For now, let's see how we can detect whether Tomcat is installed on a server and what the commonly known detection techniques that can be used for further reconnaissance are.
Detecting Tomcat installations
Detection via the HTTP response header – X-Powered-By
A very common way of detecting an Apache Tomcat installation is by looking at the X-Powered-By HTTP header in the server response:
A typical installation will give the Apache Tomcat version in the HTTP response header.
Detection via the HTTP response header – WWW-Authenticate
An easy method of...