Control: tags -1 + unreproducible moreinfo Hi Dylan,
On Tue, Jun 06, 2023 at 05:19:38AM -0400, Dylan Morrison wrote: > Package: src:linux > Version: 6.0.8-1 > Severity: normal > Tags: ipv6 > X-Debbugs-Cc: dizzy@domad.science First a note on the version, 6.0.8-1 is not in testing, please update to 6.1.27-1. > Dear Maintainer, > > I am attempting to disable ipv6 entirely on this machine as it being enabled > is causing multiple issues with long connection timeouts etc, and I do not > have ipv6 support from my ISP nor do I use it locally. However, the generally > given advice to set net.ipv6.conf.all.disable_ipv6 to 1 is having no effect, > neither setting it in /etc/sysctl.conf nor using command line sysctl. Setting > net.conf.ipv6.<adapter>.disable_ipv6 works, and is what I am currently doing > for my primary network interface, but I would like ipv6 disabled globally. > This appears to be a kernel issue afaict, I'm not 100% up on how the sysctl > mechanism works, but yeah. After updating to 6.1.27, can you elaborate how IPv6 not disabled is observed? Note that reading net.ipv6.conf.all.disable_ipv6 and getting 1 is not an indicator of IPv6 beeing not disabled, cf. https://www.kernel.org/doc/html/latest/networking/ip-sysctl.html?highlight=conf/all/disable_ipv6 . What does 'ip add show' shows, and what does it show after executing sysctl net.ipv6.conf.all.disable_ipv6=1 ? ipv6 can as well entirely be disabled by using the disable_ipv6 kernel parameter, cf. https://www.kernel.org/doc/html/latest/admin-guide/kernel-parameters.html?highlight=disable_ipv6= that is e.g. adding ipv6.disable=1 to the kernel command line. Trough grub2 you could add # cat /etc/default/grub.d/ipv6.cfg GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX ipv6.disable_ipv6=1" and run update-grub2. I would like to understand what makes for you disabling it trough net.ipv6.conf.all.disable_ipv6 not work. Regards, Salvatore
