https://hex-go.github.io/tags/dns/Recent content in DNS on Hex BlogHugo -- gohugo.iozhhex-py@gmail.com (Hex)hex-py@gmail.com (Hex)©2026, All Rights ReservedThu, 21 Jan 2021 10:02:19 +0000https://hex-go.github.io/posts/kubernetes/2021-01-21-%E6%95%85%E9%9A%9C%E6%8E%92%E6%9F%A5--externaldns%E5%8F%AA%E5%BC%80%E6%94%BEudp53%E4%B8%8D%E5%BC%80%E6%94%BEtcp53%E5%AF%BC%E8%87%B4%E7%BD%91%E7%BB%9C%E8%B6%85%E6%97%B6/Thu, 21 Jan 2021 10:02:19 +0000hex-py@gmail.com (Hex)Thu, 21 Jan 2021 10:02:19 +0000https://hex-go.github.io/posts/kubernetes/2021-01-21-%E6%95%85%E9%9A%9C%E6%8E%92%E6%9F%A5--externaldns%E5%8F%AA%E5%BC%80%E6%94%BEudp53%E4%B8%8D%E5%BC%80%E6%94%BEtcp53%E5%AF%BC%E8%87%B4%E7%BD%91%E7%BB%9C%E8%B6%85%E6%97%B6/重要 DNS 协议在响应包超过 512 字节时，会自动切换到 TCP 传输。如果 DNS Server 只开放 UDP 53 端口，部分解析请求会被截断，客户端重试 TCP 超时后才会 fallback。 环HexKubernetesDNS故障排查Kubernetes