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The issue seems to be in the firewall. When I allow an iOS app it permits the app to access the network, but the iOS simulator does not seem to have permissions."><meta property="og:type" content="article"><meta property="og:url" content="https://jimbobbennett.dev/blogs/firewall-issues-with-ios-simulators/"><meta property="og:image" content="https://jimbobbennett.dev/blogs/firewall-issues-with-ios-simulators/banner.png"><meta property="article:section" content="blogs"><meta property="article:published_time" content="2017-08-10T01:19:54+00:00"><meta property="article:modified_time" content="2017-08-10T01:19:54+00:00"><meta property="og:site_name" content="JimBobBennett"><meta name=twitter:card content="summary_large_image"><meta name=twitter:image content="https://jimbobbennett.dev/blogs/firewall-issues-with-ios-simulators/banner.png"><meta name=twitter:title content="Firewall issues with iOS simulators"><meta name=twitter:description content="I keep getting an annoying issue with my iOS simulators. When I run an app in a simulator that needs any form of network connection I get a dialog box popup from the built in Mac firewall asking if I want to allow incoming connections. Even though I click &lsquo;allow&rsquo;, I get asked this every time and it&rsquo;s getting tedious.
The issue seems to be in the firewall. When I allow an iOS app it permits the app to access the network, but the iOS simulator does not seem to have permissions."><meta name=twitter:site content="@jimbobbennett"><meta name=twitter:creator content="@jimbobbennett"><link rel=stylesheet href=https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/css/bootstrap.min.css integrity=sha384-1BmE4kWBq78iYhFldvKuhfTAU6auU8tT94WrHftjDbrCEXSU1oBoqyl2QvZ6jIW3 crossorigin=anonymous><link rel=stylesheet href=/css/header.css media=all><link rel=stylesheet href=/css/footer.css media=all><link rel=stylesheet href=/css/theme.css media=all><link rel="shortcut icon" type=image/png href=/fav.png><link rel="shortcut icon" sizes=192x192 href=/fav.png><link rel=apple-touch-icon href=/fav.png><link rel=alternate type=application/rss+xml href=https://jimbobbennett.dev/index.xml title=JimBobBennett><script type=text/javascript>(function(e,t,n,s,o,i,a){e[n]=e[n]||function(){(e[n].q=e[n].q||[]).push(arguments)},i=t.createElement(s),i.async=1,i.src="https://www.clarity.ms/tag/"+o,a=t.getElementsByTagName(s)[0],a.parentNode.insertBefore(i,a)})(window,document,"clarity","script","dctc2ydykv")</script><style>:root{--text-color:#343a40;--text-secondary-color:#6c757d;--background-color:#000;--secondary-background-color:#64ffda1a;--primary-color:#007bff;--secondary-color:#f8f9fa;--text-color-dark:#e4e6eb;--text-secondary-color-dark:#b0b3b8;--background-color-dark:#000000;--secondary-background-color-dark:#212529;--primary-color-dark:#ffffff;--secondary-color-dark:#212529}body{background-color:#000;font-size:1rem;font-weight:400;line-height:1.5;text-align:left}</style><meta name=description content><link rel=stylesheet href=/css/index.css><link rel=stylesheet href=/css/single.css><link rel=stylesheet href=/css/projects.css media=all><script defer src=/fontawesome-5/all-5.15.4.js></script><title>Firewall issues with iOS simulators | JimBobBennett</title></head><body class=light onload=loading()><header><nav class="pt-3 navbar navbar-expand-lg"><div class="container-fluid mx-xs-2 mx-sm-5 mx-md-5 mx-lg-5"><a class="navbar-brand primary-font text-wrap" href=/><img src=/fav.png width=30 height=30 class="d-inline-block align-top">
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<small>|</small>
