Dhound.io - is an excellent tool that allows you to monitor unauthorized access to the server, input and output traffic, and also has a special plug-in for WordPress. Detailed documentation and reliable customer service help to configure everything correctly and sleep peacefully with the certainty that the production part on the server is supervised. Comfortable and beautiful UI allows you to see the whole picture, it is easy to understand what kind of threats we face. Smart alerting system allows you to keep abreast of and exclude the possibility of missing something important.
Nothing really comes to mind. Had an extremely positive experience with the tool