--- title: Axis, EPMD, and You | daily.dev description: A detailed account of deploying an Elixir Phoenix application for DEF CON CTF finals, focusing on challenges with the Erlang Port Mapper Daemon (EPMD). The... canonical: https://daily.dev/posts/axis-epmd-and-you-p3pydhijx twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Axis, EPMD, and You | daily.dev og:description: A detailed account of deploying an Elixir Phoenix application for DEF CON CTF finals, focusing on challenges with the Erlang Port Mapper Daemon (EPMD). The... og:url: https://daily.dev/posts/axis-epmd-and-you-p3pydhijx og:image: https://api.daily.dev/og/posts/p3PyDHiJx.png og:image:alt: Axis, EPMD, and You og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Axis, EPMD, and You **[Awesome Elixir](https://daily.dev/sources/awelix)** · 7 min read · 1 upvotes · 0 comments ## Summary A detailed account of deploying an Elixir Phoenix application for DEF CON CTF finals, focusing on challenges with the Erlang Port Mapper Daemon (EPMD). The author explains Erlang's distributed computing architecture, container deployment issues with krun virtualization, and the specific networking problems that prevented the application from starting. The solution involved disabling distributed Erlang functionality using the --dist_listen false flag to bypass EPMD's port binding requirements. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Don’t just attend KubeCon \+ CloudNativeCon, Merge Forward your experience\!](https://daily.dev/posts/don-t-just-attend-kubecon-cloudnativecon-merge-forward-your-experience--l0rpp73x8) · CNCF · 1 upvotes · 0 comments - [Announcing H2 2026 KCDs](https://daily.dev/posts/announcing-h2-2026-kcds-m96goajm1) · CNCF · 1 upvotes · 0 comments - [Two months of Open Community Groups](https://daily.dev/posts/two-months-of-open-community-groups-asf52zhbs) · CNCF · 0 upvotes · 0 comments --- Tags: [#cyber](https://daily.dev/tags/cyber), [#docker](https://daily.dev/tags/docker), [#elixir](https://daily.dev/tags/elixir), [#erlang](https://daily.dev/tags/erlang) [View this post on daily.dev](https://daily.dev/posts/axis-epmd-and-you-p3pydhijx) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Axis, EPMD, and You","url":"https://daily.dev/posts/axis-epmd-and-you-p3pydhijx","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/axis-epmd-and-you-p3pydhijx"},"datePublished":"2025-09-04T20:22:18.324Z","dateModified":"2025-09-04T20:22:39.993Z","description":"A detailed account of deploying an Elixir Phoenix application for DEF CON CTF finals, focusing on challenges with the Erlang Port Mapper Daemon (EPMD). 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