Tags: IP address

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networking
We take a practical look at some TCP/IP fundamentals, so you can manage multiple network connections.

Practical Networking for Linux Admins: TCP/IP

Get to know networking basics with this tutorial from our archives. Linux grew up with a networking stack as part of its core, and networking is one of its strongest features. Let's take a practical look at some of the TCP/IP fundamentals we use every day. It's IP Address I have a peeve. OK, more...
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ipcalc
Learn how to use the essential ipcalc tool with these practical examples from Carla Schroder.

How to Calculate Network Addresses with ipcalc

The math behind IP addresses is convoluted. Our nice IPv4 addresses start out as 32-bit binary numbers, which are then converted to base 10 numbers in four 8-bit fields. Decimal numbers are easier to manage than long binary strings; still, calculating address ranges, netmasks, and subnets is a bit...
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routing
If you want your computers to talk to each other then you must know about routing; we're here to help clear the way.

Practical Networking for Linux Admins: IPv6 Routing

Our story so far: We have learned the important bits about TCP/IP, IPv6, and IPv4 and IPv6 LAN Addressing, which is all very excellent. But, if you want your computers to talk to each other, then you must know about routing. Simple Test Lab Now we have a good use for the ip command. ip assigns...
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DNS Infrastructure at GitHub

At GitHub we recently revamped how we do DNS from the ground up. This included both how we interact with external DNS providers and how we serve records internally to our hosts. To do this, we had to design and build a new DNS infrastructure that could scale with GitHub’s growth and across many...
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Now that HTTPS Is Almost Everywhere, What About IPv6?

Let’s Encrypt launched April 12, 2016 with the intent to support and encourage sites to enable HTTPS everywhere (sometimes referred to as SSL everywhere even though the web is steadily moving toward TLS as the preferred protocol). As of the end of February 2017, EFF estimates that half the web is...
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