. This method is typically used when other ports are blocked, but it is inherently slower than standard VMess or VLESS protocols because it wraps data within DNS queries. 1. Understanding "Slow DNS" in V2Ray In this context,
3. The "DNS Outside Tunnel" Leak
A common rookie mistake in config.json is setting the DNS servers (like 8.8.8.8 or 1.1.1.1) to be queried directly, rather than through the proxy.
3.2 Caching Inefficiency
V2Ray’s internal DNS cache respects TTL values. Misconfigured or slow DNS servers returning very short TTLs (e.g., 30 seconds) force frequent lookups. For high-traffic scenarios, this multiplies delays.
5.4 Recursive Resolution Chains
V2Ray using a public DNS that itself queries slow authoritative servers (e.g., .tk, .ml domains often have slow NS records).
Recommendations
- Replace
"your_client_id" with a generated UUID (you can use uuidgen command to generate one).
- Replace
"your@email.com" with your email address.
- Replace
"your_server_domain" with your actual domain.
],
"clientIp": "198.18.0.1",
"queryStrategy": "UseIPv4",
"disableCache": false,
"disableFallback": false
Hardcode IPs for frequently accessed domains using the hosts field to bypass DNS entirely.
- With proxy ON: Load a webpage and count the seconds before content appears.
- Test DNS specifically: Use
nslookup google.com 8.8.8.8 while connected to V2Ray. A reply taking >200ms indicates a DNS bottleneck.
- Compare: If a direct
ping to your V2Ray server is 50ms but a DNS lookup takes 1000ms, the problem is DNS, not bandwidth.
V2ray Slow Dns Server May 2026
. This method is typically used when other ports are blocked, but it is inherently slower than standard VMess or VLESS protocols because it wraps data within DNS queries. 1. Understanding "Slow DNS" in V2Ray In this context,
3. The "DNS Outside Tunnel" Leak
A common rookie mistake in config.json is setting the DNS servers (like 8.8.8.8 or 1.1.1.1) to be queried directly, rather than through the proxy. v2ray slow dns server
3.2 Caching Inefficiency
V2Ray’s internal DNS cache respects TTL values. Misconfigured or slow DNS servers returning very short TTLs (e.g., 30 seconds) force frequent lookups. For high-traffic scenarios, this multiplies delays. Replace "your_client_id" with a generated UUID (you can
5.4 Recursive Resolution Chains
V2Ray using a public DNS that itself queries slow authoritative servers (e.g., .tk, .ml domains often have slow NS records). ],
"clientIp": "198
Recommendations
- Replace
"your_client_id" with a generated UUID (you can use uuidgen command to generate one).
- Replace
"your@email.com" with your email address.
- Replace
"your_server_domain" with your actual domain.
],
"clientIp": "198.18.0.1",
"queryStrategy": "UseIPv4",
"disableCache": false,
"disableFallback": false
Hardcode IPs for frequently accessed domains using the hosts field to bypass DNS entirely.
- With proxy ON: Load a webpage and count the seconds before content appears.
- Test DNS specifically: Use
nslookup google.com 8.8.8.8 while connected to V2Ray. A reply taking >200ms indicates a DNS bottleneck.
- Compare: If a direct
ping to your V2Ray server is 50ms but a DNS lookup takes 1000ms, the problem is DNS, not bandwidth.