上游解析为 IPv6 时 Nginx 连接失败

Question

我在 nginx 中配置了对 google-analytics.com 执行 proxy_pass 的配置。但是正如您所知，google-analytics 解析为 ipv4，有时解析为 ipv6，当它确实解析为 ipv6 时，nginx 因此错误而失败。
connect() to [2a00:xxx:xxx:809::xxx]:443 连接到上游时失败(101:网络无法访问)。 (我只是混淆了上游的真实ip)
连接上游时上游服务器暂时禁用
为什么proxy_pass 中上游的nginx 失败解析为ipv6？

server {
     server_name upstream.nmmapper.com;
     location /.well-known/acme-challenge/ {
        allow all;
        root /var/www/letsencrypt;
        try_files $uri =404;
        break;
     }
}
location = /analytics.js {
        proxy_set_header Accept-Encoding "";
        proxy_pass https://www.google-analytics.com/analytics.js;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Host $server_name;
    }

Answer 1

尝试添加 ipv6 listen [::]:80指示:

server {
  listen 80;
  listen [::]:80; 
  server_name upstream.nmmapper.com;
  ...
}

对于 SSL:

listen 443 ssl;
listen [::]:443 ssl;