications for capture, analysis, and web report generation.
disclaimer: I work for the organization that develops CoralReef.
In Section
Seekers of Perl Wisdom