How we handle this is [under discussion](https://docs.google.com/document/d/1uM1c3zzoehiijh1ZpZuJ1-SzuVVupenv8r5yuCaFshs/edit#heading=h.dwbqvwmg6ud3).

### Inbound

Traffic entering a pod over HBONE will be handled by the "inbound" code path, on port 15008.

    }

    /**
     * Serialize the inbound Model instance to a StringWriter, perform the regex replacement to resolve
     * POM expressions, then re-parse into the resolved Model instance.
     * <p>
     * <b>NOTE:</b> This will result in a different instance of Model being returned!!!
     *
     * @param model The inbound Model instance, to serialize and reference for expression resolution

)

var log = istiolog.RegisterScope("iptables", "iptables helper")

type Config struct {
	RestoreFormat bool `json:"RESTORE_FORMAT"`
	TraceLogging  bool `json:"IPTABLES_TRACE_LOGGING"`
	EnableIPv6    bool `json:"ENABLE_INBOUND_IPV6"`
	RedirectDNS   bool `json:"REDIRECT_DNS"`
}

type IptablesConfigurator struct {
	ext    dep.Dependencies
	nlDeps NetlinkDependencies
	cfg    *Config
	iptV   dep.IptablesVersion

  }

  /** Returns the negotiated protocol, or null if no protocol was negotiated. */
  open fun getSelectedProtocol(sslSocket: SSLSocket): String? = null

  /** For MockWebServer. This returns the inbound SNI names. */
  @SuppressLint("NewApi")
  @IgnoreJRERequirement // This function is overridden to require API >= 24.
  open fun getHandshakeServerNames(sslSocket: SSLSocket): List<String> {

	we := wg.Spec.Template
	ports := []string{}
	for _, v := range we.Ports {
		ports = append(ports, fmt.Sprint(v))
	}
	// respect the inbound port annotation and capture all traffic if no inbound ports are set
	portBehavior := "*"
	if len(ports) > 0 {
		portBehavior = strings.Join(ports, ",")
	}

    messages and `Long.MAX_VALUE` to never compress outbound messages. The default is 1024L which
    compresses messages of size 1 KiB and larger. (Inbound messages are compressed or not based on
    the web socket server's configuration.)
 *  New: Defer constructing `Inflater` and `Deflater` instances until they are needed. This saves

        "windowSizeIncrement == 0 || windowSizeIncrement > 0x7fffffffL: $windowSizeIncrement"
      }
      if (logger.isLoggable(FINE)) {
        logger.fine(
          frameLogWindowUpdate(
            inbound = false,
            streamId = streamId,
            length = 4,
            windowSizeIncrement = windowSizeIncrement,
          ),
        )
      }
      frameHeader(
        streamId = streamId,

// or '#'.
message HTTPIngressRuleValue {
  // paths is a collection of paths that map requests to backends.
  repeated HTTPIngressPath paths = 1;
}

// Ingress is a collection of rules that allow inbound connections to reach the
// endpoints defined by a backend. An Ingress can be configured to give services
// externally-reachable urls, load balance traffic, terminate SSL, offer name
// based virtual hosting etc.

- excludeInterfaces
- kubevirtInterfaces
- ISTIO_META_DNS_CAPTURE env variable on the proxy - enables dns redirect
- INVALID_DROP env var on proxy - changes behavior from reset to drop in iptables
- auto excluded inbound ports: 15020, 15021, 15090

The code automatically detects the proxyUID and proxyGID from RunAsUser/RunAsGroup and exclude them from interception, defaulting to 1337

### Overview

  istioctl proxy-config clusters <pod-name[.namespace]> --port 9080

  # Retrieve full cluster dump for clusters that are inbound with a FQDN of details.default.svc.cluster.local.
  istioctl proxy-config clusters <pod-name[.namespace]> --fqdn details.default.svc.cluster.local --direction inbound -o json

  # Retrieve cluster summary without using Kubernetes API
  ssh <user@hostname> 'curl localhost:15000/config_dump' > envoy-config.json