diff --git a/kubernetes/ha/lib/trigger.rb b/kubernetes/ha/lib/trigger.rb
index fb531a4..136bc0d 100644
--- a/kubernetes/ha/lib/trigger.rb
+++ b/kubernetes/ha/lib/trigger.rb
@@ -53,5 +53,8 @@
         system("vagrant ssh --no-tty -c 'cat /opt/certificates/admin.pem' " + k8s['cluster']['ha'] + " > ${HOME}/.kube/admin.pem")
         system("vagrant ssh --no-tty -c 'cat /opt/certificates/admin-key.pem' " + k8s['cluster']['ha'] + " > ${HOME}/.kube/admin-key.pem")
         system("kubectl config set-cluster kubernetes-the-hard-way --certificate-authority=${HOME}/.kube/ca.pem --embed-certs=true --server=https://#{k8s['ip_part']}.#{k8s['resources']['ha']['ip_prefix']}:6443 && kubectl config set-credentials admin --client-certificate=${HOME}/.kube/admin.pem --client-key=${HOME}/.kube/admin-key.pem && kubectl config set-context kubernetes-the-hard-way --cluster=kubernetes-the-hard-way --user=admin && kubectl config use-context kubernetes-the-hard-way")
+
+        # Deploying the DNS Cluster Add-on
+        system("kubectl apply -f https://storage.googleapis.com/kubernetes-the-hard-way/coredns-1.8.yaml")
     end
 end
diff --git a/kubernetes/ha/script/bootstrap.sh b/kubernetes/ha/script/bootstrap.sh
index 973aacb..91acaf9 100644
--- a/kubernetes/ha/script/bootstrap.sh
+++ b/kubernetes/ha/script/bootstrap.sh
@@ -54,3 +54,7 @@ mkdir -p /home/vagrant/certificates && chown vagrant:vagrant -R $_
 
 ufw enable <<<y
 ufw allow 22
+
+# The SSH connection was unexpectedly closed by the remote end
+echo "ClientAliveInterval 30" >> /etc/ssh/ssh_config
+echo "ClientAliveCountMax 5" >> /etc/ssh/ssh_config
\ No newline at end of file
diff --git a/kubernetes/ha/script/bootstrap_ha.sh b/kubernetes/ha/script/bootstrap_ha.sh
index e115c82..07036ee 100644
--- a/kubernetes/ha/script/bootstrap_ha.sh
+++ b/kubernetes/ha/script/bootstrap_ha.sh
@@ -58,4 +58,8 @@ ufw enable <<<y
 sudo ufw allow 2380/tcp
 ufw allow 443/tcp
 ufw allow 6443/tcp
-ufw allow 22
\ No newline at end of file
+ufw allow 22
+
+# The SSH connection was unexpectedly closed by the remote end
+echo "ClientAliveInterval 30" >> /etc/ssh/ssh_config
+echo "ClientAliveCountMax 5" >> /etc/ssh/ssh_config
\ No newline at end of file