IPv6 has ‘been coming’ ferlike a Thousand Years, and all that time it’s been this horrifically awful thing that I instinctively turn off, like bad music.
Disable IPv6 on Debian:
vi /etc/sysctl.d/70-disable-ipv6.conf
insert:
# disable all nics net.ipv6.conf.all.disable_ipv6 = 1 # disable particular nic # net.ipv6.conf.enp0s3.disable_ipv6 = 1 # after save, run: # sysctl -p -f /etc/sysctl.d/70-disable-ipv6.conf
This disablement let the 15-second delay at every whois lookup vanish into imperceptibility.
The only “reason” I can think of for this long, awful push is to enable the dreaded IoT (Internet of Things), gain control of every kernel of rice and grain of sand, and do away with the much-less-controllable IPv4. With solid, fast NAT now commonplace capability, why the continued pain? Nothing has that much self-inertia. Someone very powerful wants IPv6 (and IoT), and it’s absolutely not a single genuine technical person I know.