The site will generate a "Slow DNS Config" text block containing your NS (Name Server) Public Key 4. Application-Specific Drafts HTTP Custom: You often import a
Using distant or heavily throttled upstream DNS servers.
If modifying the raw JSON configuration feels daunting, you can fix slow DNS issues directly within your V2Ray client application (such as v2rayN, v2rayNG, or Nekoray). Optimize Sniffing Settings
Ensure DNS traffic is handled correctly to avoid routing loops. Traffic bound for your DNS servers should bypass or enter the proxy tunnel intentionally.
Here’s a production-ready config.json snippet that balances speed, privacy, and reliability. v2ray slow dns server
V2Ray caches by default but you can adjust TTL:
Standard UDP DNS (Port 53) is easily intercepted and throttled. Upgrading your configuration to use or DNS over TLS (DoT) ensures that your queries are encrypted and cannot be slowed down by local network censorship. Use https://1.1.1 (Cloudflare DoH) Use https://dns.google (Google DoH) 3. Enable DNS Caching
If step #4 takes 500ms, your entire browsing session feels like dial-up.
A V2Ray slow DNS server is a powerful last resort for bypassing severe network censorship. While it will never match the speed of direct TCP or HTTP/2 connections, proper configuration—specifically optimizing MTU, selecting closer servers, and using fast resolvers—can make the experience quite usable for browsing and messaging. The site will generate a "Slow DNS Config"
"dns": "hosts": "domain:google.com": "8.8.8.8", // Direct IP for critical domains "domain:youtube.com": "1.1.1.1" , "servers": [ "1.1.1.1", "8.8.8.8", "localhost" ], "timeout": 5 // Increase from default 2 seconds
V2Fly's official documentation explicitly notes that . Using TCP-based DNS (as opposed to the standard UDP-based DNS) introduces additional connection setup overhead that can degrade performance, especially for high volumes of queries.
Standard V2Ray connections typically use protocols like VMess or VLESS over TCP or WebSocket. However, many firewalls can detect and block these. A "Slow DNS" setup encapsulates these V2Ray packets within DNS queries.
When DNS resolution fails or times out for specific domains, parts of a webpage may fail to load entirely. Images, scripts, or stylesheets hosted on slow-resolving domains won't appear, resulting in broken pages. Streaming services may fail selectively or buffer excessively. Optimize Sniffing Settings Ensure DNS traffic is handled
], "routing": "rules": [
Open your configuration file and locate or create the "dns" block. You need to define both local and international DNS servers, and use tag identifiers to route them properly.
The impact of slow DNS resolution extends far beyond marginally longer page loads. Here are the most common symptoms users experience: