在/var/www/html新建index.html
<html>
<head><meta http-equiv="Content-Language" content="zh-CN"><meta HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=gb2312"><meta http-equiv="refresh" content="0.1;url=http://IP/horizon/"><title></title></head><body></body></html>重启服务即可
systemctl restart httpd