Dns Server - V2ray Slow

By following these steps and tips, you can potentially resolve issues related to slow DNS servers on V2Ray and improve your overall experience with the platform.

"protocol": "dns", "tag": "dns-out"

Use benchmarking tools like DNSBench or Namebench to see how your current DNS servers perform.

Your ISP can see every website you are trying to visit, even if the actual data is encrypted.

If you're using TUN mode, watch for the "deadlock" scenario mentioned earlier. If you see log lines like accepted udp:8.8.8.8:53 [socks -> proxy] , it's a strong indicator that your DNS requests are being looped back into the proxy tunnel. v2ray slow dns server

"address": "1.1.1.1", "domains": ["geosite:openai", "geosite:google"], "expectIPs": ["geoip:us"]

Domestic domains ( geosite:cn or local equivalents) bypass the proxy and resolve instantly via ultra-fast local servers (like 114.114.114.114 ). Foreign or blocked domains are routed safely through the proxy to fast global DNS providers (Cloudflare/Google).

Log into your server via SSH and check /etc/resolv.conf . If it points to a slow default ISP DNS, change it to high-performance alternatives like Cloudflare ( 1.1.1.1 ) or Google ( 8.8.8.8 ).

If your V2Ray server's time is off by more than 30 seconds, TLS handshakes fail silently. The TLS retry mechanism forces a DNS re-query. You end up querying DNS 4-5 times to establish one connection. By following these steps and tips, you can

Any domain outside your local country ( geosite:geolocation-!cn ) queries Cloudflare's secure DoH server instantly.

# UDP latency dig @1.1.1.1 google.com +timeout=2

time nslookup google.com 8.8.8.8

1.1.1.1 or 1.0.0.1 (Fastest global response times). If you're using TUN mode, watch for the

Ensure your config.json has a dedicated dns object. This allows V2Ray to resolve domains internally rather than relying on the operating system, which is often slower when a proxy is active. ⚖️ Pros & Cons of Third-Party DNS in V2Ray Speed Resolvers like Cloudflare are built for low latency. Third-party servers can still experience rare outages. Privacy Prevents DNS leaking to your local ISP. You must trust the privacy policy of the DNS provider. Customization

Any local domain ( geosite:cn ) bypasses the proxy entirely, querying a fast domestic DoH server (like Alibaba DNS at 223.5.5.5 ).

The most effective way to eliminate latency is to implement a . This routes domestic domain queries to fast local servers, while sending blocked or international queries to secure, remote DNS servers over the proxy routing protocol.

Use a network analysis tool or your browser’s Developer Tools (Network Tab). Look at the DNS Lookup time. If it exceeds 50–100ms, your DNS configuration needs optimization. Step 2: Optimize Your V2Ray Client DNS Configuration

When V2Ray struggles with DNS resolution, your entire connection suffers. Every website you visit requires a DNS lookup; if that lookup takes hundreds of milliseconds, your fast connection feels like dial-up. Why a Slow DNS Server Ruins Your V2Ray Speed