Debian 11: How to disable IPv6
In a Debian 11 system, I would like to disable IPv6 adapters in order to
persuade fetchmail to talk to exim4. The advice generally given is to add a
line to /etc/sysctl.conf
net.ipv6.conf.all.disable_ipv6 = 1
and run sysctl -p as root. With Debian 11 this generates the error message
sysctl: cannot stat /proc/sys/net/ipv6/conf/all/disable_ipv6: No such file or directory
because directory /proc/sys/net/ipv6 doesn't exist. What is the new way of
disabling IPv6?
Roger
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