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HOME  >  SOFTWARE  >  LINUX

How to disable ipv6 on a Debian server



You may not be interested in using the ipv6 protocol, so you want to disable it to recover CPU and memory resources that might be exploited.

To disable ipv6, enter the following command line in the SSH interface:

echo net.ipv6.conf.all.disable_ipv6=1 > /etc/sysctl.d/disableipv6.conf
sed ‘/::/s/^/#/’ /etc/hosts >/etc/dipv6-tmp;cp -a /etc/hosts /etc/hosts-backup && mv /etc/dipv6-tmp /etc/hosts
sed ‘/ipv6=yes/s/yes/no/’ /etc/avahi/avahi-daemon.conf >/etc/avahi/dipv6-tmp;cp -a /etc/avahi/avahi-daemon.conf /etc/avahi/avahi-daemon.conf-backup && mv /etc/avahi/dipv6-tmp /etc/avahi/avahi-daemon.conf

Finally, restart your server:

sudo service apache2 restart

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