{"id":2955,"date":"2026-04-04T14:57:32","date_gmt":"2026-04-04T14:57:32","guid":{"rendered":"https:\/\/www.ucartz.com\/blog\/?p=2955"},"modified":"2026-04-04T14:57:33","modified_gmt":"2026-04-04T14:57:33","slug":"n8n-nginx-ssl-setup-letsencrypt-vps","status":"publish","type":"post","link":"https:\/\/www.ucartz.com\/blog\/n8n-nginx-ssl-setup-letsencrypt-vps\/","title":{"rendered":"n8n Google OAuth Fails on VPS? Here&#8217;s the Exact Fix (IP, Domain, HTTPS, Nginx)"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">When you connect Google Sheets, Gmail, or any Google service inside n8n, the OAuth flow redirects back to your n8n instance using a callback URL. If that URL uses a raw IP address or plain HTTP, Google blocks it; no fallback, no partial access.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The rejected URL looks like this: http:\/\/&lt;vps-ip&gt;\/rest\/oauth2-credential\/callback<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Google enforces three strict rules on callback URLs:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The URL must use a public registered domain not a raw IP address.<\/li>\n\n\n\n<li>The URL must use HTTPS not plain HTTP.<\/li>\n\n\n\n<li>The domain must be publicly reachable with a valid SSL certificate.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A raw IP like &lt;vps-ip&gt; fails all three. Google treats it as an untrusted endpoint and blocks the redirect. The correct callback URL for a properly configured instance is:<\/p>\n\n\n\n<figure class=\"wp-block-embed\"><div class=\"wp-block-embed__wrapper\">\nhttps:\/\/binila.n8n.ucartz.com\/rest\/oauth2-credential\/callback\n<\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">To make that URL work, you need four things aligned: DNS pointing to your VPS, port 5678 open, correct n8n environment variables, and an Nginx reverse proxy handling HTTPS.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Diagnose Where Traffic Stops Before You Fix Anything<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Most failures come from one of three layers: the server (n8n not running), the network (firewall or DNS), or configuration (wrong environment variables). Test in this order to pinpoint the issue.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Test 1 &#8211; Does n8n respond on IP?<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Open this in your browser: http:\/\/&lt;vps-ip&gt;:5678<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If the n8n login screen loads, the container is running and the server is reachable. The problem is in DNS, Nginx, or config. If you get a timeout or connection refused, the container is down or port 5678 is blocked.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Test 2 &#8211; Does DNS resolve to your VPS?<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Run from your local terminal.I did like this:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ping binila.n8n.ucartz.com<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">The response must show &lt;vps-ip&gt;. If it shows a different IP or fails, your DNS A record is missing or wrong. Add this record in your DNS panel:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><strong>Field<\/strong><\/th><th><strong>Value<\/strong><\/th><\/tr><\/thead><tbody><tr><td>Type<\/td><td>A<\/td><\/tr><tr><td>Name<\/td><td>binila.n8n<\/td><\/tr><tr><td>Value<\/td><td>&lt;vps-ip&gt;<\/td><\/tr><tr><td>TTL<\/td><td>Auto or 300<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Wait 5\u201310 minutes, then run the ping again.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Test 3 &#8211; Is port 5678 open?<\/strong><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>ufw status<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">If 5678 is not listed as ALLOW, open it:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ufw allow 5678\nufw reload<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Cloud providers like Ucartz have their own firewall layer separate from UFW. Log into your VPS dashboard and add an inbound TCP rule for port 5678 from 0.0.0.0\/0. UFW alone is not enough.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Test 4 &#8211; Does the domain reach n8n with port?<\/strong><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>http:&#47;&#47;binila.n8n.ucartz.com:5678<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">If this loads n8n, DNS and firewall are correct. The only remaining step is Nginx + SSL to handle standard HTTPS traffic.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Set Correct n8n Environment Variables<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"http:\/\/n8n.io\" type=\"link\" id=\"n8n.io\" target=\"_blank\" rel=\"noreferrer noopener\">n8n  workflow automation<\/a> uses environment variables to generate webhook URLs and OAuth callback addresses. If these are wrong, every external integration Google, Stripe, Slack gets incorrect URLs.