The FLAV internal web pages use a Cookie to remember that you are logged on. Every time it fails to find the Cookie then it asks you to logon. Once it has a valid Cookie then it knows you are logged on and will route you to the pages that you asked for.
A Cookie is a small slice of information that is held on your computer and is passed back to the web page when it needs it. The FLAV internal site creates a Cookie when you successfully log on. The Cookie is automatically destroyed when you close the browser window.
This depends on your browser. If you are using Microsoft's Internet Explorer then this paragraph below should help. If you are using any other type of browser then I suggest you refer to your browser's help system and search for Cookie.
Cookies are files that are stored on your computer by some websites. They're usually used to keep track of information about you (for example, your user name, password, or the contents of your shopping cart). Internet Explorer privacy settings let you specify which cookies you want to allow to be stored on your computer.
To customize cookie settings for an individual website
A worked example for Internet Explorer can be found here.