because the DNS protocol is not designed for high-speed data transfer, resulting in significantly lower speeds and higher latency compared to standard VPN protocols. How to Set Up V2Ray Slow DNS
Standard DNS requests travel in plaintext. Your local ISP can intercept these requests, slow them down, or poison them, forcing V2Ray to retry connections multiple times.
9.9.9.9 (Focuses on security and malicious site blocking) High-Speed Local Options (For Direct/Bypassed Traffic) Alibaba DNS: 223.5.5.5 / 223.6.6.6 114DNS: 114.114.114.114 / 114.114.115.115 Summary Checklist for Maximum V2Ray Speed
The most fundamental fix is to explicitly configure the DNS section in your V2Ray configuration. Here's a recommended baseline configuration: v2ray slow dns server
"protocol": "freedom"
Below is an optimized, high-performance dns configuration block. It implements , directing local traffic to fast local servers and restricted traffic to secure, fast remote servers.
If your client configuration is perfect but speeds remain sluggish, the issue likely resides on your VPS VPS (Virtual Private Server). V2Ray servers must resolve the final destinations of your traffic quickly. Connect to your VPS via SSH. because the DNS protocol is not designed for
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.
If your system sends DNS queries outside the encrypted V2Ray tunnel, your local Internet Service Provider (ISP) intercepts them. This causes massive latency. In worst-case scenarios, a routing loop occurs: V2Ray tries to resolve a proxy endpoint using a DNS server that itself requires the proxy to resolve, causing the connection to time out. 2. High Round-Trip Time (RTT)
A slow DNS server can significantly impact the performance of your V2Ray connection. By choosing a fast and reliable DNS server, configuring V2Ray to use a local DNS server, and exploring DoH or DoT, you can optimize your V2Ray setup and enjoy a faster, more reliable connection. If your client configuration is perfect but speeds
Here's a production-ready DNS configuration that balances speed, reliability, and security:
Replace 127.0.0.1 with V2Ray’s inbound DNS address (if you configured a DNS inbound). Or simply test your browser: load 10 fresh domains and measure the initial delay.
In transparent proxy scenarios, DNS requests from clients are not automatically captured unless you manually apply iptables or nftables rules to redirect UDP port 53 traffic to a local DNS resolver like V2Ray's internal DNS.
] , "outbounds": [
This indicates a deadlock where V2Ray cannot reach its upstream DNS servers. The most common cause is the DNS request loop in TUN mode. The solution involves either simplifying DNS configuration to bypass V2Ray processing or creating specific routing rules to exempt DNS traffic from being captured.