TCP port status count plugin for munin
tcpportstat_ => /usr/share/munin/plugins/
chmod +x /usr/share/munin/plugins/tcpportstat_
ln -s /usr/share/munin/plugins/tcpportstat_ /etc/munin/plugins/tcpportstat_%PORT%
OR
ln -s /usr/share/munin/plugins/tcpportstat_ /etc/munin/plugins/tcpportstat_all
ex.)
ln -s /usr/share/munin/plugins/tcpportstat_ /etc/munin/plugins/tcpportstat_80
Above for Port 80(HTTP)