Vagrant LaunchDaemon to forward ports Reference : http://www.dmuth.org/node/1404/web-development-port-80-and-443-vagrant

ipfw.conf

#
# Flush all of our pre-existing rules.
#
flush
 
#
# Forward port 80 to our Vagrant instance.
#
add 100 fwd 127.0.0.1,8080 tcp from any to me 80
 
#
# Same deal for port 443
# 
add 101 fwd 127.0.0.1,8443 tcp from any to me 443

org.premist.vagrant.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>Label</key>
	<string>org.premist.vagrant</string>
	<key>Program</key>
	<string>/sbin/ipfw</string>
	<key>RunAtLoad</key>
	<true/>
	<key>ProgramArguments</key>
	<array>
		<string>/sbin/ipfw</string>
		<string>-q</string>
		<string>/etc/ipfw.conf</string>
	</array>
</dict>
</plist>