$commands = &reinterpolate <<"EOF";
iptables -t nat -N outbound-DMZ
foreach \$iface (keys \%ipAddress) {
  iptables -t nat -A outbound-DMZ -o \$iface -j SNAT --to-source \$ipAddress{\$iface}
}
iptables -t nat -A outbound-DMZ -j RETURN
iptables -t nat -A POSTROUTING -j outbound-DMZ
EOF