{"slug":"out-of-sync","title":"Out of sync","tags":["tailscale"],"agent_summary":"Last validated: Jan 5, 2026","trigger_phrases":[],"runnable":false,"markdown":"\r\n# Out of sync\r\n\r\nLast validated: Jan 5, 2026\r\n\r\nThis topic explains a message that may appear in the Tailscale client and the actions you can take to address it. For a list of currently documented messages in the Tailscale admin console and client, refer to the main [Messages](https://tailscale.com/docs/reference/messages) topic.\r\n\r\n## [Message displayed in the client](https://tailscale.com/docs/reference/messages/client/not-in-map-poll\\#message-displayed-in-the-client)\r\n\r\n> Out of sync\r\n>\r\n> Unable to connect to the Tailscale coordination server to\r\n> synchronize the state of your tailnet. Peer reachability\r\n> might degrade over time.\r\n\r\n## [Reference ID](https://tailscale.com/docs/reference/messages/client/not-in-map-poll\\#reference-id)\r\n\r\n`not-in-map-poll`\r\n\r\n## [Why you're seeing this message](https://tailscale.com/docs/reference/messages/client/not-in-map-poll\\#why-youre-seeing-this-message)\r\n\r\nYour Tailscale client cannot connect to the coordination server that synchronizes devices and nodes (peers) across your tailnet.\r\n\r\nThis issue can occur for the following reasons:\r\n\r\n- Internet connectivity issues.\r\n\r\n- Firewall restrictions are blocking the connection to the Tailscale coordination server.\r\n\r\n- The Tailscale background service, which runs on devices and nodes, is not running correctly.\r\n\r\n- Device controls are preventing connectivity. This may include features such as Screen Time on Apple devices.\r\n\r\n\r\n## [What to do](https://tailscale.com/docs/reference/messages/client/not-in-map-poll\\#what-to-do)\r\n\r\nHere are some things you can try to resolve this issue:\r\n\r\n- Restart your Tailscale client using the client UI, or run the CLI commands `tailscale down` followed by `tailscale up`.\r\n- Check your internet connection.\r\n- Adjust or remove controls of devices that might prevent connectivity.\r\n- If you are using a firewall, verify that the ports and domains used for connecting to Tailscale are not blocked.\r\n\r\n## [Additional information](https://tailscale.com/docs/reference/messages/client/not-in-map-poll\\#additional-information)\r\n\r\n- For information about the ports and domain names used to communicate with Tailscale, refer to [What firewall ports should I open to use Tailscale?](https://tailscale.com/docs/reference/faq/firewall-ports).\r\n- For information about disabling Apple's Screen Time feature, refer to [macOS Screen Time and Tailscale](https://tailscale.com/docs/concepts/macos-webfilterproxyd).\r\n\r\n![Project Logo](https://cdn.brandfetch.io/tailscale.com/fallback/lettermark/theme/dark/h/256/w/256/icon?c=1bfwsmEH20zzEfSNTed)\r\n\r\nAsk AI\r\n\r\nreCAPTCHA\r\n\r\nRecaptcha requires verification.\r\n\r\nprotected by **reCAPTCHA**\r\n","html":"<h1>Out of sync</h1>\n<p>Last validated: Jan 5, 2026</p>\n<p>This topic explains a message that may appear in the Tailscale client and the actions you can take to address it. For a list of currently documented messages in the Tailscale admin console and client, refer to the main <a href=\"https://tailscale.com/docs/reference/messages\">Messages</a> topic.</p>\n<h2><a href=\"https://tailscale.com/docs/reference/messages/client/not-in-map-poll#message-displayed-in-the-client\">Message displayed in the client</a></h2>\n<blockquote>\n<p>Out of sync</p>\n<p>Unable to connect to the Tailscale coordination server to\r\nsynchronize the state of your tailnet. Peer reachability\r\nmight degrade over time.</p>\n</blockquote>\n<h2><a href=\"https://tailscale.com/docs/reference/messages/client/not-in-map-poll#reference-id\">Reference ID</a></h2>\n<p><code>not-in-map-poll</code></p>\n<h2><a href=\"https://tailscale.com/docs/reference/messages/client/not-in-map-poll#why-youre-seeing-this-message\">Why you're seeing this message</a></h2>\n<p>Your Tailscale client cannot connect to the coordination server that synchronizes devices and nodes (peers) across your tailnet.</p>\n<p>This issue can occur for the following reasons:</p>\n<ul>\n<li>\n<p>Internet connectivity issues.</p>\n</li>\n<li>\n<p>Firewall restrictions are blocking the connection to the Tailscale coordination server.</p>\n</li>\n<li>\n<p>The Tailscale background service, which runs on devices and nodes, is not running correctly.</p>\n</li>\n<li>\n<p>Device controls are preventing connectivity. This may include features such as Screen Time on Apple devices.</p>\n</li>\n</ul>\n<h2><a href=\"https://tailscale.com/docs/reference/messages/client/not-in-map-poll#what-to-do\">What to do</a></h2>\n<p>Here are some things you can try to resolve this issue:</p>\n<ul>\n<li>Restart your Tailscale client using the client UI, or run the CLI commands <code>tailscale down</code> followed by <code>tailscale up</code>.</li>\n<li>Check your internet connection.</li>\n<li>Adjust or remove controls of devices that might prevent connectivity.</li>\n<li>If you are using a firewall, verify that the ports and domains used for connecting to Tailscale are not blocked.</li>\n</ul>\n<h2><a href=\"https://tailscale.com/docs/reference/messages/client/not-in-map-poll#additional-information\">Additional information</a></h2>\n<ul>\n<li>For information about the ports and domain names used to communicate with Tailscale, refer to <a href=\"https://tailscale.com/docs/reference/faq/firewall-ports\">What firewall ports should I open to use Tailscale?</a>.</li>\n<li>For information about disabling Apple's Screen Time feature, refer to <a href=\"https://tailscale.com/docs/concepts/macos-webfilterproxyd\">macOS Screen Time and Tailscale</a>.</li>\n</ul>\n<p><img src=\"https://cdn.brandfetch.io/tailscale.com/fallback/lettermark/theme/dark/h/256/w/256/icon?c=1bfwsmEH20zzEfSNTed\" alt=\"Project Logo\"></p>\n<p>Ask AI</p>\n<p>reCAPTCHA</p>\n<p>Recaptcha requires verification.</p>\n<p>protected by <strong>reCAPTCHA</strong></p>\n"}