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List:       opensuse
Subject:    Re: Disable IPv6?
From:       Felix Miata <mrmazda () earthlink ! net>
Date:       2024-01-21 19:38:59
Message-ID: d0f3d48b-2efd-a594-b750-838056df447e () earthlink ! net
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joe a composed on 2024-01-21 13:58 (UTC-0500):

> While chasing other issues, noticed that listing ports in use (open) 
> using socklist shows some services have tcp6 and udp6 listed.
 
> This puzzles me as IPv6 is disabled, not checked as enabled, in network 
> config via YAST.
 
> I thought that disabled IPv6 entirely?  Not so?

I use only systemd-network, so can't configure using YaST. Here's evidence of
disabling here:

# dmesg | grep -i ipv6
[    0.000000] Command line: <...> ipv6.disable=1 <...>
[    0.018438] Kernel command line: <...> ipv6.disable=1 <...>
[    0.885953] IPv6: Loaded, but administratively disabled, reboot required to enable
[    5.020243] systemd[1]: Binding to IPv6 address not available since kernel does \
not support IPv6. [    5.020249] systemd[1]: Binding to IPv6 address not available \
since kernel does not support IPv6. # grep -Rnwi /etc -e 'ipv6' | grep -i able
/etc/slp.conf:291:# that IPv4 is enabled, and IPv6 is disabled.  Uncomment one or \
                other of the
/etc/sysctl.conf-ipv6-disable:21:net.ipv6.conf.all.disable_ipv6 = 1
/etc/sysctl.d/local.conf:2:net.ipv6.conf.all.disable_ipv6 = 1
/etc/sysconfig/network/dhcp:151:# IPv6 router RA and DHCLIENT6_MODE variable):
/etc/sysconfig/network/config:27:# happen "post-mortem" and maybe even cause to \
                disable ipv6 at all.
/etc/sysconfig/windowmanager:44:# To disable IPv6 support within KDE. It might solve \
large timeouts due to #
Lots of configuration stuff addressing ipv6 in Leap:
# grep -Rnwi /etc -e 'ipv6' | wc -l
151
#
-- 
Evolution as taught in public schools is, like religion,
	based on faith, not based on science.

 Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!

Felix Miata


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