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">SSH into your server and go to your n8n directory:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ssh root@&lt;vps-ip&gt;\ncd \/opt\/n8n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Edit your <code><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-palette-color-1-color\">docker-compose.yml<\/mark><\/code> and update the environment section:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>environment:\n-N8N_HOST=binila.n8n.ucartz.com\n-N8N_PROTOCOL=https\n-WEBHOOK_URL=https:\/\/binila.n8n.ucartz.com\/\n-N8N_SECURE_COOKIE=true<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">The trailing slash on <code><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-palette-color-1-color\">WEBHOOK_URL<\/mark><\/code> is required. n8n appends <code><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-palette-color-1-color\">webhook\/id<\/mark><\/code> directly to this value. Without it, webhook URLs are malformed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Apply the changes:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>docker-compose down\ndocker-compose up -d<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Testing without HTTPS yet? <\/strong>Use N8N_PROTOCOL=http, WEBHOOK_URL=http:\/\/binila.n8n.ucartz.com:5678\/, and N8N_SECURE_COOKIE=false. This lets you access n8n via the domain temporarily. Google OAuth will still fail until HTTPS is live but it helps confirm DNS and proxy are working.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Install Nginx Reverse Proxy with SSL<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Nginx handles HTTPS termination and forwards traffic from port 443 to n8n on port 5678. Without this, your domain cannot serve HTTPS, and Google OAuth never works.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Install Nginx and Certbot<\/strong><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>apt update\napt install nginx certbot python3-certbot-nginx -y<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"665\" src=\"https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/04\/nginx-install-1024x665.webp\" alt=\"\" class=\"wp-image-2958\" srcset=\"https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/04\/nginx-install-1024x665.webp 1024w, https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/04\/nginx-install-300x195.webp 300w, https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/04\/nginx-install-768x499.webp 768w, https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/04\/nginx-install.webp 1496w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Create Nginx Config<\/strong><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>nano \/etc\/nginx\/sites-available\/n8n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Add this configuration:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>server {\nlisten 80;\nserver_name binila.n8n.ucartz.com;\nlocation \/ {\n    proxy_pass http:\/\/localhost:5678;\n    proxy_http_version 1.1;\n\n    proxy_set_header Upgrade $http_upgrade;\n    proxy_set_header Connection 'upgrade';\n\n    proxy_set_header Host $host;\n    proxy_cache_bypass $http_upgrade;\n\n    proxy_set_header X-Real-IP $remote_addr;\n    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;\n}}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Enable and Test Config<\/strong><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>ln -s \/etc\/nginx\/sites-available\/n8n \/etc\/nginx\/sites-enabled\/\nnginx -t\nsystemctl restart nginx<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"252\" src=\"https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/04\/system-restarty-1024x252.webp\" alt=\"system restart\" class=\"wp-image-2959\" srcset=\"https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/04\/system-restarty-1024x252.webp 1024w, https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/04\/system-restarty-300x74.webp 300w, https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/04\/system-restarty-768x189.webp 768w, https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/04\/system-restarty-1536x379.webp 1536w, https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/04\/system-restarty.webp 1870w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"554\" src=\"https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/04\/nginx-1024x554.webp\" alt=\"nginx\" class=\"wp-image-2960\" srcset=\"https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/04\/nginx-1024x554.webp 1024w, https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/04\/nginx-300x162.webp 300w, https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/04\/nginx-768x415.webp 