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<!doctype html><html lang=en class=no-js> <head><meta charset=utf-8><meta name=viewport content="width=device-width,initial-scale=1"><link href=https://kubernetes.github.io/ingress-nginx/user-guide/retaining-client-ipaddress/ rel=canonical><link rel="shortcut icon" href=../../assets/images/favicon.png><meta name=generator content="mkdocs-1.1.2, mkdocs-material-6.2.4"><title>Retaining client ipaddress - Ingress-Nginx Controller</title><link rel=stylesheet href=../../assets/stylesheets/main.15aa0b43.min.css><link rel=stylesheet href=../../assets/stylesheets/palette.75751829.min.css><meta name=theme-color content=#009485><link rel=preconnect href=https://fonts.gstatic.com crossorigin><link rel=stylesheet href="https://fonts.googleapis.com/css?family=Roboto:300,400,400i,700%7CRoboto+Mono&display=fallback"><style>body,input{font-family:"Roboto",-apple-system,BlinkMacSystemFont,Helvetica,Arial,sans-serif}code,kbd,pre{font-family:"Roboto 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href=#retaining-client-ipaddress class=md-nav__link> Retaining Client IPAddress </a> <nav class=md-nav aria-label="Retaining Client IPAddress"> <ul class=md-nav__list> <li class=md-nav__item> <a href=#using-proxy-protocol class=md-nav__link> Using proxy-protocol </a> </li> <li class=md-nav__item> <a href=#using-the-k8s-spec-servicespecexternaltrafficpolicy class=md-nav__link> Using the K8S spec service.spec.externalTrafficPolicy </a> </li> </ul> </nav> </li> </ul> </nav> </div> </div> </div> <div class=md-content> <article class="md-content__inner md-typeset"> <a href=https://github.com/kubernetes/ingress-nginx/edit/main/docs/user-guide/retaining-client-ipaddress.md title="Edit this page" class="md-content__button md-icon"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M20.71 7.04c.39-.39.39-1.04 0-1.41l-2.34-2.34c-.37-.39-1.02-.39-1.41 0l-1.84 1.83 3.75 3.75M3 17.25V21h3.75L17.81 9.93l-3.75-3.75L3 17.25z"/></svg> </a> <h1>Retaining client ipaddress</h1> <h2 id=retaining-client-ipaddress>Retaining Client IPAddress<a class=headerlink href=#retaining-client-ipaddress title="Permanent link"></a></h2> <p>Please read this https://kubernetes.github.io/ingress-nginx/user-guide/miscellaneous/#source-ip-address , to get details of retaining the client IPAddress.</p> <h3 id=using-proxy-protocol>Using proxy-protocol<a class=headerlink href=#using-proxy-protocol title="Permanent link"></a></h3> <p>Please read this https://kubernetes.github.io/ingress-nginx/user-guide/miscellaneous/#proxy-protocol , to use proxy-protocol for retaining client IPAddress</p> <h3 id=using-the-k8s-spec-servicespecexternaltrafficpolicy>Using the K8S spec service.spec.externalTrafficPolicy<a class=headerlink href=#using-the-k8s-spec-servicespecexternaltrafficpolicy title="Permanent link"></a></h3> <div class=highlight><pre><span></span><code>% kubectl explain service.spec.externalTrafficPolicy
KIND: Service
VERSION: v1
FIELD: externalTrafficPolicy &lt;string&gt;
DESCRIPTION:
externalTrafficPolicy describes how nodes distribute service traffic they
receive on one of the Service&#39;s &quot;externally-facing&quot; addresses (NodePorts,
ExternalIPs, and LoadBalancer IPs). If set to &quot;Local&quot;, the proxy will
configure the service in a way that assumes that external load balancers
will take care of balancing the service traffic between nodes, and so each
node will deliver traffic only to the node-local endpoints of the service,
without masquerading the client source IP. (Traffic mistakenly sent to a
node with no endpoints will be dropped.) The default value, &quot;Cluster&quot;, uses
the standard behavior of routing to all endpoints evenly (possibly modified
by topology and other features). Note that traffic sent to an External IP or
LoadBalancer IP from within the cluster will always get &quot;Cluster&quot; semantics,
but clients sending to a NodePort from within the cluster may need to take
traffic policy into account when picking a node.
Possible enum values:
- `&quot;Cluster&quot;` routes traffic to all endpoints.
- `&quot;Local&quot;` preserves the source IP of the traffic by routing only to
endpoints on the same node as the traffic was received on (dropping the
traffic if there are no local endpoints).
</code></pre></div> <ul> <li>Setting the field <code>externalTrafficPolicy</code>, in the ingress-controller service, to a value of <code>Local</code> retains the client's ipaddress, within the scope explained above</li> </ul> </article> </div> </div> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-footer-copyright> Made with <a href=https://squidfunk.github.io/mkdocs-material/ target=_blank rel=noopener> Material for MkDocs </a> </div> </div> </div> </footer> </div> <script src=../../assets/javascripts/vendor.93c04032.min.js></script> <script src=../../assets/javascripts/bundle.83e5331e.min.js></script><script id=__lang type=application/json>{"clipboard.copy": "Copy to clipboard", "clipboard.copied": "Copied to clipboard", "search.config.lang": "en", "search.config.pipeline": "trimmer, stopWordFilter", "search.config.separator": "[\\s\\-]+", "search.placeholder": "Search", "search.result.placeholder": "Type to start searching", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.term.missing": "Missing"}</script> <script>
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