Better than netstat -a

[0iD]

Just Found this lil app. CurrPorts and it's a doozy! and free

CurrPorts displays the list of all currently opened TCP/IP and UDP ports on your local computer. For each port in the list, information about the process that opened the port is also displayed, including the process name, full path of the process, version information of the process (product name, file description, and so on), the time that the process was created, and the user that created it.
In addition, CurrPorts allows you to close unwanted TCP connections, kill the process that opened the ports, and save the TCP/UDP ports information to HTML file , XML file, or to tab-delimited text file.
CurrPorts also automatically mark with pink color suspicious TCP/UDP ports owned by unidentified applications (Applications without version information and icons)

Well handy if u want to know what's accessing what port from where.

[Paul Adams]

I like that tool, ty!

Funnily enough, I'd just come across "TCPView" which is a similar replacement GUI for netstat, but has nothing like the detail or control this thing does

Very useful for draining web servers from clusters and being certain there are no users still connected before rebooting, and for seeing how many BitTorrent connections you have