| Order Allow,Deny | Apache | ProFTPD |
| 仅匹配Allow | Allow | Allow |
| 仅匹配Deny | Deny | Deny |
| 没有匹配 | 默认Deny | 默认Allow |
| 匹配Allow和Deny | 最后匹配Deny | 首先匹配Allow |
| Order Deny,Allow | Apache | ProFTPD |
| 仅匹配Allow | Allow | Allow |
| 仅匹配Deny | Deny | Deny |
| 没有匹配 | 默认Allow | 默认Deny |
| 匹配Allow和Deny | 最后匹配Allow | 首先匹配Deny |
参考：
http://httpd.apache.org/docs/1.3/mod/mod_access.html
http://www.proftpd.org/docs/directives/linked/config_ref_Order.html
http://www.proftpd.org/docs/howto/Limit.html