fillewila FTP 防火墙 主动 被动 模式 引起 连接超时
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下面为大家介绍一下FTP连接中的PASV和PORT模式：
PORT其实是Standard模式的另一个名字，又称为Active模式。中文意思是“主动模式。
PASV也就是Passive的简写。中文就是“被动模式。
两者之间有什么不同：
不同之处是由于PORT这个方式需要在接上TCP 21端口后，服务器通过自己的TCP 20来发出数据。并且需要建立一个新的连接来传送档案。而PORT的命令包含一些客户端没用的资料，所以有了PASv的出现。
而PASV模式就当然拥有PORT模式的优点及去掉一些PORT的缺点。PASV运行方式就是当服务器接收到PASV命令时，就会自动从端口1024到5000中随机选择，而且还会使用同一个端口来传送数据，不用建立新的连接
Last modified onSaturday, 05 January 2013 13:24
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| # | Time | Memory | Function | Location |
| 1 | 0.0009 | 416168 | {main}( ) | .../index.php:0 |
| 2 | 0.0955 | 4721792 | Joomla\CMS\Application\SiteApplication->execute( ) | .../index.php:49 |
| 3 | 0.0955 | 4721792 | Joomla\CMS\Application\SiteApplication->doExecute( ) | .../CMSApplication.php:196 |
| 4 | 0.3183 | 12450264 | Joomla\CMS\Application\SiteApplication->dispatch( ) | .../SiteApplication.php:233 |
| 5 | 0.3197 | 12475040 | Joomla\CMS\Component\ComponentHelper::renderComponent( ) | .../SiteApplication.php:194 |
| 6 | 0.3207 | 12530368 | Joomla\CMS\Component\ComponentHelper::executeComponent( ) | .../ComponentHelper.php:377 |
| 7 | 0.3210 | 12559192 | require_once( '/var/www/vhosts/shan.info/httpdocs/components/com_k2/k2.php' ) | .../ComponentHelper.php:402 |
| 8 | 0.3337 | 12994600 | K2ControllerItem->execute( ) | .../k2.php:64 |
| 9 | 0.3337 | 12994600 | K2ControllerItem->display( ) | .../BaseController.php:710 |
| 10 | 0.3479 | 13719800 | K2ControllerItem->display( ) | .../item.php:78 |
| 11 | 0.3479 | 13719800 | K2ControllerItem->display( ) | .../controller.php:19 |
| 12 | 0.3545 | 14116168 | Joomla\CMS\Cache\Controller\ViewController->get( ) | .../BaseController.php:663 |
| 13 | 0.3563 | 14136536 | K2ViewItem->display( ) | .../ViewController.php:102 |
| 14 | 0.4383 | 17072376 | K2ViewItem->display( ) | .../view.html.php:742 |
| 15 | 0.4383 | 17072376 | K2ViewItem->loadTemplate( ) | .../HtmlView.php:230 |
| 16 | 0.4409 | 17252576 | include( '/var/www/vhosts/shan.info/httpdocs/templates/gk_publisher/html/com_k2/templates/default/item.php' ) | .../HtmlView.php:701 |
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| Call Stack | ||||
| # | Time | Memory | Function | Location |
| 1 | 0.0009 | 416168 | {main}( ) | .../index.php:0 |
| 2 | 0.0955 | 4721792 | Joomla\CMS\Application\SiteApplication->execute( ) | .../index.php:49 |
| 3 | 0.0955 | 4721792 | Joomla\CMS\Application\SiteApplication->doExecute( ) | .../CMSApplication.php:196 |
| 4 | 0.3183 | 12450264 | Joomla\CMS\Application\SiteApplication->dispatch( ) | .../SiteApplication.php:233 |
| 5 | 0.3197 | 12475040 | Joomla\CMS\Component\ComponentHelper::renderComponent( ) | .../SiteApplication.php:194 |
| 6 | 0.3207 | 12530368 | Joomla\CMS\Component\ComponentHelper::executeComponent( ) | .../ComponentHelper.php:377 |
| 7 | 0.3210 | 12559192 | require_once( '/var/www/vhosts/shan.info/httpdocs/components/com_k2/k2.php' ) | .../ComponentHelper.php:402 |
| 8 | 0.3337 | 12994600 | K2ControllerItem->execute( ) | .../k2.php:64 |
| 9 | 0.3337 | 12994600 | K2ControllerItem->display( ) | .../BaseController.php:710 |
| 10 | 0.3479 | 13719800 | K2ControllerItem->display( ) | .../item.php:78 |
| 11 | 0.3479 | 13719800 | K2ControllerItem->display( ) | .../controller.php:19 |
| 12 | 0.3545 | 14116168 | Joomla\CMS\Cache\Controller\ViewController->get( ) | .../BaseController.php:663 |
| 13 | 0.3563 | 14136536 | K2ViewItem->display( ) | .../ViewController.php:102 |
| 14 | 0.4383 | 17072376 | K2ViewItem->display( ) | .../view.html.php:742 |
| 15 | 0.4383 | 17072376 | K2ViewItem->loadTemplate( ) | .../HtmlView.php:230 |
| 16 | 0.4409 | 17252576 | include( '/var/www/vhosts/shan.info/httpdocs/templates/gk_publisher/html/com_k2/templates/default/item.php' ) | .../HtmlView.php:701 |