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Dns Server: V2ray Slow

If you want the absolute fastest V2Ray DNS experience, here is a production-tested configuration used by high-performance proxy operators.

Step 1: Install coredns (Modern alternative to Dnsmasq) CoreDNS is faster and natively supports DoH, gRPC, and caching. ./Corefile:

.:5353 
    bind 127.0.0.1
    cache 10000
    forward . tls://1.1.1.1 tls://9.9.9.9 
        max_concurrent 1000
        prefer_udp false

Step 2: V2Ray Config (Xray Core)


  "dns": 
    "hosts": 
      "domain:v2ray.com": "127.0.0.1",
      "domain:localhost": "127.0.0.1"
    ,
    "servers": [
      "127.0.0.1:5353",
"address": "1.1.1.1",
        "domains": ["geosite:openai", "geosite:google"],
        "expectIPs": ["geoip:us"]
],
    "clientIp": "198.18.0.1",
    "queryStrategy": "UseIPv4",
    "disableCache": false,
    "disableFallback": false

What this does:

If no explicit DNS config is provided, V2Ray defaults to the system’s DNS resolver (via Go’s net.Resolver). This is often slow due to: v2ray slow dns server

  • Enable 127.0.0.1:5353 local DNS if you run dnsmasq/Unbound.

    • Using default DNS like 8.8.8.8 from a country far away (or blocked/throttled by ISPs) adds 150–300ms per query.

    sudo tcpdump -i any port 53 -nn -tttt

    Now for the solutions. You need to configure V2Ray's internal DNS object. Forget your OS’s /etc/resolv.conf. V2Ray has its own DNS cache and resolver.

    Run tcpdump -i any port 53 while browsing. Observe: If you want the absolute fastest V2Ray DNS

    If V2Ray forwards DNS via DoH outbound proxy:

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