# Multiple DNS providers, the Perfect Gift this holiday Season

- **期号**: SRE Weekly Issue #50（2016-12-11）
- **作者**: —
- **链接**: https://blog.signifai.io/multiple-dns-providers-devops-prevent-ddos-attack/

## 简介

Signifai has this nice write-up about setting up redundant DNS providers. My favorite bit is how they polled major domains to see who had added a redundant provider since October 21, and they even shared the source for their polling tool!

## 正文

> ⚠️ 抓取失败：URLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1032)