Router Syslog is a very simple and free tool. It lets you monitor the activity produced in your router, giving all the information stored there.
In Router Syslog you must indicate the corresponding IP of the router, and you will see all the information related to what is stored in the router`s log file. That information can be exported to a text format file with the name syslog_date.txt.
Thus you`ll have the information for each day on the behaviour of different incidents, activities and events that happen inside the router.