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

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

	iptablesBuilder.AppendRuleV4(
		iptableslog.UndefinedCommand, ChainHostPostrouting, iptablesconstants.NAT,
		"-m", "owner",
		"--socket-exists",
		"-p", "tcp",
		"-m", "set",
		"--match-set", fmt.Sprintf(ipset.V4Name, ProbeIPSet),
		"dst",
		"-j", "SNAT",
		"--to-source", hostSNATIP.String(),
	)

| HOST_PROBE_SNAT_IP | "169.254.7.127" | Applied to SNAT host probe packets, so they can be identified/skipped podside. Any link-local address in the 169.254.0.0/16 block can be used |

	HostProbeSNATIPV6 = netip.MustParseAddr(env.RegisterStringVar("HOST_PROBE_SNAT_IPV6", DefaultHostProbeSNATIPV6, "").Get())
)

const (
	// to reliably identify kubelet healthprobes from inside the pod (versus standard kube-proxy traffic,
	// since the IP is normally the same), we SNAT identified host probes in the host netns to a fixed

iptables -t nat -A ISTIO_OUTPUT ! -o lo -p udp -m udp --dport 53 -j REDIRECT --to-port 15053
iptables -t nat -A ISTIO_OUTPUT -p tcp -m mark --mark 0x111/0xfff -j ACCEPT
iptables -t nat -A ISTIO_OUTPUT ! -d 127.0.0.1/32 -o lo -j ACCEPT

                    "typed_config": {
                      "@type": "type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.HttpConnectionManager",
                      "stat_prefix": "agent",
                      "route_config": {
                        "virtual_hosts": [
                          {
                            "name": "backend",
                            "domains": [

                      "typed_config": {
                        "@type": "type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.HttpConnectionManager",
                        "stat_prefix": "connect_terminate",
                        "route_config": {
                          "name": "default",
                          "virtual_hosts": [
                            {

          "format": "time_series",
          "intervalFactor": 1,
          "refId": "A",
          "step": 4
        }
      ],
      "title": "Client Request Volume",
      "type": "stat"
    },
    {
      "datasource": {
        "type": "prometheus",
        "uid": "${datasource}"
      },
      "fieldConfig": {
        "defaults": {
          "color": {

// limitations under the License.

package nodeagent

import (
	"fmt"
	"io/fs"
	"syscall"
)

func GetInode(fi fs.FileInfo) (uint64, error) {
	if stat, ok := fi.Sys().(*syscall.Stat_t); ok {
		return stat.Ino, nil
	}
	return 0, fmt.Errorf("unable to get inode")