The importance of “expires header” is growing along with the web page designs which are becoming richer in scripts, images, Flash, etc.

As a result of the growing complexity of web designs, a web page takes longer to load, which is why the site needs an expires header. It simply makes all components such as stylesheets, images and others cacheable or, in other words, prevents unnecessary HTTP requests after the first page view and hence load time is reduced.

Many people who run a business website overlook the importance of the domain name and its expiration date, and they only hear about it when the website is already down. Well, it is crucial to avoid domain name expiration because it could harm both your business and reputation significantly.

If you forget to renew your domain, you will stop receiving e-mails through your website; the website will simply be not there and replaced with ads. The best-case scenario is to lose the site but still be able to register it.

The service code 503 simply implies that the server is unable to handle a request due to overloading or maintenance of the server. It is important to note that although this condition is temporary and simply causes some delay, some servers may refuse the socket connection, which will result in a different 5xx error code.

Here’s what happens when the browser tries to communicate with the webserver:

Apparently the DDoS threat is growing to a point where it is becoming a major concern for data center managers as firewall products’ efficiency is failing.

The security testing organization NSS Labswhich recently discovered that 3 out of 6 firewall devices stop operating when tested for stability. DDoS has been a major threat for network operators for over ten years since their appearance, but recently these attacks have become more aggressive and have increased in frequency and impact.

The most dangeours type of downtime is the one you don't know about. It is discturbing how true that one line actually is. Should it occur, website/server downtime can and will cause problems and ripples throughout your organization. Before we get tarred and feathered for making such a bold statement, let us build our case.

The Problem

In this realworld situation, a business lost roughly 30% of their leads for July. Apart from their initial loss, they simply handed out a good portion of the market to their competitors, in high season. When the figures arrived, all hell broke loose. All major markets felt the downturn. In search for a logical explanation, hours of daytime were invested in finding the reason. After it was made clear that the traffic was stable, the management went on to search for answers somewhere down the line. The marketing team had to pull out detailed reports for their activities in the last three months. Seasonal sales people got numerous tests calls. A full-scale internal audit took place. This caused a ripple effect and the normal workflow was seriously disrupted.