"log": "loglevel": "info", "access": "/var/log/v2ray/access.log", "error": "/var/log/v2ray/error.log" , "dns": "servers": [
This article explores exactly how DNS servers affect V2Ray performance, the common causes of DNS-related slowdowns, and step-by-step solutions to diagnose and fix the problem.
Running CoreDNS locally on your client machine or router, then pointing V2Ray's built-in DNS to localhost:53 , provides professional-grade DNS performance without sacrificing integration.
If you're running a router-based proxy or a transparent proxy for your entire network, review your domainStrategy setting: v2ray slow dns server
Route foreign queries through your proxy outbound.
queryStrategy controls whether V2Ray queries IPv4, IPv6, or both. If you request both ( UseIP ), but your IPv6 path is broken, the resolver will wait for an IPv6 timeout (~5–10 seconds) before falling back to IPv4.
"dns": "hosts": "domain:v2ray.com": "127.0.0.1" , "servers": [ "address": "1.1.1.1", "port": 53, "domains": [ "geosite:geolocation-!cn" ] , "address": "223.5.5.5", "port": 53, "domains": [ "geosite:cn" ], "expectIPs": [ "geoip:cn" ] , "localhost" ] Use code with caution. "log": "loglevel": "info", "access": "/var/log/v2ray/access
This ensures all DNS lookups are handled using simple, standard UDP queries. On the Advanced DNS Settings tab, ensure FakeIP is turned OFF to avoid another layer of complexity.
Paste the specific NS and Public Key you saved from the provider site.
Add this to your V2Ray config under "log" : queryStrategy controls whether V2Ray queries IPv4, IPv6, or
"address": "8.8.8.8", "port": 53, "domains": ["geosite:geolocation-!cn", "geosite:speedtest"] , "1.1.1.1", "localhost" ]
"address": "1.1.1.1"
Most users implement this using mobile apps like , v2rayNG , or ZiVPN . 1. Generate Your Server Credentials
When you're connected to V2Ray and web pages hang for several seconds before loading—or sometimes fail to load at all—it's easy to assume the proxy server itself is slow. Often, however, the real culprit sits silently between your device and every website you visit: .