IPv6 Subnetting

Before you start it is recommended to go through the article first: IPv6 Address Representation IPv6 subnetting is similar to IPv4. However, people sometimes get confused due to the hex representation of IPv6 address. I’ll show you some examples of IPv6 subnetting and will explain why it is better to subnet on a Nibble bit boundary. But before

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IPv6 Bogon Routes

Bogon routes or martian routes are the prefixes that should not be present in the global routing table simply because those prefixes are not really allocated to any organisation by the RIR. Like IPv4, we have a list of IPv6 bogon routes: 2001::/32 le 128: Teredo subnets 2001:db8::/32 le 128: Documentation 2002::/16 le 128: 6to4

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Enable or Disable IPv6 on Linux

Here’s how to disable IPv6 on a Red Hat-based system: Open a terminal window. Change to the root user. Issue the command sysctl -w net.ipv6.conf.all.disable_ipv6=1 sysctl -w net.ipv6.conf.default.disable_ipv6=1 To re-enable IPv6, issue the following commands: sysctl -w net.ipv6.conf.all.disable_ipv6=0 sysctl -w net.ipv6.conf.default.disable_ipv6=0   Here’s how to disable IPv6 on a Debian-based machine: Open a terminal window.

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IPv6 Address Representation

IPv6 Addressing Format IPv6 Address is ridiculously 128-bit or 16-byte long compared to the 32-bit IPv4 address. We all know that and it actually scares many of us. Good news is IPv6 is represented in hexadecimal number format whereas IPv4 is in decimal number format. Hence, each four bit in an IPv6 address is shrunken

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IPv6 Public DNS Servers

Out of many, some of the public DNS servers that are available in IPv6 are listed below: Basic DNS: Google: 2001:4860:4860::8888 and 2001:4860:4860::8844 Hurricane Electric: 2001:470:20::2 Verisign: 2620:74:1b::1:1 and 2620:74:1c::2:2 Yandex: 2a02:6b8::feed:0ff and 2a02:6b8:0:1::feed:0ff Special DNS: Yandex Safe: 2a02:6b8::feed:bad and 2a02:6b8:0:1::feed:bad, which blocks “infected sites, fraudulent sites, and bots.” Yandex Family: 2a02:6b8::feed:a11 and 2a02:6b8:0:1::feed:a11, which blocks everything that Safe does, plus

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IPv6 Addressing Plan

Before you start it is recommended to go through the article first: IPv6 Subnetting If someone asks “what’s the best way to prepare an IPv6 addressing plan?”, probably the best answer would be “it depends!”. Because there is no single best answer to that question. Now, when you’re playing with address plan, there are some philosophical

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