Systems and methods for detecting a denial of service attack are disclosed. These may include receiving a plurality of web log traces from one of a plurality of web servers; extracting a first set of features from the plurality of web log traces; applying a first machine learning technique to the first set of features; producing a first plurality of user classifications for communication to the web server; extracting a second set of features from the plurality of web log traces; applying a second machine learning technique to the second set of features; producing a second plurality of user classification for communication to the web server; communicating the first plurality of user classifications to the web server based at least on the plurality of web log traces; and communicating the second plurality of user classifications to the web server based at least on the plurality of web log traces.