{"slug":"troubleshoot-subnet-connectivity-in-the-cloud","title":"Troubleshoot subnet connectivity in the cloud","tags":["tailscale","routing"],"agent_summary":"Last validated: Mar 20, 2026","trigger_phrases":[],"runnable":false,"markdown":"\r\n# Troubleshoot subnet connectivity in the cloud\r\n\r\nLast validated: Mar 20, 2026\r\n\r\nThe most common issue in Amazon Web Services, Microsoft Azure, and Google Cloud Platform that we've seen is a security group being too restrictive, and blocking connections. For troubleshooting purposes, try setting the internal security group to allow all traffic on the subnet, and the security group on the subnet router itself to allow all traffic to test if that unblocks connections.\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>Troubleshoot subnet connectivity in the cloud</h1>\n<p>Last validated: Mar 20, 2026</p>\n<p>The most common issue in Amazon Web Services, Microsoft Azure, and Google Cloud Platform that we've seen is a security group being too restrictive, and blocking connections. For troubleshooting purposes, try setting the internal security group to allow all traffic on the subnet, and the security group on the subnet router itself to allow all traffic to test if that unblocks connections.</p>\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"}