Hi, On Sun, Jan 23, 2022 at 04:08:34PM -0500, gene heskett wrote: > So what is the official, works in bookworm every time, way to totally > kill ipv6, making it use ipv4 for everything?
You don't need to; having IPv6 active doesn't cause any problem even if you don't have a default route that supports IPv6. If it does cause a problem then there is a misconfiguration to be solved. You are wasting your time and introducing more places where you can make a configuration error resulting in yet another of your megathreads¹. However, if for your own eccentric reasons you insist: # echo 'net.ipv6.conf.all.disable_ipv6=1' > /etc/sysctl.d/disableipv6.conf will disable it from the next boot. You can use: # sysctl --system to re-apply all sysctl configs immediately, so disabling IPv6 without needing to reboot. > This ought to be in a faq somewhere. Except everybody has their own > method. :( The first google hit for "debian disable IPv6" is: https://www.itzgeek.com/how-tos/linux/debian/how-to-disable-ipv6-on-debian-9-ubuntu-16-04.html which includes the above method. It's not a great page but it does contain that info. So even this highly unusual requirement has a very easy to find solution. Regards, Andy ¹ Your decision to use Debian testing seems likely to generate some more of those threads. But I expect you won't be persuaded to stick with stable. -- https://bitfolk.com/ -- No-nonsense VPS hosting