Our last article on Ubuntu security suggestions touched on the importance of passwords, user roles, console security, and firewalls. We continue with our last article and while the recommendations below are not unique to Ubuntu specifically (nearly all discussed are considered best practice for any Linux server) but they should be an important consideration in securing your server. Continue reading “How Do I Secure My Linux Server?”
How do IPv4 and IPv6 compare?
Both IPv4 and IPv6 addresses are used to identify a servers location and possibly identity other computers within a network. Assigned IP addresses allow those computers to find and communicate with other computers across a network.
The main difference between the IPv4 and IPv6 addresses is the number of available IP assignments each protocol can allow for or use. IPv4 provides 232, or a combination of 4,294,967,296 IP addresses and IPv6 can have approximately 3.4×1038 addresses which are a little more than 7.9×1028 times as many as IPv4! (that’s a lot of math!)
Reading Time: 1 minutelocalhost is a networking term; it’s the hostname for the loopback network interface of whichever server it’s said in reference to (meaning every server has a ‘localhost‘). The loopback interface bypasses any local network interface hardware, and serves as a method to connect back to the server itself. The term localhost is used often in both networking and in server administration.
The IPv4 address for localhost, or the loopback network interface, is 127.0.0.1.
The IPv6 address for localhost, or the loopback network interface, is ::1.