1、编辑配置文件

vim /usr/local/nginx/conf/vhosts/test.conf

2、修改以下位置

location ~ .*admin\.php$ {

    auth_basic "redhat auth";

    auth_basic_user_file /usr/local/nginx/conf/.htpasswd;

    include     fastcgi_params;

    fastcgi_pass   unix:/tmp/www.sock;

    fastcgi_index  index.php;

    fastcgi_param  SCRIPT_FILENAME  /data/www$fastcgi_script_name;

   }

为

location ~ .*admin\.php$ {

    allow 127.0.0.1;

    deny all;

    include     fastcgi_params;

    fastcgi_pass   unix:/tmp/www.sock;

    fastcgi_index  index.php;

    fastcgi_param  SCRIPT_FILENAME  /data/www$fastcgi_script_name;

3、重新加载

/usr/local/nginx/sbin/nginx -s reload 

4、使用curl访问

curl -x127.0.0.1:80 www.test.com/admin.php -I

HTTP/1.1 200 OK

Server: nginx/1.6.3

Date: Mon, 30 May 2016 09:35:50 GMT

Content-Type: text/html; charset=gbk

Connection: keep-alive

X-Powered-By: PHP/5.4.36

Set-Cookie: H7RV_2132_saltkey=zw67rRx6; expires=Wed, 29-Jun-2016 09:35:50 GMT; path=/; httponly

Set-Cookie: H7RV_2132_lastvisit=1464597350; expires=Wed, 29-Jun-2016 09:35:50 GMT; path=/

Set-Cookie: H7RV_2132_sid=U05iX3; expires=Tue, 31-May-2016 09:35:50 GMT; path=/

Set-Cookie: H7RV_2132_lastact=1464600950%09admin.php%09; expires=Tue, 31-May-2016 09:35:50 GMT; path=/

（127.0.0.1可以访问）

curl -x10.10.13.247:80 www.test.com/admin.php -I

HTTP/1.1 403 Forbidden

Server: nginx/1.6.3

Date: Mon, 30 May 2016 09:36:40 GMT

Content-Type: text/html

Content-Length: 168

Connection: keep-alive

（使用10.10.13.247禁止访问）
5、也可以使用全局配置不允许指定地址访问

直接在root /data/www;底下设定allow或deny

6、如果要限制某个ip对整个网站的访问直接在主机下面写deny即可，如下：

  listen 80 ;

    server_name www.test.com www.aaa.com www.bbb.com;

    index index.html index.htm index.php;

    root /data/www;

    deny 127.0.0.1;