Before any of the clients can start obtaining an IP address from the DHCP server, you need to deal with the security requirements for the DHCP server. They include adding a firewall rule with iptables and disabling any SELinux options that prevent the DHCP service from...

One of the basics elements found on all networks is a Dynamic Host Configuration Protocol (DHCP) server, making it an important part of any network. DHCP makes network administration easy because you can make changes to a single point (the DHCP server) on your network and...

The most basic test after the DNS server has been set up properly is to ping the hostname of the nameserver and the domain itself. If both return a reply, your nameserver is querying properly.

A forwarding-only server does not actually handle any queries, but instead just forwards them to the correct location. This might be something you see if you work for an ISP that handles thousands of requests at a time. Forwarding-only servers are actually the easiest to set...

A slave DNS server is similar to a master DNS server. It can help with load balancing and provide redundancy should the master DNS server fail. Because it serves as a “secondary” DNS server, it actually pulls the necessary files from its master counterpart, making configuration...

When you’re trying to access a website, you type in the name you are looking  for and it comes up. In the background, though, Domain Name Service (DNS) is what translates that website name into an IP address so that the site may be accessed. This...

Once the FTP  setup is complete, you need to test the FTP server from one of the clients, Client01. To save time during the exam and when testing in the real world, you can use the command-line FTP client lftp.

A proxy server is a device that usually sits between a client and the destination the user is trying to reach. It can provide security, anonymity, and even protection for the client behind the proxy. To help in this process is Squid, which is a web...

The most commonly used web server in the world today is Apache—and with good reason. Built with security in mind, Apache is a solid and stable web server that has been around for years. The module design allows for scalability and ease of use. Apache can...