I had been searching in the search engines and located that Apache could be set up via
mod_access directives within the
httpd.conf file to bar an internet site from the particular IP.
Can there be anything equivalent in Tomcat?
I don't know I realize do you know the corresponding configuration files.
Try the Remote Address Filter. http://tomcat.apache.org/tomcat-5.5-doc/config/valve.html
Begin to see the Request filters portion of this doc. Carrying this out via tomcat configuration is fairly static, you have to restart to edit configuration. If you want something dynamic, it's most likely better to implement a custom servlet filter.