768w, https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/04\/nginx-1536x831.webp 1536w, https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/04\/nginx.webp 1723w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Issue SSL Certificate<\/strong><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>certbot --nginx -d binila.n8n.ucartz.com<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Certbot prompts for your email and installs the certificate automatically. After it finishes, open your browser and go to:<\/p>\n\n\n\n<figure class=\"wp-block-embed\"><div class=\"wp-block-embed__wrapper\">\nhttps:\/\/binila.n8n.ucartz.com\n<\/div><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"824\" src=\"https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/04\/letsencrypt-1024x824.webp\" alt=\"\" class=\"wp-image-2961\" srcset=\"https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/04\/letsencrypt-1024x824.webp 1024w, https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/04\/letsencrypt-300x241.webp 300w, https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/04\/letsencrypt-768x618.webp 768w, https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/04\/letsencrypt.webp 1418w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">You should see the n8n login screen with a valid SSL padlock. If you do, Nginx and HTTPS are working.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Register the Callback URL in Google Cloud Console<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Google blocks any redirect URI that isn&#8217;t explicitly registered in your OAuth client settings. Even after HTTPS is live, the OAuth flow fails if the callback URL is not added.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Go to console.cloud.google.com \u2192 APIs &amp; Services \u2192 Credentials. Open your OAuth 2.0 Client ID and under Authorized redirect URIs add:<\/p>\n\n\n\n<figure class=\"wp-block-embed\"><div class=\"wp-block-embed__wrapper\">\nhttps:\/\/binila.n8n.ucartz.com\/rest\/oauth2-credential\/callback\n<\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Save, then go back to n8n and reconnect the Google credential. The OAuth consent screen should appear and complete without errors.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Final Verification Steps<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Step 1&nbsp; <\/strong><strong>&nbsp;&nbsp;Confirm n8n container is running<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>docker ps<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">The n8n container should show status Up. If missing, start it:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>cd \/opt\/n8n &amp;&amp; docker-compose up -d<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Step 2&nbsp; <\/strong><strong>&nbsp;&nbsp;Check logs for startup errors<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>docker logs n8n --tail=50<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Look for errors related to SSL, environment variables, or port conflicts. Fix those before testing OAuth.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Step 3&nbsp; <\/strong><strong>&nbsp;&nbsp;Test the full OAuth flow<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Open <code><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-palette-color-1-color\">https:\/\/binila.n8n.ucartz.com<\/mark><\/code>, log in, go to Credentials, and connect a Google service. The Google consent screen should appear. After you authorize, n8n saves the credential without errors.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"570\" src=\"https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/04\/sign-in-page-1024x570.webp\" alt=\"sign in page\" class=\"wp-image-2962\" srcset=\"https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/04\/sign-in-page-1024x570.webp 1024w, https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/04\/sign-in-page-300x167.webp 300w, https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/04\/sign-in-page-768x427.webp 768w, https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/04\/sign-in-page-1536x855.webp 1536w, https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/04\/sign-in-page.webp 1856w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\"><strong>Setup Comparison: What Works and What Does Not<\/strong><\/h1>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><strong>Setup<\/strong><\/th><th><strong>Result<\/strong><\/th><\/tr><\/thead><tbody><tr><td>Raw IP + HTTP &nbsp; http:\/\/&lt;vps-ip&gt;<\/td><td>Google blocks OAuth. Webhooks unreliable. Not for production.<\/td><\/tr><tr><td>Domain + HTTP + port &nbsp; http:\/\/domain:5678<\/td><td>Google still blocks OAuth. Use only for temporary testing.<\/td><\/tr><tr><td>Domain + HTTPS + Nginx &nbsp; https:\/\/domain.com<\/td><td>Google OAuth works. Webhooks work. Production-ready.