iptables -t nat -N ISTIO_POSTRT
iptables -t nat -A POSTROUTING -j ISTIO_POSTRT

iptables -t nat -N ISTIO_POSTRT
iptables -t nat -A POSTROUTING -j ISTIO_POSTRT
iptables -t nat -A ISTIO_POSTRT -m owner --socket-exists -p tcp -m set --match-set istio-inpod-probes-v4 dst -j SNAT --to-source 169.254.7.127
ip6tables -t nat -N ISTIO_POSTRT
ip6tables -t nat -A POSTROUTING -j ISTIO_POSTRT

const (
	INPUT       = "INPUT"
	OUTPUT      = "OUTPUT"
	FORWARD     = "FORWARD"
	PREROUTING  = "PREROUTING"
	POSTROUTING = "POSTROUTING"
)

var BuiltInChainsMap = map[string]struct{}{
	INPUT:       {},
	OUTPUT:      {},
	FORWARD:     {},
	PREROUTING:  {},
	POSTROUTING: {},
}

// Constants used for generating iptables commands
const (
	TCP = "tcp"
	UDP = "udp"

	TPROXY   = "TPROXY"