工单节点使用指南 请用平和的语言准确描述你所遇到的问题 厂商的技术支持和你一样也是有喜怒哀乐的普通人类，尊重是相互的 如果是关于 V2EX 本身的问题反馈，请使用 反馈 节点
这是一个创建于 1552 天前的主题，其中的信息可能已经有所发展或是发生改变。
上游的服务不提供响应了，官方测试例子的结果：
curl -v -H 'accept: application/dns-json' 'https://rubyfish.cn/dns-query?name=www.google.com&type=A' * Trying 118.126.68.223:443... * Connected to rubyfish.cn (118.126.68.223) port 443 (#0) * ALPN, offering h2 * ALPN, offering http/1.1 * successfully set certificate verify locations: * CAfile: /etc/ssl/certs/ca-certificates.crt * CApath: /etc/ssl/certs * TLSv1.3 (OUT), TLS handshake, Client hello (1): * TLSv1.3 (IN), TLS handshake, Server hello (2): * TLSv1.2 (IN), TLS handshake, Certificate (11): * TLSv1.2 (IN), TLS handshake, Server key exchange (12): * TLSv1.2 (IN), TLS handshake, Server finished (14): * TLSv1.2 (OUT), TLS handshake, Client key exchange (16): * TLSv1.2 (OUT), TLS change cipher, Change cipher spec (1): * TLSv1.2 (OUT), TLS handshake, Finished (20): * TLSv1.2 (IN), TLS handshake, Finished (20): * SSL connection using TLSv1.2 / ECDHE-RSA-AES128-GCM-SHA256 * ALPN, server accepted to use h2 * Server certificate: * subject: CN=dns.rubyfish.cn * start date: Oct 8 01:24:24 2021 GMT * expire date: Jan 6 01:24:23 2022 GMT * subjectAltName: host "rubyfish.cn" matched cert's "rubyfish.cn" * issuer: C=US; O=Let's Encrypt; CN=R3 * SSL certificate verify ok. * Using HTTP2, server supports multi-use * Connection state changed (HTTP/2 confirmed) * Copying HTTP/2 data in stream buffer to connection buffer after upgrade: len=0 * Using Stream ID: 1 (easy handle 0x5626e69f0570) > GET /dns-query?name=www.google.com&type=A HTTP/2 > Host: rubyfish.cn > user-agent: curl/7.74.0 > accept: application/dns-json > * Connection state changed (MAX_CONCURRENT_STREAMS == 128)! < HTTP/2 503 < date: Tue, 26 Oct 2021 09:53:33 GMT < content-type: application/json; charset= < content-length: 116 < server: nginx/1.14.0 (Ubuntu) < access-control-allow-headers: Content-Type < access-control-allow-methods: GET, HEAD, OPTIONS, POST < access-control-allow-origin: * < access-control-max-age: 3600 < x-powered-by: DNS-over-HTTPS/2.2.2 (+https://github.com/m13253/dns-over-https) < * Connection #0 to host rubyfish.cn left intact {"Status":2,"Comment":"DNS query failure (read udp 127.0.0.1:50398-\u003e127.0.0.1:5003: read: connection refused)"} 
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