The Sigma BC 506 bike computer measures current speed, trip distance, trip time, total distance and displays current time. In order to do so, the computer must know the correct wheel size. In this example, we will configure the computer.
We measure the distance, that the bike wheel rolls in one rotation. 2.133 mm.
We insert the [...]

BackTrack is the highest rated and acclaimed Linux security distribution to date. BackTrack is a Linux-based penetration testing arsenal, that aids security professionals in the ability to perform assessments in a purely native environment, dedicated to hacking.
In this example, we will create a bootable live version of BackTrack on an USB key, [...]

In this example, we will configure a computer, that is running a live boot BackTrack Linux operating system, manually for internet access.
We bring the network interface eth0 up. We assign the static internet protocol (IP) address 192.168.1.120 to it. We create a default route to the local router 192.168.1.1. This router is connected to the [...]

In this example, we will configure a Sendmail mail server on a FreeBSD operating system to reject mail from a domain.
We edit the access control file, which controls the operation of the mail server based on networks, domains, mail address users and mail addresses.
cd /etc/mail
nano access
We add two domains from which we do not want [...]

If your network router does not allow you to connect to a local host from a local host using the internet address, it is possible, that your router or firewall does not have the network address translation (NAT) loopback option activated. This is not unusual for standard ADSL broadband routers. Unfortunately, this option is not [...]