Just a short post for this week, as I've done recently.  This exam has completely consumed my time lately.  Because I had yesterday off,...

One of the big topics currently in Cisco's security track is Netflow.  According to Cisco, "NetFlow provides valuable information a...

In two previous blog posts, which can be found here  and here , I started going through the labs on the Free CCNA Workbook website and atte...

Have you ever wanted to create an ACL by country?  There's a number of different ways you can go about it.  Certain models of firewalls ...

According to it's man page, "tclsh is a shell-like application that reads TCL commands from its standard input or from a file and e...

Here's a quick post on a very useful command when working with ACLs.  I first heard about it while watching a CBT Nugget video, and I ca...

In a nutshell, reflexive ACLs allow packets to be evaluated based on upper layer session information. You use reflexive ACLs in order to per...

There are two main ways of shortening ACLs and improving their readability or performance. As you know, ACLs can grow to include hundreds o...

There is one more feature of the Cisco access servers that I do not see mentioned very often. Maybe it's been talked to death and I jus...

Racked up in my lab, I have more routers, switches, firewalls and access points than I care to count.  These devices are all in the basement...

This evening I was tasked with installing a PAK on an ASA 5512-X for a client.  Sales forwarded me the eDelivery Order Notification without ...

The different types of ACLs are first identified by the line number used. Standard IP ACLs use numbers in the range of 1 – 99 and 1300 – 199...