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Only the third setup domain with HTTPS and Nginx works for Google OAuth and production webhooks. Do not run a live n8n instance on a raw IP.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Pre-Checklist Before Testing OAuth<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>http:\/\/&lt;vps-ip&gt;:5678 loads n8n<\/li>\n\n\n\n<li>DNS A record for binila.n8n.ucartz.com points to &lt;vps-ip&gt;<\/li>\n\n\n\n<li>Port 5678 open in UFW and VPS dashboard firewall<\/li>\n\n\n\n<li>N8N_HOST, N8N_PROTOCOL, and WEBHOOK_URL set correctly in docker-compose.yml<\/li>\n\n\n\n<li>Nginx installed, configured, and active<\/li>\n\n\n\n<li>SSL certificate issued by Certbot for the domain<\/li>\n\n\n\n<li>https:\/\/binila.n8n.ucartz.com opens with a valid padlock<\/li>\n\n\n\n<li>Callback URL registered in Google Cloud Console<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Keep n8n Running After Server Reboots<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Add restart: always to your docker-compose.yml so n8n starts automatically after every VPS reboot:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>services:\n n8n:\n     image: n8nio\/n8n\n     restart: always<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">With this in place, you never need to SSH in after a reboot. n8n comes back up on its own. If you ever restart manually, the two commands you need are:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>cd \/opt\/n8n\ndocker-compose up -d<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Google OAuth fails when you use a raw IP or plain HTTP. Fix it by setting the correct WEBHOOK_URL in n8n, pointing your domain DNS to your <a href=\"https:\/\/www.ucartz.com\/vps-hosting\">KVM VPS hosting<\/a> , installing Nginx with an SSL certificate, and registering the HTTPS callback URL in Google Cloud Console.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"> You\u2019ve now moved beyond a basic n8n setup into a system that actually works in real-world conditions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">By setting up a domain, configuring Nginx, and enabling HTTPS, you\u2019ve unlocked the parts of n8n that matter in production working OAuth integrations, reliable webhooks, and secure external access. Your workflows are no longer limited to local testing. They can now interact with APIs, trigger from external apps, and run as part of a live system.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">More importantly, you\u2019ve built the foundation most automation setups depend on. This isn\u2019t just about fixing a Google OAuth error. It\u2019s about making your automation stack stable, predictable, and usable at scale.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Start using this foundation to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Connect real services like Google Sheets, Slack, and CRMs<\/li>\n\n\n\n<li>Build end-to-end workflows (form \u2192 processing \u2192 notification)<\/li>\n\n\n\n<li>Add monitoring so failures don\u2019t go unnoticed<\/li>\n\n\n\n<li>Move toward production readiness with PostgreSQL and queue mode<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">At this stage, you\u2019re no longer experimenting with n8n. You\u2019re in a position to use it for actual systems whether that\u2019s internal automation, client projects, or infrastructure-level workflows.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>FAQ <\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>1. Why do I need Nginx for n8n?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nginx acts as a reverse proxy that allows you to access n8n via a domain without using a port. It also enables HTTPS, which is required for secure cookies, OAuth, and production use.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>2. Can I run n8n without SSL?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Yes, but only for local testing. Without HTTPS, features like Google OAuth, webhooks, and login sessions may not work properly.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>3. Why is my n8n domain not working without port 5678?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Because n8n runs on port 5678 by default. Without Nginx, your domain cannot route traffic to that port. A reverse proxy fixes this by forwarding requests internally.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>4. What does Let\u2019s Encrypt do in n8n setup?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/letsencrypt.org\/\" target=\"_blank\" rel=\"noreferrer noopener\">Let\u2019s Encrypt<\/a> provides free SSL certificates. It enables HTTPS, which is required for secure communication and integration with external services.