Things look quiet here. But I've been doing a lot of blogging at
dan.langille.org because I prefer WordPress now.
Not all my posts there are FreeBSD related.
I am in the midst of migrating The FreeBSD Diary over to WordPress
(and you can read about that here).
Once the migration is completed, I'll move the FreeBSD posts into the
new FreeBSD Diary website.
PortSentry is a program which watches connections on your ports
and sends you warning messages if someone scans them.. It's good for most port scans
but not all.
This is from /usr/ports/security/portsentry/pkg/DESCR:
PortSentry is part of the Abacus Project suite of security tools.
It is a program designed to detect and respond to port scans against
a target host in real-time. There are other port scan detectors that
perform similar detection of scans, but PortSentry has some unique
features that may make it worth looking into
Disclosure: I'm the port maintainer for PortSentry.