Polishken

server {
        listen *:80;
        server_name domnginx.com;
        location / {
                proxy_pass http://6.6.6.6:8080;
                }
if ($host ~* dom1.com|dom2.com) {
return 403;
break;
}
                proxy_set_header Host $host;
                proxy_set_header X-Real-IP $remote_addr;
}

if ($host ~* dom1.com|dom2.com) {
return 403;
break;
}