I have begun to play around with Nipper. For those that don’t know what Nipper is, it is a Network Infrastructure Parser. It looks at running configurations of devices such as routers, firewalls, and switches and points out various vulnerabilities. It is a simple, yet very effective tool. The cool thing is it supports various platforms, not just Cisco and the results are generated into a text form that is bulleted for easy reading. For those who want to make their networks more secure, check it out. It’s worth it. 
After you install Nipper from sourceforge.net, you copy your running configuration into a .txt file. After doing so, open up your command line and insert the following:
nipper --ios-<device type> --input=<NameOfFile.txt> --output=<NameOfNewFile.html>
This will initialize the scan. You can run it multiple times to help you further harden (secure) your network. It’s that easy.
