IP on DNS Blacklist Sensor
The sensor checks if the given IP is a valid IP address. If not, it is assumed that a hostname is entered and the IP is resolved from your DNS. Next the IP is “reversed”, so 80.83.122.12 becomes 12.122.83.80. The reversed IP is sub fixed to the blacklist server domain 12.122.83.80.bl.spamcop.net. This new address is resolved against your DNS server. If this results into a dnserror, the original IP is not listed in the blacklist server.
This sensor requires the Microsoft .NET Framework to be installed on the computer running the PRTG probe: Either the local system (on every node, if in a cluster), or on the system running the remote probe. If the framework is missing, you cannot create a PTF sensor.
Required .NET version: 2.0 or higher.
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