disable IPv6

provision/provision.sh

@@ -8,6 +8,17 @@ config_domain=$(hostname --domain)
 echo "127.0.0.1 $config_fqdn" >>/etc/hosts
 
 
+# disable IPv6.
+cat >/etc/sysctl.d/98-disable-ipv6.conf <<'EOF'
+net.ipv6.conf.all.disable_ipv6 = 1
+net.ipv6.conf.default.disable_ipv6 = 1
+net.ipv6.conf.lo.disable_ipv6 = 1
+EOF
+systemctl restart procps
+sed -i -E 's,(GRUB_CMDLINE_LINUX=.+)",\1 ipv6.disable=1",' /etc/default/grub
+update-grub2
+
+
 # update the package cache.
 apt-get -y update