Tags: IPv4

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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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iptables
This screenshot of /etc/protocols shows the correct protocol names to use in iptables rules; get details from Carla Schroder in this tutorial.

How to Write iptables Rules for IPv6

We US-ians have been sheltered from the exhaustion of IPv4 addresses, but they have run out. IPv6 networks are up and running, so we have no excuses for not being IPv6 literate. Today our scintillating topic is iptables rules for IPv6, because, I am sad to report, our faithful IPv4 iptables rules...
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Egyptian scribe
Old file-copying tools like SCP, SSH, and Rsync are all IPv6-ready, but they have syntax quirks you need to know to make them work.

Remote Sessions Over IPv6 with SSH, SCP, and Rsync

Our familiar old file-copying friends SSH, SCP, and Rsync are all IPv6-ready, which is the good news. The bad news is they have syntax quirks which you must learn to make them work. Before we get into the details, though, you might want to review the previous installments in our meandering IPv6...
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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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IP addressing
Learn the basics of private and link local addressing in this tutorial from Carla Schroder.

Practical Networking for Linux Admins: IPv4 and IPv6 LAN Addressing

We're cruising now. We know important basics about TCP/IP and IPv6. Today we're learning about private and link-local addressing. Yes, I know, I promised routing. That comes next. Private Address Spaces IPv4 and IPv6 both have private address spaces. These are not meant to leave your private...
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IP addresses
Allocation of IPv4 address space: the United States uses more than a third of the available IPv4 addresses.

Practical Networking for Linux Admins: Real IPv6

When last we met, we reviewed essential TCP/IP basics for Linux admins in Practical Networking for Linux Admins: TCP/IP. Here, we will review network and host addressing and find out whatever happened to IPv6? IPv4 Ran Out Already Once upon a time, alarms were sounding everywhere: We are running...
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