diff --git a/scripts/compute-ext-net.sh b/scripts/compute-ext-net.sh
index af0d2a2..762d37f 100755
--- a/scripts/compute-ext-net.sh
+++ b/scripts/compute-ext-net.sh
@@ -9,3 +9,4 @@
 ifconfig veth1 up
 brctl addif databr veth0
 iptables -t nat -A POSTROUTING -s 10.168.0.0/24 \! -d 10.168.0.0/24 -j MASQUERADE
+sysctl -w net.ipv4.ip_forward=1