Nginx虚拟主机配置，vhosts下面有很多域名的配置：
[root@external-lb01 vhosts]# pwd
/data/nginx/conf/vhosts
[root@external-lb01 vhosts]# ls
443-bpm.veredholdings.com.conf 80-www.bigtreefinance.com.conf fax.bigtreefinance.com.conf
443-www.bigtreefinance.com.conf 80-www.bigtreefinance.com.conf.bak20180307 mobi.bigtreefinance.com.conf
443-www.bigtreefinance.com.conf.bak bpm.bigtreefinance.com.conf www.bigtreefinance.com.conf.bak
443-www.bigtreefinance.com.conf.bak20180307 demo.bigtreefinance.com.conf
80-bpm.veredholdings.com.conf
如果有禁止ip访问，只允许域名访问，只需要配置如下即可：
[root@external-lb01 vhosts]# cat deny.ip.conf
server {
listen 80 default;
server_name _;
return 500;
}
[root@external-lb01 vhosts]# /data/nginx/sbin/nginx -t
nginx: the configuration file /data/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /data/nginx/conf/nginx.conf test is successful
[root@external-lb01 vhosts]# /data/nginx/sbin/nginx -s reload