easyNag legacy is a legacy app that allows users to interact with their Nagios, Icinga, OP5 Monitor, OpsView, Thruk/Naemon, Centreon, or checkmk monitoring system. Setting up the app is simple, requiring users to add a new instance with the URL of their monitoring system, as well as their username and password. No modifications need to be made on the server-side.

The app offers a range of features, including support for Nagios 3.x/4.x, Nagios XI API, checkmk Multisite, Icinga API, Icinga Web 2, Icinga Classic, OP5 Monitor API, OpsView API, Centreon API, Thruk, and Naemon. Users can save multiple instances and connect to multiple instances at once. The app also supports graphs, customizable swipe actions, and a Master Control for checkmk.

Other features include a Problems Overview, Hosts Overview, Service-Detail Overview, Host-Detail Overview (with services of host), regex keyword filter to hide specific services or hosts, acknowledgement of service or host problems, force recheck of service or host, and disabling/enabling of notifications for a service or host.

Users can also schedule downtime for a service or host, schedule downtime for all services of a host, view a Downtime Overview, remove scheduled downtime, and perform instant actions such as acknowledging a problem, forcing a recheck, or disabling notifications. The app supports multiple date formats and also offers Dark Mode support.

Please note that this is a legacy app and users are encouraged to download the new easyNag App from the App Store for the latest features and updates.

For more information and assistance, users can refer to the FAQs on the developer's website.