SNAT


Now to add the rule

iptables -t nat -A POSTROUTING -o ppp0
 	-j MASQUERADE

or

iptables -t nat -A POSTROUTING -o ppp0 -j SNAT
 	--to 192.168.99.22

This will perform SNAT (or MASQUERADE) on all connections going out via ppp0 (determined by the
routinglookup)