我系统里不支持 ipv6，怎么看上去是在连 ipv6?（还没有发现别的网站有这问题）
```sh
$ curl -vvv '
https://wanqu.co/'* Trying 104.28.0.118...
* TCP_NODELAY set
* Trying 2400:cb00:2048:1::681c:76...
* TCP_NODELAY set
* Immediate connect fail for 2400:cb00:2048:1::681c:76: Network is unreachable
* Trying 2400:cb00:2048:1::681c:176...
* TCP_NODELAY set
* Immediate connect fail for 2400:cb00:2048:1::681c:176: Network is unreachable
* Trying 2400:cb00:2048:1::681c:76...
* TCP_NODELAY set
* Immediate connect fail for 2400:cb00:2048:1::681c:76: Network is unreachable
* Trying 2400:cb00:2048:1::681c:176...
* TCP_NODELAY set
* Immediate connect fail for 2400:cb00:2048:1::681c:176: Network is unreachable
* Trying 2400:cb00:2048:1::681c:76...
* TCP_NODELAY set
* Immediate connect fail for 2400:cb00:2048:1::681c:76: Network is unreachable
* Trying 2400:cb00:2048:1::681c:176...
```
这是一个专为移动设备优化的页面（即为了让你能够在 Google 搜索结果里秒开这个页面），如果你希望参与 V2EX 社区的讨论，你可以继续到 V2EX 上打开本讨论主题的完整版本。
https://www.v2ex.com/t/464184
V2EX 是创意工作者们的社区，是一个分享自己正在做的有趣事物、交流想法，可以遇见新朋友甚至新机会的地方。
V2EX is a community of developers, designers and creative people.