To re-install DU Meter (in order to upgrade to a newer version or for any other reason), just download it here, and install on top of your current version. All user options and association to dumeter. 20, released on January 13 . A LAN Monitor is an application that scans the entire network to ensure that all the network devices are working as expected. It generates alerts for suspicious activities on the network and provides a graphical or visual representation of data for your entire network. LAN monitoring software will monitor network performance and alert you to issues such as a printer going offline or a router that's not. This guide gives you a practical shortlist of the best network monitoring tools so you can compare options that fit your scale, budget, team skills, and roadmap.