This monitor allows to monitor open tcp ports at any server which is available on the internet and is externally accessible. Thereby a port
scan is carried out to check if/which public accessible tcp ports a server offers. The result is compared with a list of allowed ports and
Unmeant open tcp ports are generally potential points of attack for penetration tests respectively DDoS attacks.
It is therefore advisable to monitor the open ports continuously in order to be informed immediately if there are deviations from the
intended open ports.
The aim of this monitor is to detect unauthorized / unwanted open ports, not to carry out the availability check of authorized
open ports. For these purposes the offered monitors
for the specific use cases (web, mal, database) should be used.