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>5. Why is Google OAuth giving redirect URI errors in n8n?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Google does not accept IP-based URLs. You must use a valid domain with HTTPS. After setting up Nginx and SSL, OAuth will work correctly.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>When you connect Google Sheets, Gmail, or any Google service inside n8n, the OAuth flow redirects back to your n8n instance using a callback URL. If that URL uses a raw IP address or plain HTTP, Google blocks it; no fallback, no partial access. The rejected URL looks like this: http:\/\/&lt;vps-ip&gt;\/rest\/oauth2-credential\/callback Google enforces three strict [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":2957,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[712],"tags":[80,765,525,190],"class_list":["post-2955","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-n8n","tag-https","tag-lets-encrypt","tag-n8n","tag-nginx"],"blocksy_meta":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Why Your n8n Webhook Callback URL Fails on VPS<\/title>\n<meta name=\"description\" content=\"Set up HTTPS for n8n on a VPS using Nginx and Let\u2019s Encrypt. Step-by-step guide to fix webhooks, OAuth errors, and run n8n in production securely.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ucartz.com\/blog\/n8n-nginx-ssl-setup-letsencrypt-vps\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Why Your n8n Webhook Callback URL Fails on VPS\" \/>\n<meta property=\"og:description\" content=\"Set up HTTPS for n8n on a VPS using Nginx and Let\u2019s Encrypt. Step-by-step guide to fix webhooks, OAuth errors, and run n8n in production securely.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.ucartz.com\/blog\/n8n-nginx-ssl-setup-letsencrypt-vps\/\" \/>\n<meta property=\"og:site_name\" content=\"Web Hosting and IT Consultancy Services\" \/>\n<meta property=\"article:published_time\" content=\"2026-04-04T14:57:32+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-04-04T14:57:33+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/04\/ssl-nginx-https.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"2240\" \/>\n\t<meta property=\"og:image:height\" content=\"1260\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"Binila Treesa Babu\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Binila Treesa Babu\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"7 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/blog\\\/n8n-nginx-ssl-setup-letsencrypt-vps\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/blog\\\/n8n-nginx-ssl-setup-letsencrypt-vps\\\/\"},\"author\":{\"name\":\"Binila Treesa Babu\",\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/blog\\\/#\\\/schema\\\/person\\\/5a837c21b70e716682e217591bdb30f4\"},\"headline\":\"n8n Google OAuth Fails on VPS? Here&#8217;s the Exact Fix (IP, Domain, HTTPS, Nginx)\",\"datePublished\":\"2026-04-04T14:57:32+00:00\",\"dateModified\":\"2026-04-04T14:57:33+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/blog\\\/n8n-nginx-ssl-setup-letsencrypt-vps\\\/\"},\"wordCount\":1444,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/blog\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/blog\\\/n8n-nginx-ssl-setup-letsencrypt-vps\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.ucartz.com\\\/blog\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/ssl-nginx-https.webp\",\"keywords\":[\"HTTPS\",\"lets encrypt\",\"n8n\",\"Nginx\"],\"articleSection\":[\"n8n\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.ucartz.com\\\/blog\\\/n8n-nginx-ssl-setup-letsencrypt-vps\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/blog\\\/n8n-nginx-ssl-setup-letsencrypt-vps\\\/\",\"url\":\"https:\\\/\\\/www.ucartz.com\\\/blog\\\/n8n-nginx-ssl-setup-letsencrypt-vps\\\/\",\"name\":\"Why Your n8n Webhook Callback URL Fails on VPS\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/blog\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/blog\\\/n8n-nginx-ssl-setup-letsencrypt-vps\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/blog\\\/n8n-nginx-ssl-setup-letsencrypt-vps\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.ucartz.com\\\/blog\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/ssl-nginx-https.webp\",\"datePublished\":\"2026-04-04T14:57:32+00:00\",\"dateModified\":\"2026-04-04T14:57:33+00:00\",\"description\":\"Set up HTTPS for n8n on a VPS using Nginx and Let\u2019s Encrypt. Step-by-step guide to fix webhooks, OAuth errors, and run n8n in production securely.