nginx upstream proxy_pass 問題

Question

請教以下配置有什麼不同？

upstream baidu_server {
    server 180.149.132.47:80;
}
server {
    listen 80;
    server_name  xxx.example.com;
    charset utf-8;
    access_log off;

    location / {
        proxy_redirect off;
        proxy_pass http://baidu_server;
        proxy_set_header User-Agent $http_user_agent;
        proxy_set_header Accept-Encoding "";
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }

server {
    listen 80;
    server_name  xxx.example.com;
    charset utf-8;
    access_log off;

    location / {
        proxy_redirect off;
        proxy_pass http://180.149.132.47:80;
        proxy_set_header User-Agent $http_user_agent;
        proxy_set_header Accept-Encoding "";
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }

第二種可以正確跳到百度首頁，第一種卻不行，請問是為什麼？

Answer 1

百度伺服器拒絕，你可以讓設定其他的測試下

Answer 2

兩種都可以。

Answer 3

樓主，我也遇到這個問題，求答案或解決方案，第一種URL直接就變成http://baidu_server了