Excellent IT Security Education Resource!!!

For folks that are interested in learning about IT Security. Especially the ones going for Security+, CISSP, etc. Certifications will find the following resource to be an awesome reference. Here is the link: CCURE.ORG

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RSA Conference 2009 – Keynote Webcast

While I was researching Security stuff online, I came across RSA Conference 2009 Video Webcasts. Its really awesome stuff. Basically this a conference where all the Security Top Dogs from well-known companies like Cisco, Microsoft, Symantec, etc. come together to discuss the role of Security in ever-increasing complex IT Eco-System. Click on the link below to view the webcasts: RSA Conference 2009 – Keynote Webcast

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Cisco Learning Network

Cisco Learning Network (CLN) is a great place for gaining/sharing in depth knowledge of Cisco Technologies. Number of well known experts around the globe are available to provide assistance to folks from Novice to Expert level. Its basically a Cisco Virtual Learning Community or Human Network 🙂

If you are interested in becoming a CLN member click on the following link: CLN

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Cisco Security Advisories and Notices

The following link provides a report on vulnerabilities found in Cisco products/softwares & mitigation techniques: cisco.com/go/psirt

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How DNS Works?

DNS = Domain Name System or Service or Server

DNS resolves/maps a Name to an IP address

The diagram below describes the functionality of DNS. It also elaborates on what goes on behind the scenes once you type in a certain URL (Uniform Resource Locator) or a web address in your browser. The whole DNS process is based on the following 2 components:

  • DNS Query (Question)
  • DNS Reply (Answer)

(Click on the Picture Below to Enlarge)

how-dns-works-wm

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EtherChannel MAC Flap Issue on a Cisco Switch – Solution!

Have you ever come across a following error message?

*Mar  1 00:17:16.211: %SW_MATM-4-MACFLAP_NOTIF: Host 0015.2b57.8317 in vlan 1 is flapping between port Fa0/21 and port Fa0/23

The chances are you have, specially while configuring an EtherChannel. Here are some troubleshooting steps:

1) Make sure that the EtherChannel Port is UP via “show ip int brief” command or “show etherchannel summary

2) sh mac address-table command will show you whether or not those ports belong to Po or Port-Channel interface

3) Here is how to resolve this issue:

  • Make sure that the “Channel-Protocol” is the same on both ends. PAgP or LACP or on. If one end is PAgP & the other is set to on EtherChannel won’t form. Same goes with LACP.
  • Both sides of the EtherChannel have to have the same EtherChannel Negotiation Protocol i.e. PAgP or LACP. If you don’t want to use Negotiation Protocol then both ends have to be set to “on”.
  • The above-mentioned will resolve the issue.

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Black Hole

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Biometric System – Type I & II Errors

Biometric System is referred to as a phenomenon whereby human traits such as finger prints, palm scan, voice patterns, retinal/iris scan, etc. are utilized & analyzed for identification purposes. Biometric System (aka Biometrics) provides a solid identification platform since it compares identification/authentication against physical human traits stored in a Computer System (Database). Just like any other technology; Biometrics has its drawbacks as well. Two of the most common drawbacks I would like to point out here are the following:

  • Type I Errors: These types of errors occur when a person with valid identification/authentication credentials gets rejected. This error occurs when the Biometric System is calibrated to be highly accurate. Type I Errors are most common in Top Secret facilities/organizations since they can’t afford Type II Errors. Now this begs a question: What are Type II Errors? I am glad you asked. Read below 🙂
  • Type II Errors: These types of errors occur when a person with NO credentials get access. This is a very serious issue. That is why its very important that the Biometric System be calibrated with quite precision keeping a delicate balance in mind.

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Power of Brain Waves!!!

All of you have to do is think & computer will do the rest. Now that is Future of Technology. Science Fiction turned real: University of Wisconsin-Madison (Department of Biomedical Engineering) has built a Brain Wave recognition device that is capable of reading Brain Waves & translating them into an action. For more information click here: NITRO Lab

Check out the following video to see the above in action:

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How Do I Decrypt Cisco Type 7 Passwords?

There are a lot of choices available online. But my personal favorites are:

The 1st option is an online only service. The 2nd option, however, allows you to download a utility called “Get Pass” from Boson’s site that you can carry around on your laptop in order to decrypt Cisco type 7 passwords.

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