server {
listen 80;
server_name abc.com;
access_log  off;
rewrite (.+) $scheme://www.$host$1 permanent;
}

location / {
if ($host = 'www.abc.com')
{
rewrite ^/(.*)$ http://www.def.com/$1 permanent;
}
}

set $rewrite true;
if ($remote_addr = "xxx.xxx.xxx.xxx") {
set $rewrite false;
}
if ($rewrite = true) {
rewrite (.+) http://www.abc.com/maintenance.html;
}
location = /maintenance.html {
 root /var/vhost;
}

location /post {
rewrite (.+) http://www.abc.com/bbs$1 permanent;
}

if ($request_uri ~* ^/note\.php\?product_code=(.*)$) {
rewrite (.*) http://www.abc.com permanent;
}

if ($request_uri ~ ^/forum-(140|141|142|143|144|145|150|151|152|153|154|155|156|157|158|159|200|222|223|224|225|226|227|228)-(\d+).html$) {
rewrite (.*) http://www.abc.com/list permanent;
}

location ~* /upload/.*\.php$ {
return 404;
}

location ~* ^/ab/maintain/main.html {
rewrite (.+) http://www.abc.com/maintain/main.html permanent;
}