diff --git a/rc/bashrc b/rc/bashrc
index 3fcc372c..d7c8c5b5 100644
--- a/rc/bashrc
+++ b/rc/bashrc
@@ -823,6 +823,7 @@ function sysctl-mikaela() {
    set -x
    sysctl kernel.core_pattern=%e-%p-%h.core
    sysctl vm.swappiness=1
+   sysctl net.ipv6.bindv6only=1
    sysctl net.ipv6.conf.eth0.use_tempaddr=2
    sysctl net.ipv6.conf.wlan0.use_tempaddr=2
    echo 'If network-manager is used, see /etc/NetworkManager/system-connections/<connection>'
@@ -834,6 +835,7 @@ function sysctl-mikaela-run() {
     set -x
     echo kernel.core_pattern = %e-%p-%h.core >> /etc/sysctl.conf
     echo vm.swappiness = 1 >> /etc/sysctl.conf
+    echo net.ipv6.bindv6only=1 >> /etc/sysctl.conf
     echo net.ipv6.conf.eth0.use_tempaddr=2 >> /etc/sysctl.conf
     echo net.ipv6.conf.wlan0.use_tempaddr=2 >> /etc/sysctl.conf
     sysctl -p
diff --git a/rc/zshrc b/rc/zshrc
index 895bea60..f00c19e2 100644
--- a/rc/zshrc
+++ b/rc/zshrc
@@ -801,6 +801,7 @@ function sysctl-mikaela() {
    set -x
    sysctl kernel.core_pattern=%e-%p-%h.core
    sysctl vm.swappiness=1
+   sysctl net.ipv6.bindv6only=1
    sysctl net.ipv6.conf.eth0.use_tempaddr=2
    sysctl net.ipv6.conf.wlan0.use_tempaddr=2
    echo 'If network-manager is used, see /etc/NetworkManager/system-connections/<connection>'
@@ -812,6 +813,7 @@ function sysctl-mikaela-run() {
     set -x
     echo kernel.core_pattern = %e-%p-%h.core >> /etc/sysctl.conf
     echo vm.swappiness = 1 >> /etc/sysctl.conf
+    echo net.ipv6.bindv6only=1 >> /etc/sysctl.conf
     echo net.ipv6.conf.eth0.use_tempaddr=2 >> /etc/sysctl.conf
     echo net.ipv6.conf.wlan0.use_tempaddr=2 >> /etc/sysctl.conf
     echo 'If network-manager is used, see /etc/NetworkManager/system-connections/<connection>'