common/devstack/net-fix.sh - service-profile - Gitiles

 #!/bin/sh

 PRIMARY=$( route | grep default | awk '{print $NF}' )
 RULE="POSTROUTING -t nat -o $PRIMARY -s 172.24.4.0/24 -j MASQUERADE"

 iptables -C $RULE || iptables -A $RULE
	#!/bin/sh

	PRIMARY=$( route \| grep default \| awk '{print $NF}' )
	RULE="POSTROUTING -t nat -o $PRIMARY -s 172.24.4.0/24 -j MASQUERADE"

	iptables -C $RULE \|\| iptables -A $RULE