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/blog\\\/n8n-nginx-ssl-setup-letsencrypt-vps\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.ucartz.com\\\/blog\\\/n8n-nginx-ssl-setup-letsencrypt-vps\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/blog\\\/n8n-nginx-ssl-setup-letsencrypt-vps\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.ucartz.com\\\/blog\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/ssl-nginx-https.webp\",\"contentUrl\":\"https:\\\/\\\/www.ucartz.com\\\/blog\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/ssl-nginx-https.webp\",\"width\":2240,\"height\":1260,\"caption\":\"ssl nginx https\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/blog\\\/n8n-nginx-ssl-setup-letsencrypt-vps\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.ucartz.com\\\/blog\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"n8n Google OAuth Fails on VPS? Here&#8217;s the Exact Fix (IP, Domain, HTTPS, Nginx)\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/blog\\\/#website\",\"url\":\"https:\\\/\\\/www.ucartz.com\\\/blog\\\/\",\"name\":\"Web Hosting and IT Consultancy Services\",\"description\":\"Discover the Potential of Digital Transformation through Effortless Hosting and Professional IT Consulting!\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/blog\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.ucartz.com\\\/blog\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/blog\\\/#organization\",\"name\":\"Web Hosting and IT Consultancy Services\",\"url\":\"https:\\\/\\\/www.ucartz.com\\\/blog\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/blog\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/www.ucartz.com\\\/blog\\\/wp-content\\\/uploads\\\/2021\\\/08\\\/ucartzLogo-1.png\",\"contentUrl\":\"https:\\\/\\\/www.ucartz.com\\\/blog\\\/wp-content\\\/uploads\\\/2021\\\/08\\\/ucartzLogo-1.png\",\"width\":165,\"height\":50,\"caption\":\"Web Hosting and IT Consultancy Services\"},\"image\":{\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/blog\\\/#\\\/schema\\\/logo\\\/image\\\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/blog\\\/#\\\/schema\\\/person\\\/5a837c21b70e716682e217591bdb30f4\",\"name\":\"Binila Treesa Babu\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/8283a00d1a8cf6739945ebc2872a029483b43dcc2cc93f0a5abe491e114a7fa0?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/8283a00d1a8cf6739945ebc2872a029483b43dcc2cc93f0a5abe491e114a7fa0?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/8283a00d1a8cf6739945ebc2872a029483b43dcc2cc93f0a5abe491e114a7fa0?s=96&d=mm&r=g\",\"caption\":\"Binila Treesa Babu\"},\"description\":\"I am Binila Treesa Babu, a content writer specializing in dedicated servers, cloud hosting, and cybersecurity. I help businesses and developers choose the best hosting solutions by providing in-depth insights, reviews, and expert recommendations. Follow for expert tips and trends!\",\"url\":\"https:\\\/\\\/www.ucartz.com\\\/blog\\\/author\\\/binila-treesa-babu\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Why Your n8n Webhook Callback URL Fails on VPS","description":"Set up HTTPS for n8n on a VPS using Nginx and Let\u2019s Encrypt. Step-by-step guide to fix webhooks, OAuth errors, and run n8n in production securely.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.ucartz.com\/blog\/n8n-nginx-ssl-setup-letsencrypt-vps\/","og_locale":"en_US","og_type":"article","og_title":"Why Your n8n Webhook Callback URL Fails on VPS","og_description":"Set up HTTPS for n8n on a VPS using Nginx and Let\u2019s Encrypt. Step-by-step guide to fix webhooks, OAuth errors, and run n8n in production securely.","og_url":"https:\/\/www.ucartz.com\/blog\/n8n-nginx-ssl-setup-letsencrypt-vps\/","og_site_name":"Web Hosting and IT Consultancy Services","article_published_time":"2026-04-04T14:57:32+00:00","article_modified_time":"2026-04-04T14:57:33+00:00","og_image":[{"width":2240,"height":1260,"url":"https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/04\/ssl-nginx-https.webp","type":"image\/webp"}],"author":"Binila Treesa Babu","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Binila Treesa Babu","Est. reading time":"7 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.ucartz.com\/blog\/n8n-nginx-ssl-setup-letsencrypt-vps\/#article","isPartOf":{"@id":"https:\/\/www.ucartz.com\/blog\/n8n-nginx-ssl-setup-letsencrypt-vps\/"},"author":{"name":"Binila Treesa Babu","@id":"https:\/\/www.ucartz.com\/blog\/#\/schema\/person\/5a837c21b70e716682e217591bdb30f4"},"headline":"n8n Google OAuth Fails on VPS? Here&#8217;s the Exact Fix (IP, Domain, HTTPS, Nginx)","datePublished":"2026-04-04T14:57:32+00:00","dateModified":"2026-04-04T14:57:33+00:00","mainEntityOfPage":{"@id":"https:\/\/www.ucartz.com\/blog\/n8n-nginx-ssl-setup-letsencrypt-vps\/"},"wordCount":1444,"commentCount":0,"publisher":{"@id":"https:\/\/www.ucartz.com\/blog\/#organization"},"image":{"@id":"https:\/\/www.ucartz.com\/blog\/n8n-nginx-ssl-setup-letsencrypt-vps\/#primaryimage"},"thumbnailUrl":"https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/04\/ssl-nginx-https.webp","keywords":["HTTPS","lets