diff --git a/HowtoIPv6.md b/HowtoIPv6.md
index fc93fdb5..edd4df7a 100644
--- a/HowtoIPv6.md
+++ b/HowtoIPv6.md
@@ -263,3 +263,13 @@ Dans /etc/network/interfaces :
         iface br0 inet manual
         bridge_ports eth0
         up echo 0 > /sys/class/net/br0/bridge/multicast_snooping
+
+## Désactivation IPv6
+
+### Debian
+
+Pour désactiver l'IPv6 sur toutes les interfaces :
+~~~(sh)
+# printf 'net.ipv6.conf.all.disable_ipv6 = 1\nnet.ipv6.conf.default.disable_ipv6 = 1\n' > /etc/sysctl.d/zzz-disable-ipv6.conf
+# sysctl -p /etc/sysctl.d/zzz-disable-ipv6.conf
+~~~
\ No newline at end of file