webapp security in tomcat

Hi, Can you please tell me if I can configure tomcat to let a range of IP address to access 1 web app hosted by tomcat, while another set of IP address to access another web app hosted by the same tomcat? Thank you.

How can I limit the number of thread that tomcat spawn for my servlet

Hi, My understanding is tomcat will spawn a thread for each request to my servlet. How can I limit the number of thread that tomcat spawn for my servlet simultaneously? And let say if I limit the simulateous thread for my servlet to 10, what happens to the 11th request? Will it get dropped? Or W