Disable IPv6 on Linux and OpenWRT

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Let's see how and why disabling IPv6 on GNU/Linux systems and on OpenWRT routers.

WARNING: disabling IPv6 may have unintended consequences. Services are designed to run in dual stack mode. If you want to run a server exclusively in IPv4 mode you'll need to change lots of configuration files, potentially one for each service!

Timestamps:

0:00 Intro
0:10 Reasons to disable IPv6
0:40 Disabling IPv6 on GNU/Linux and check if it works
1:19 Fix OpenSSH
1:42 Fix Unbound and notes on other services
2:00 Android problem with IPv6 DNS server and solution when using it with OpenWRT
2:31 Disable IPv6 on OpenWRT
2:57 Outtro

#ipv6 #gnulinux #openwrt #solvecomputerscience