When browsing web files and directory, most bots, without consideration to .htaccess restrictions, have the capability to crawl and sniff files and folders located under your web root folder, even if these files and folders were not visually displayed from your web pages. Take for an example, you displayed a file under http://domain.com/folder1/folder2/folder3/page.html Most bots [...]

Blogroll in WordPress displays a list of blogger’s favorite blogs in the sidebar of their blog. Blogroll provides links to external blogs in easily managed way. Some webmasters also use Blogroll to display backlinks to other external sites for link exchange or link buying. In reality, links added by WordPress blogroll is actually useless textlinks [...]

We will use an example based approach to examine the various iptables commands. In this first example, we will create a very simple set of rules to set up a Stateful Packet Inspection (SPI) firewall that will allow all outgoing connections but block all unwanted incoming connections:

Working with iptables from the command line requires root privileges, so you will need to become root for most things we will be doing. Iptables should be installed by default on all CentOS 3.x, 4.x and 5.x installations. You can check to see if iptables is installed on your system by: $ rpm -q iptables [...]

Replication enables data from one MySQL database server (called the master) to be replicated to one or more MySQL database servers (slaves). Replication is asynchronous – your replication slaves do not need to be connected permanently to receive updates from the master, which means that updates can occur over long-distance connections and even temporary solutions [...]

It includes an attractive web interface for users, admins, and clients to access and update their DNS zone data as well as a rich API for provisioning systems to interact with. All zone data is stored in MySQL and is extracted by export scripts to the DNS server of choice (tinydns, BIND, PowerDNS). Updates are [...]

Subversion depends on a number of third party tools and libraries.Some of them are only required to run a Subversion server; others are necessary just for a Subversion client. This section explains what other tools and libraries will be required so that Subversion can be built with the set of features you want

OK, let’s see a show of hands: How many of you are reading this book because you want a #1 rank in Google? Yeah, we thought so. As SEO consultants, we know how good it feels when your website makes it to the top of the heap. Listen, we sincerely hope you get your #1 [...]

A Microsoft ActiveX control is essentially a simple OLE object that supports the IUnknown interface. This section offers solutions for making a control work well in the Internet environment, with the ultimate goal of delivering optimal quality of service to users. For example, because browser speed is one of the primary factors in users’ perception of quality, this section aims to provide solutions that allow an HTML document or page to become visible as soon as possible and interactive very shortly thereafter, while allowing controls to retrieve large data blocks in the background

ln -s [TARGET DIRECTORY OR FILE] ./[SHORTCUT] For example: ln -s /usr/local/apache/logs ./logs This points a symbolic link “./logs” to “/usr/local/apache/logs”

The Multi Router Traffic Grapher (MRTG) is a tool to monitor the traffic load on network-links. MRTG generates HTML pages containing PNG images which provide a LIVE visual representation of this traffic. MRTG is basically used for generating graphs to a device, network host, IP-based appliances for monitoring usage, live data and statistics usage. This [...]