Alok, There are several types of tools for running audits. Most depend on what you want done and the type of network you are working on.
The first thing I recommend is getting several books - there's a bunch of reading to get you "up to speed" (I don't know your background - I am basing this on your comments that you are new to security). If you ask this list for a reading list you will get a different answer from everyone here. There will be some books and articles that everyone will agree on as well. My personal suggestions would be: Hacking Exposed Understanding TCP/IP (on the 3com web site) TCP/IP Illustrated Maximum Security for starters Good Luck, Rob
