PRTG 17.3.34 comes with a completely rewritten web interface. If you have customized the PRTG web interface using one of the dedicated files, all your customizations will be lost with the version you are going to install. Please redo your changes after the update as described in this Knowledge Base article to keep customizations: Customizing and Re-Branding the PRTG Web Interface
Please make sure that you have installed the .NET 4.5 framework or later on your PRTG server and on all probe systems! Sensors that require the .NET framework will need .NET version 4.5, 4.6, or 4.7 on all computers running a probe after you have installed this update. See this Knowledge Base article for details.
What's New In 17.4.34/17.4.35
[WebGUI] Completely revised and updated look&feel of the PRTG web interface! The new, modern PRTG web interface comes with a cleaner look so you will find what you need more easily. [Sensors] You are now able to monitor NetApp SnapMirror relationships with the new NetApp SnapMirror sensor. [Sensors] The SNMP Library sensor will now use imported MIB files to automatically create SNMP Custom Advanced and SNMP Custom Table sensors with up to 10 channels each instead of many single value sensors. This makes adding custom SNMP sensor much easier! [Security] General security enhancements for PRTG and the configuration file
Some sensor types have been removed from PRTG! We removed some sensor types from PRTG as announced previously. Sensors of this type stop monitoring and show a down status as of the PRTG version you are about to install. See more below.
The Mobile WebGUI has been removed from PRTG! We have completely removed the Mobile WebGUI from PRTG as announced previously. You will not be able to login to this interface anymore as of the PRTG version you are about to install. See more below.
The SSL Security Check sensor changed the security rating of TLS 1.0! We changed the behavior of the SSL Security Check sensor. It will show a warning status (weak security) for accepted TLS 1.0 connections as of the version you are about to install.