encrypt","n8n","Nginx"],"articleSection":["n8n"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.ucartz.com\/blog\/n8n-nginx-ssl-setup-letsencrypt-vps\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.ucartz.com\/blog\/n8n-nginx-ssl-setup-letsencrypt-vps\/","url":"https:\/\/www.ucartz.com\/blog\/n8n-nginx-ssl-setup-letsencrypt-vps\/","name":"Why Your n8n Webhook Callback URL Fails on VPS","isPartOf":{"@id":"https:\/\/www.ucartz.com\/blog\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.ucartz.com\/blog\/n8n-nginx-ssl-setup-letsencrypt-vps\/#primaryimage"},"image":{"@id":"https:\/\/www.ucartz.com\/blog\/n8n-nginx-ssl-setup-letsencrypt-vps\/#primaryimage"},"thumbnailUrl":"https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/04\/ssl-nginx-https.webp","datePublished":"2026-04-04T14:57:32+00:00","dateModified":"2026-04-04T14:57:33+00:00","description":"Set up HTTPS for n8n on a VPS using Nginx and Let\u2019s Encrypt. Step-by-step guide to fix webhooks, OAuth errors, and run n8n in production securely.","breadcrumb":{"@id":"https:\/\/www.ucartz.com\/blog\/n8n-nginx-ssl-setup-letsencrypt-vps\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.ucartz.com\/blog\/n8n-nginx-ssl-setup-letsencrypt-vps\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.ucartz.com\/blog\/n8n-nginx-ssl-setup-letsencrypt-vps\/#primaryimage","url":"https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/04\/ssl-nginx-https.webp","contentUrl":"https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2026\/04\/ssl-nginx-https.webp","width":2240,"height":1260,"caption":"ssl nginx https"},{"@type":"BreadcrumbList","@id":"https:\/\/www.ucartz.com\/blog\/n8n-nginx-ssl-setup-letsencrypt-vps\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.ucartz.com\/blog\/"},{"@type":"ListItem","position":2,"name":"n8n Google OAuth Fails on VPS? Here&#8217;s the Exact Fix (IP, Domain, HTTPS, Nginx)"}]},{"@type":"WebSite","@id":"https:\/\/www.ucartz.com\/blog\/#website","url":"https:\/\/www.ucartz.com\/blog\/","name":"Web Hosting and IT Consultancy Services","description":"Discover the Potential of Digital Transformation through Effortless Hosting and Professional IT Consulting!","publisher":{"@id":"https:\/\/www.ucartz.com\/blog\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.ucartz.com\/blog\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.ucartz.com\/blog\/#organization","name":"Web Hosting and IT Consultancy Services","url":"https:\/\/www.ucartz.com\/blog\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.ucartz.com\/blog\/#\/schema\/logo\/image\/","url":"https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2021\/08\/ucartzLogo-1.png","contentUrl":"https:\/\/www.ucartz.com\/blog\/wp-content\/uploads\/2021\/08\/ucartzLogo-1.png","width":165,"height":50,"caption":"Web Hosting and IT Consultancy Services"},"image":{"@id":"https:\/\/www.ucartz.com\/blog\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/www.ucartz.com\/blog\/#\/schema\/person\/5a837c21b70e716682e217591bdb30f4","name":"Binila Treesa Babu","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/8283a00d1a8cf6739945ebc2872a029483b43dcc2cc93f0a5abe491e114a7fa0?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/8283a00d1a8cf6739945ebc2872a029483b43dcc2cc93f0a5abe491e114a7fa0?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/8283a00d1a8cf6739945ebc2872a029483b43dcc2cc93f0a5abe491e114a7fa0?s=96&d=mm&r=g","caption":"Binila Treesa Babu"},"description":"I am Binila Treesa Babu, a content writer specializing in dedicated servers, cloud hosting, and cybersecurity. I help businesses and developers choose the best hosting solutions by providing in-depth insights, reviews, and expert recommendations. Follow for expert tips and trends!","url":"https:\/\/www.ucartz.com\/blog\/author\/binila-treesa-babu\/"}]}},"_links":{"self":[{"href":"https:\/\/www.ucartz.com\/blog\/wp-json\/wp\/v2\/posts\/2955","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ucartz.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ucartz.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ucartz.com\/blog\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ucartz.com\/blog\/wp-json\/wp\/v2\/comments?post=2955"}],"version-history":[{"count":2,"href":"https:\/\/www.ucartz.com\/blog\/wp-json\/wp\/v2\/posts\/2955\/revisions"}],"predecessor-version":[{"id":2963,"href":"https:\/\/www.ucartz.com\/blog\/wp-json\/wp\/v2\/posts\/2955\/revisions\/2963"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ucartz.com\/blog\/wp-json\/wp\/v2\/media\/2957"}],"wp:attachment":[{"href":"https:\/\/www.ucartz.com\/blog\/wp-json\/wp\/v2\/media?parent=2955"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ucartz.com\/blog\/wp-json\/wp\/v2\/categories?post=2955"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ucartz.com\/blog\/wp-json\/wp\/v2\/tags?post=2955"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}