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An excerpt from my ‘Layer 2 Security’ notes

Wed, 21 May 2008 18:34:23 +0000
Layer 2 Security – “Use either Dynamic ARP Inspection (DAI) or private VLANs to prevent frame sniffing”

 
Introduction to DAI:
- DAI prevents man-in-the middle attacks that misuse IP ARP (gratuitous ARPs)
- DAI checks at ingress only
- When DAI is enabled, all ports are untrusted by default, ports configured as being trusted bypass DAI checks
General Configuration (DHCP ...]

How to toggle between 12 and 24 hr time format in Unity

Mon, 09 Oct 2006 11:30:26 +0000
Unity Admin > Configuration > Settings
Schedule options: Use 24-hour time format for conversation and schedules
Default: 12-hour format

If I Were The Blog Catalog Administrator……

Fri, 18 Apr 2008 21:45:34 +0000
Since long, I have been watching the steep hike in the membership of senior citizens at B.C compared to the increase of the fresh, new and exuberant younger lot. The seniors are, of course there to look up to but I think I’ve got a bit too tired of them now! The “oldies” as I ...]

Another Link Added to Blogroll

Fri, 31 Aug 2007 04:23:13 +0000
I wanted to also send a shout out to Layer 1 Transport for adding me to his blogroll. Please show some love to them over @ http://layer1transport.blogspot.com/

An excerpt from my ‘Layer 2 Security’ notes

Wed, 21 May 2008 18:34:23 +0000
Layer 2 Security – “Use either Dynamic ARP Inspection (DAI) or private VLANs to prevent frame sniffing”

 
Introduction to DAI:
- DAI prevents man-in-the middle attacks that misuse IP ARP (gratuitous ARPs)
- DAI checks at ingress only
- When DAI is enabled, all ports are untrusted by default, ports configured as being trusted bypass DAI checks
General Configuration (DHCP ...]

What? Nothing to see?!?

Regarding the numbering, the folks at Cisco didn't want to start with the number '1'. So they decided to start with 1024, (2 ** 10), a common binary number. The lab was assigned the first number, 1024, and they placed a plaque with that number on the door (someone told me that the plaque has been kept and moved to one of the new test labs). Stuart was awarded the first real number, CCIE # 1025, because he created the test. I passed the hands-on test, designing and building the network in one day, then fixing the things he broke in just over half a day. I was awarded the next number, CCIE # 1026, in August, 1993, the first non-Cisco person to achieve the CCIE and the first to take the test. A bunch of Cisco employees soon followed and many of them are still working at Cisco. Something like five of the first ten CCIEs work in the same building at Cisco.

Writing is something that has to be enjoyed. And with cisco bcran, we have indeed enjoyed writing all that we know about it. We wish you also enjoyed yourself.


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