Network technologies and trends:

May, 2013

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May 15, 2013  5:28 AM

What is AsyncOS?

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

When it comes to Cisco's networking products, the default operating system comes into our mind is Cisco IOS, a very popular OS among the networking professionals, however, when it comes to Cisco Email Security Appliance (ESA),better known as Cisco IronPort appliances the OS changes. The Cisco...

May 14, 2013  12:54 PM

A review for “Email Security with Cisco IronPort”

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

When it comes to Email Security, no other product is as powerful as Cisco IronPort. Therefore, we opted Cisco IronPort C370 as our email security gateway. Since its inception into our network, I am searching for a great reference and study guide for the Cisco IronPort products.


May 9, 2013  11:23 PM

Being in Gartner Magic quadrant is sufficient to succeed?

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

Currently, we are testing some of the network and application monitoring solutions, so that we can go with a product, which serves our needs. We approached many vendors and got a good response from them, and some even offered to do a proof of concept. Which we opted  happily, and in fact it helped...


May 9, 2013  10:47 PM

What is the error “Signature Auto Update Fails with Error HTTP connection failed [1, 110] “ in Cisco IPS sensors?

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

  Recently, I configured our Cisco IPS Sensors modules SSM-40 installed in the Cisco ASA 5540 and Cisco IPS 4270 sensor to auto update the signature behind our Blue Coat Proxy SG, upon configuration, I discovered that the auto updates failed. When I tried to know status by using Cisco IOS...


May 6, 2013  4:59 AM

How to preserve encapsulation across SPAN?

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

While any one of you are trying to analyze a SPAN or RSPAN traffic you may notice that certain layer 2 frames are missing. Usually SPAN/RSPAN ignores layer 2 traffic like CDP, spanning-tree BPUDs, VTP, DTP and PagP frames.  However, these traffic types can be forwarded along with the normal SPAN...


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