Archive for June, 2010

Should I use Supernets and Secondary Address in my network ?

Friday, June 25th, 2010 at 3:23 pm  
Comments (1)

Many network administrators are using secondary addressing and supernets as a way to “simplify” their IP networks.  While there was value in the early days of networking for this practice, many IT managers learned a painful lesson.  To better understand why this should not be considered a best practice for IP networks, it is important to look at the underlying technology of most networks to understand the risks.  That underlying technology is of course Ethenet.… Read the rest

Speeding up Slow Internet Application Performance

Wednesday, June 16th, 2010 at 2:16 pm  
Leave your comment

A friend of mine runs a company that runs training labs for IT users all over the world. He had a problem with his latest application, which was a lab simulator for a complex server, storage, and virtualization environment. The problem was, everybody outside the United States was experiencing extremely slow performance.

Application performance over the Internet is a tricky thing. It depends on a number of different aspects of the TCP/IP stack working correctly. … Read the rest

VoIP Business Telephone System Upgrade Planning for Mid-Size Organizations

Wednesday, June 9th, 2010 at 6:15 pm  
Leave your comment

So your organization is finally planning on upgrading the old PBX, you’ve got a big project on your hands, and you are looking for the first things that you need to do to plan this beast out. Well have no fear because I have been on the planning, design, deployment and support side of the voice over IP business for 10 years and will give you a big picture overview of what the next 3 … Read the rest

Utilizing Object Groups on the ASA

Friday, June 4th, 2010 at 9:24 am  
Leave your comment

Object groups on the ASA allow you to group similar types of components within a single heading.  You can use this heading for access-lists, which in turn can be used for access control, NAT,

(function(d, s, id) {
var js, fjs = d.getElementsByTagName(s)[0];
if (d.getElementById(id)) {return;}
js = d.createElement(s); js.id = id;
js.src = “//connect.facebook.net/en_US/all.js#xfbml=1″;
fjs.parentNode.insertBefore(js, fjs);
}(document, “script”, “facebook-jssdk”));

… Read the rest