Aug 10, 2017</div></div></div></section><section id=single><div class=container><div class="row justify-content-center"><div class="col-sm-12 col-md-12 col-lg-9"><div class=pr-lg-4><article class="page-content p-2"><p>I keep getting an annoying issue with my iOS simulators. When I run an app in a simulator that needs any form of network connection I get a dialog box popup from the built in Mac firewall asking if I want to allow incoming connections. Even though I click &lsquo;allow&rsquo;, I get asked this every time and it&rsquo;s getting tedious.</p><div class=image-div style=max-width:500px><p><img src=Screen-Shot-2017-08-10-at-13.10.13-1.png alt="Firewall request from the simulator"></p></div><p>The issue seems to be in the firewall. When I allow an iOS app it permits the app to access the network, but the iOS simulator does not seem to have permissions. The firewall gets confused - the simulator doesn&rsquo;t have permissions so the network request is blocked pending approval from me, but the firewall doesn&rsquo;t &lsquo;see&rsquo; the simulator, instead it sees the iOS app and gives that permission.</p><p>The problems comes from Xcode, it should set the firewall permissions when you install it but sometimes it fails. There is an easy fix - I&rsquo;ve got a script that opens up the firewall to the simulator. It turns the firewall off (so make sure you are disconnected from the internet or not anywhere dodgy), enables Xcode and the iOS simulator as a firewall exception, then turns it back on.</p><div class=highlight><pre tabindex=0 style=color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-bash data-lang=bash><span style=display:flex><span><span style=color:#75715e># temporarily shut firewall off:</span>
</span></span><span style=display:flex><span>sudo /usr/libexec/ApplicationFirewall/socketfilterfw --setglobalstate off
</span></span><span style=display:flex><span>
</span></span><span style=display:flex><span><span style=color:#75715e># put Xcode as an exception:</span>
</span></span><span style=display:flex><span>/usr/libexec/ApplicationFirewall/socketfilterfw --add /Applications/Xcode.app/Contents/MacOS/Xcode
</span></span><span style=display:flex><span>
</span></span><span style=display:flex><span><span style=color:#75715e># put iOS Simulator as an exception:</span>
</span></span><span style=display:flex><span>/usr/libexec/ApplicationFirewall/socketfilterfw --add /Applications/Xcode.app/Contents/Developer/Applications/Simulator.app/Contents/MacOS/Simulator
</span></span><span style=display:flex><span>
</span></span><span style=display:flex><span><span style=color:#75715e># re-enable firewall:</span>
</span></span><span style=display:flex><span>sudo /usr/libexec/ApplicationFirewall/socketfilterfw --setglobalstate on
</span></span></code></pre></div><p>Run this, give it your password as it needs <code>sudo</code> access and bingo, problem goes away. You may need to run this every time Xcode is updated though&mldr;</p></article></div></div><div class="col-sm-12 col-md-12 col-lg-3"><div class=sticky-sidebar><aside class=toc><h5>Table Of Contents</h5><div class=toc-content><nav id=TableOfContents></nav></div></aside><aside class=tags><h5>Tags</h5><ul class="tags-ul list-unstyled list-inline"><li class=list-inline-item><a href=https://jimbobbennett.dev/tags/xamarin target=_blank>xamarin</a></li><li class=list-inline-item><a href=https://jimbobbennett.dev/tags/xamarin.ios target=_blank>xamarin.ios</a></li><li class=list-inline-item><a href=https://jimbobbennett.dev/tags/technology target=_blank>Technology</a></li><li class=list-inline-item><a href=https://jimbobbennett.dev/tags/firewall target=_blank>firewall</a></li></ul></aside></div></div></div><div class=row><div class="col-sm-12 col-md-12 col-lg-9 p-4"><div id=disqus_thread></div><script>var disqus_config=function(){this.page.url="https://jimbobbennett.dev/blogs/firewall-issues-with-ios-simulators/",this.page.identifier="009bd327437e6455b780a91d205e572d"};(function(){if(window.location.hostname=="localhost")return;var e=document,t=e.createElement("script");t.src="https://jimbobbennett.disqus.com/embed.js",t.setAttribute("data-timestamp",+new Date),(e.head||e.body).appendChild(t)})()</script><noscript>Please enable JavaScript to view the <a href=https://disqus.com/?ref_noscript>comments powered by Disqus.</a></noscript></div></div></div><button class="p-2 px-3" onclick=topFunction() id=topScroll>
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