The musings of an IT Consultant:

August, 2009


August 31, 2009  4:28 PM

DHCP security on Cisco switches

Raj Perumal Raj Perumal Profile: Raj Perumal

Hi folks! So I'm sure you've all run into the issue of having a rogue DHCP server on your network. This can happen just as easily by accident or as a determined attack.  How do you avoid this? Well on Cisco switches, you can use something called DHCP Snooping! DHCP Snooping allows the switch to...

August 31, 2009  4:02 PM

Port Security on Cisco Switches

Raj Perumal Raj Perumal Profile: Raj Perumal

So in a previous blog I mentioned something called port security. What is port security you might ask? Well in Cisco land port security is the ability to...


August 31, 2009  3:32 PM

Using Firefox when it’s being blocked

Raj Perumal Raj Perumal Profile: Raj Perumal

Hi folks, as you know I've been recently testing out the new version of Firefox and it's been great! But what do you do when people decided to block which version of a browser you are using in an environment and force you to use Internet Explorer? You look for a Firefox plugin of course! :)...


August 31, 2009  2:43 PM

VTP – should you use it?

Raj Perumal Raj Perumal Profile: Raj Perumal

Hi folks! So welcome to the wonderful world of networking! You buy that fancy brand new Cisco switch and you think to yourself, "I have this cool feature called VTP (Vlan Trunking Protocol) and I want to use it to automatically deploy vlans across all of my switches! This will save me tons of...


August 31, 2009  2:28 PM

Preparing for the ISCW

Raj Perumal Raj Perumal Profile: Raj Perumal

Hello again folks! So this time I'm getting ready to write my 3rd exam in the CCNP series of exams. The next exam is called the ISCW ( Implementing Secure Converged Wide Area Networks).  This is exam # 642-825. The ISCW exam material seems to be smaller to me. I've also heard it is easier than...


August 25, 2009  7:08 PM

Passed the BCMSN!

Raj Perumal Raj Perumal Profile: Raj Perumal

Hi folks! As you can probably tell from the title of this post, I passed the BCMSN! Yay! It was a hard exam but not as hard as the BSCI in my opinion. Before I had written either exam, I had heard that the BSCI was 10 times harder than the BCMSN. I don't think that's quite correct. It was probably...


August 25, 2009  12:18 PM

CCNP – BCMSN Next!

Raj Perumal Raj Perumal Profile: Raj Perumal

Hi folks, so I'm almost done preparing for the BCMSN exam which is part of the CCNP certification. The exam is called Building Cisco Multilayer Switched Networks. I've already written the routing one and this is the next one on my list. These Cisco exams are pretty tough and sure take a lot out...


August 18, 2009  6:52 PM

Firefox 3.5

Raj Perumal Raj Perumal Profile: Raj Perumal

Hi folks, so as of late I decided to upgrade my browser. I've been reading about the hype and I decided it was time to try out the new Firefox 3.5. So what do I have to say about Firefox 3.5? WOW! It's stable, it's fast, and it's just plain awesome. :) I find I don't have as many issues with the...


August 12, 2009  6:46 PM

TrueCrypt is your friend

Raj Perumal Raj Perumal Profile: Raj Perumal

Hello again folks, I hope everyone's week has been going great! So I wanted to talk about a program that has been around for some time. That program is TrueCrypt, an encryption program that you can use to create encrypted volumes on your hard drive for file storage or to even encrypt the entire...


August 8, 2009  4:58 PM

Online services under DDoS Attack!

Raj Perumal Raj Perumal Profile: Raj Perumal

So unless you have been asleep all this time, you would have seen the latest in the news from the online community. It seems there has been a DDoS (Distributed Denial of Service Attack) launched against Twitter, Facebook, and Google's Blogger. This attack has been hitting so hard that the online...


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