Choose a common host or paste a URL. Inspect DNS, security signals and next steps.
選常用網域或貼上網址，查看 DNS、安全訊號與下一步。
Open this link on the affected computer. Press Start, then Share result image to send the results back. Opening the link does not start the checks.
在有問題的電腦開啟此連結，按「開始檢查」，完成後按「分享結果圖片」傳回。開啟連結不會自動執行檢查。
| Check path檢查路徑 | Result結果 | ms |
|---|
Browser requests use this device's current network. Proxy DNS uses our edge. A cross-origin response does not prove the full Google page works, and a failed request cannot identify DNS, TLS, proxy or firewall errors by itself. The summary excludes your IP and VPN configuration; it is copied only when you choose.
瀏覽器請求使用這台裝置目前的網路；代理 DNS 則由本站邊緣解析。跨來源回應不代表完整 Google 頁面可用，失敗也無法單獨區分 DNS、TLS、代理或防火牆問題。摘要不含你的 IP 或 VPN 設定，需自行選擇複製。
Cache-Control: private, no-store). IP is masked by default for screenshot safety.private, no-store 阻絕跨站讀取）。IP 預設打碼，方便安心截圖分享。Short answer: it won't raise your speed cap — but it isn't nothing. Here's the real split, without the marketing.
簡短答案：它絕對不會提高你的頻寬上限 —— 但也並非完全沒用。跳出都市傳說，這是底層網路協定真正的分工邊界：
Why this happens: Before a single byte downloads, your device asks DNS for the CDN's IP address. If your ISP's resolver times out or lacks EDNS Client Subnet / local peering, the CDN hands you an overseas mirror. Switching resolvers can immediately point you to a closer edge server.
Test No-ECS vs. ECS resolvers (1.1.1.1, 8.8.8.8, 9.9.9.11, 208.67.222.222) and compare their answers; test actual download performance on your device.
Leave it on Automatic on modern consoles. Manual MTU tweaks are mostly cargo-cult.
Let it download in rest mode — consoles give downloads more resources when nothing else runs.
Ethernet over Wi-Fi, and download off-peak — CDN and ISP congestion is often the real cap.
用上方評選工具實測 No-ECS 與 ECS 解析器（1.1.1.1、8.8.8.8、9.9.9.11、208.67.222.222），比較解析結果，並在原設備驗證實際下載效果。
在現代主機上請維持 自動（Automatic / 1500）。手動改小 MTU 多半是犧牲封包效率的都市傳說。
關閉背景遊戲並進入待機模式（Rest Mode）下載 —— 主機在背景有遊戲執行時，會主動限制網路佇列與 CPU 資源。
用 實體網路線（Ethernet）取代隔牆 Wi-Fi，並避開晚間尖峰 —— 多數時候真正的上限是無線重傳與 ISP 互連塞車。
Our 6 built-in security resolvers and one-click custom DoH presets evaluate domains against the most trusted open-source DNS blocklists and threat intelligence feeds — synced upstream every 5 to 60 minutes with zero local query logging.
本站內建的 6 大資安防毒 DNS 與上方一鍵自訂 DoH 按鈕，底層整合了全球社群最權威的開源防護清單與威脅情資庫（上游每 5～60 分鐘自動更新，本站零查詢留存），你也可以直接點選加入實測或設定於路由器／AdGuard Home／Pi-hole：
Open-source threat intelligence feed (github.com/hagezi/dns-blocklists) blocking malware, phishing, scam, C2 botnets, and newly registered malicious domains.
GitHub 指標性開源防護庫（hagezi/dns-blocklists），涵蓋 TIF 威脅情資、釣魚詐騙、殭屍網路 C2 與惡意軟體散佈網域，誤殺率極低。
Community-curated blocklist (oisd.nl) engineered so "it works without breaking websites" — blocks phishing, malware, spyware, and intrusive trackers.
以「零誤殺、不破壞正常網站與遊戲連線」聞名的社群開源規則集（oisd.nl），攔截釣魚、惡意程式、加密貨幣詐騙與背景追蹤器。
Swiss non-profit threat feeds (URLhaus, ThreatFox, Feodo Tracker) tracking active malware payloads, ransomware distribution, and botnet command-and-control hosts.
瑞士非營利資安計畫（URLhaus、ThreatFox、Feodo Tracker），每 5～15 分鐘更新活躍惡意載荷、勒索軟體中繼站與木馬 C2 伺服器清單。
Open-source AdGuardSDNSFilter and phishing blocklists combining AdGuard Base, EasyList, and community anti-scam rules.
開源 AdGuardSDNSFilter 專案，整合 EasyList、惡意廣告與假冒登入頁攔截規則，廣泛用於 AdGuard Home 與公共防毒 DNS。
Aggregated open-source credential-phishing lists (phishing.army, OpenPhish, PhishTank, Spamhaus DBL) targeting fake banking, wallet, and login domains.
聚合 phishing.army、OpenPhish、PhishTank 等開源反釣魚情資，專責攔截假冒銀行、遊戲帳號盜取、電商與加密錢包釣魚網域。
Classic open-source unified hosts (StevenBlack/hosts, badmojr/1Hosts) and RethinkDNS Sky aggregator with 190+ selectable open blocklists.
經典開源 StevenBlack/hosts、badmojr/1Hosts 與 RethinkDNS Sky 開源規則聚合器，支援嚴格隱私與反遙測過濾。
Born from a free, public-good DNS (34.80.2.188 · DoT ns.dnsviewer.org) that was kept running for years — just to help people whose downloads were too slow, right when they'd bought a game and wanted to play. Same spirit here: a clean tool that tells you the truth and asks nothing back.
源自當年默默維護多年的一座免費公益 DNS（34.80.2.188 · 私人 DNS ns.dnsviewer.org）—— 初衷只是為了幫那些剛買了遊戲、下班只想好好玩一場，卻被下載速度卡住的玩家。這裡延續同樣的精神：給你一把乾淨的工具、講真話，而且不向你索取任何東西。