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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"><meta name=description content="An open source, self-hosted implementation of the Tailscale control server."><meta name=author content="Headscale authors"><link href=https://juanfont.github.io/headscale/development/ref/acls/ rel=canonical><link href=../tls/ rel=prev><link href=../dns/ rel=next><link rel=icon href=../../assets/favicon.png><meta name=generator content="mkdocs-1.6.1, mkdocs-material-9.7.0"><title>ACLs - Headscale</title><link rel=stylesheet href=../../assets/stylesheets/main.618322db.min.css><link rel=stylesheet href=../../assets/stylesheets/palette.ab4e12ef.min.css><link rel=preconnect href=https://fonts.gstatic.com crossorigin><link rel=stylesheet href="https://fonts.googleapis.com/css?family=Roboto:300,300i,400,400i,700,700i%7CRoboto+Mono:400,400i,700,700i&display=fallback"><style>:root{--md-text-font:"Roboto";--md-code-font:"Roboto Mono"}</style><script>__md_scope=new URL("../..",location),__md_hash=e=>[...e].reduce(((e,_)=>(e<<5)-e+_.charCodeAt(0)),0),__md_get=(e,_=localStorage,t=__md_scope)=>JSON.parse(_.getItem(t.pathname+"."+e)),__md_set=(e,_,t=localStorage,a=__md_scope)=>{try{t.setItem(a.pathname+"."+e,JSON.stringify(_))}catch(e){}}</script><meta property=og:type content=website><meta property=og:title content="ACLs - 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 </span></code></pre></div> </li> <li> <p><a href=https://tailscale.com/kb/1192/acl-samples#deny-all><strong>Deny All</strong></a>: To prevent all communication within your tailnet, you can include an empty array for the <code>"acls"</code> field in your policy file.</p> <div class="language-json highlight"><pre><span></span><code><span id=__span-1-1><a id=__codelineno-1-1 name=__codelineno-1-1 href=#__codelineno-1-1></a><span class=p>{</span>
 </span><span id=__span-1-2><a id=__codelineno-1-2 name=__codelineno-1-2 href=#__codelineno-1-2></a><span class=w>  </span><span class=nt>&quot;acls&quot;</span><span class=p>:</span><span class=w> </span><span class=p>[]</span>
 </span><span id=__span-1-3><a id=__codelineno-1-3 name=__codelineno-1-3 href=#__codelineno-1-3></a><span class=p>}</span>
-</span></code></pre></div> </li> </ul> <h2 id=complex-example>Complex Example<a class=headerlink href=#complex-example title="Permanent link">&para;</a></h2> <p>Let's build a more complex example use case for a small business (It may be the place where ACL's are the most useful).</p> <p>We have a small company with a boss, an admin, two developers and an intern.</p> <p>The boss should have access to all servers but not to the user's hosts. Admin should also have access to all hosts except that their permissions should be limited to maintaining the hosts (for example purposes). The developers can do anything they want on dev hosts but only watch on productions hosts. Intern can only interact with the development servers.</p> <p>There's an additional server that acts as a router, connecting the VPN users to an internal network <code>10.20.0.0/16</code>. Developers must have access to those internal resources.</p> <p>Each user have at least a device connected to the network and we have some servers.</p> <ul> <li>database.prod</li> <li>database.dev</li> <li>app-server1.prod</li> <li>app-server1.dev</li> <li>billing.internal</li> <li>router.internal</li> </ul> <p><img alt="ACL implementation example" src=../../images/headscale-acl-network.png></p> <p>When <a href=../../usage/getting-started/#register-a-node>registering the servers</a> we will need to add the flag <code>--advertise-tags=tag:&lt;tag1&gt;,tag:&lt;tag2&gt;</code>, and the user that is registering the server should be allowed to do it. Since anyone can add tags to a server they can register, the check of the tags is done on headscale server and only valid tags are applied. A tag is valid if the user that is registering it is allowed to do it.</p> <p>Here are the ACL's to implement the same permissions as above:</p> <div class="language-json highlight"><span class=filename>acl.json</span><pre><span></span><code><span id=__span-2-1><a id=__codelineno-2-1 name=__codelineno-2-1 href=#__codelineno-2-1></a><span class=p>{</span>
+</span></code></pre></div> </li> </ul> <h2 id=complex-example>Complex Example<a class=headerlink href=#complex-example title="Permanent link">&para;</a></h2> <p>Let's build a more complex example use case for a small business (It may be the place where ACL's are the most useful).</p> <p>We have a small company with a boss, an admin, two developers and an intern.</p> <p>The boss should have access to all servers but not to the user's hosts. Admin should also have access to all hosts except that their permissions should be limited to maintaining the hosts (for example purposes). The developers can do anything they want on dev hosts but only watch on productions hosts. Intern can only interact with the development servers.</p> <p>There's an additional server that acts as a router, connecting the VPN users to an internal network <code>10.20.0.0/16</code>. Developers must have access to those internal resources.</p> <p>Each user have at least a device connected to the network and we have some servers.</p> <ul> <li>database.prod</li> <li>database.dev</li> <li>app-server1.prod</li> <li>app-server1.dev</li> <li>billing.internal</li> <li>router.internal</li> </ul> <p><img alt="ACL implementation example" src=../../assets/images/headscale-acl-network.png></p> <p>When <a href=../../usage/getting-started/#register-a-node>registering the servers</a> we will need to add the flag <code>--advertise-tags=tag:&lt;tag1&gt;,tag:&lt;tag2&gt;</code>, and the user that is registering the server should be allowed to do it. Since anyone can add tags to a server they can register, the check of the tags is done on headscale server and only valid tags are applied. A tag is valid if the user that is registering it is allowed to do it.</p> <p>Here are the ACL's to implement the same permissions as above:</p> <div class="language-json highlight"><span class=filename>acl.json</span><pre><span></span><code><span id=__span-2-1><a id=__codelineno-2-1 name=__codelineno-2-1 href=#__codelineno-2-1></a><span class=p>{</span>
 </span><span id=__span-2-2><a id=__codelineno-2-2 name=__codelineno-2-2 href=#__codelineno-2-2></a><span class=w>  </span><span class=c1>// groups are collections of users having a common scope. A user can be in multiple groups</span>
 </span><span id=__span-2-3><a id=__codelineno-2-3 name=__codelineno-2-3 href=#__codelineno-2-3></a><span class=w>  </span><span class=c1>// groups cannot be composed of groups</span>
 </span><span id=__span-2-4><a id=__codelineno-2-4 name=__codelineno-2-4 href=#__codelineno-2-4></a><span class=w>  </span><span class=nt>&quot;groups&quot;</span><span class=p>:</span><span class=w> </span><span class=p>{</span>