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Avoid using if your DNS is slow, as it forces an immediate IP resolution for every single connection rule, adding massive overhead. Implement Local DNS Caching
One critical clue is when the exact same server configuration works flawlessly on a mobile client but fails on a desktop. This strongly suggests the issue is not with the server or network, but specifically with the client's interaction with the operating system. v2ray slow dns server
Once you understand these three failure modes, you can systematically diagnose and fix your specific problem.
If your provider supports it, enabling DoH can sometimes be more stable than raw DNS queries. Choose a server location, enter a username, and
Using a DNS server on another continent (e.g., user in Asia using 1.1.1.1 resolved in US) adds 200–400 ms RTT.
"address": "1.1.1.1", "domains": ["geosite:openai", "geosite:google"], "expectIPs": ["geoip:us"] This strongly suggests the issue is not with
user wants a comprehensive article about how slow DNS servers affect V2Ray performance. I need to cover the causes, consequences, and solutions. To do this effectively, I will conduct a series of searches to gather information from various sources. I will use both English and Chinese keywords to get a broad range of results. I'll start with foundational searches in English, followed by Chinese searches, and then look for configuration tips and benchmarks. search results have provided a variety of potential sources. I have identified several official documentation pages, troubleshooting guides, and optimization articles. To gather comprehensive information for the article, I will now open these promising links. opened pages provide a wealth of information. The official documentation explains V2Ray's DNS capabilities and limitations. The troubleshooting guide offers diagnostic steps. The optimization article covers DNS as part of network layer optimization. The v2rayA page details anti-pollution modes. The hostloc forum post mentions using https+local:// for faster resolution. I also have information on DNS leaks and performance impacts. Now I need to structure the article. I will plan the sections. I'll conduct further searches for specific configuration examples and performance benchmarks. search results have provided sufficient information for a comprehensive article. The user is likely a V2Ray user experiencing slow performance due to DNS issues. The article should be detailed and practical, covering the causes, consequences, and solutions. I will structure it with an introduction, sections on understanding DNS latency, causes, consequences, solutions, and troubleshooting. I will cite sources from the search results. Why Your V2Ray Is Sluggish: The Hidden Bottleneck of Slow DNS Servers
Many users configure V2Ray to use public resolvers like 8.8.8.8 (Google) or 1.1.1.1 (Cloudflare). These servers are fast globally, but some networks or censorship firewalls deliberately throttle or intercept traffic to these IPs. The result is artificially delayed or dropped DNS packets.
If V2Ray is forced to resolve domains through a slow, distant, or blocked upstream server, every single asset on a webpage (images, scripts, styles) waits for that slow resolution.
This suggests upstream DNS server issues or routing misconfiguration. Try alternative resolvers (8.8.8.8 vs 1.1.1.1 vs 223.5.5.5) and monitor if behavior changes.