nginx限制只让某个ip访问

server 
{
    listen 80;
    server_name www.aldjflas.cn;
    access_log /home/logs/bbs/access.log combined buffer=32k;
    error_log /home/logs/bbs/error.log warn;
    index index.html index.htm index.php;
    root /data/www/wwwroot/bbs;
    allow 219.232.244.234;
    deny all;
}