diff --git a/test/e2e/reboot.go b/test/e2e/reboot.go
index c8e9a706af4..b8d2a1a1d70 100644
--- a/test/e2e/reboot.go
+++ b/test/e2e/reboot.go
@@ -79,14 +79,14 @@ var _ = Describe("Reboot", func() {
 	It("each node by switching off the network interface and ensure they function upon switch on", func() {
 		// switch the network interface off for a while to simulate a network outage
 		// We sleep 10 seconds to give some time for ssh command to cleanly finish before network is down.
-		testReboot(c, "nohup sh -c 'sleep 10 && sudo ifconfig eth0 down && sleep 120 && sudo ifconfig eth0 up' >/dev/null 2>&1 &")
+		testReboot(c, "nohup sh -c 'sleep 10 && sudo ifdown eth0 && sleep 120 && sudo ifup eth0' >/dev/null 2>&1 &")
 	})
 
 	It("each node by dropping all inbound packets for a while and ensure they function afterwards", func() {
 		// tell the firewall to drop all inbound packets for a while
 		// We sleep 10 seconds to give some time for ssh command to cleanly finish before starting dropping inbound packets.
 		// We still accept packages send from localhost to prevent monit from restarting kubelet.
-		testReboot(c, "nohup sh -c 'sleep 10 && sudo iptables -A INPUT -s 127.0.0.1 -j ACCEPT && sudo iptables -A INPUT -j DROP && "+
+		testReboot(c, "nohup sh -c 'sleep 10 && sudo iptables -I INPUT 1 -s 127.0.0.1 -j ACCEPT && sudo iptables -I INPUT 2 -j DROP && "+
 			" sleep 120 && sudo iptables -D INPUT -j DROP && sudo iptables -D INPUT -s 127.0.0.1 -j ACCEPT' >/dev/null 2>&1 &")
 	})
 
@@ -94,7 +94,7 @@ var _ = Describe("Reboot", func() {
 		// tell the firewall to drop all outbound packets for a while
 		// We sleep 10 seconds to give some time for ssh command to cleanly finish before starting dropping outbound packets.
 		// We still accept packages send to localhost to prevent monit from restarting kubelet.
-		testReboot(c, "nohup sh -c 'sleep 10 &&  sudo iptables -A OUTPUT -s 127.0.0.1 -j ACCEPT && sudo iptables -A OUTPUT -j DROP && "+
+		testReboot(c, "nohup sh -c 'sleep 10 &&  sudo iptables -I OUTPUT 1 -s 127.0.0.1 -j ACCEPT && sudo iptables -I OUTPUT 2 -j DROP && "+
 			" sleep 120 && sudo iptables -D OUTPUT -j DROP && sudo iptables -D OUTPUT -s 127.0.0.1 -j ACCEPT' >/dev/null 2>&1 &")
 	})
 })