我最近为我的网站更换了网络托管公司。我有一个连接到 Windows FTP（IIS 7.5 Windows Server 2008 R2 标准版）的 PHP 应用程序，现在它什么也不做。FTP 上没有更改任何密码或配置。包括更换前后的日志。
前：
2013-11-16 00:00:02 OLD_IP - FTP_IP 21 ControlChannelOpened - - 0 0 e459623e-4140-4c47-9fab-98c300c3a053 -
2013-11-16 00:00:02 OLD_IP - FTP_IP 21 USER FTP_USER 331 0 0 e459623e-4140-4c47-9fab-98c300c3a053 -
2013-11-16 00:00:02 OLD_IP DOMAIN\FTP_USER FTP_IP 21 PASS *** 230 0 0 e459623e-4140-4c47-9fab-98c300c3a053 /
2013-11-16 00:00:02 OLD_IP DOMAIN\FTP_USER FTP_IP 21 CWD /OutToHost 250 0 0 e459623e-4140-4c47-9fab-98c300c3a053 /OutToHost
2013-11-16 00:00:02 OLD_IP DOMAIN\FTP_USER FTP_IP 21 TYPE A 200 0 0 e459623e-4140-4c47-9fab-98c300c3a053 -
2013-11-16 00:00:02 OLD_IP DOMAIN\FTP_USER FTP_IP 21 PORT XX,XX,XX,XX,143,94 200 0 0 e459623e-4140-4c47-9fab-98c300c3a053 -
2013-11-16 00:00:02 OLD_IP DOMAIN\FTP_USER FTP_IP 20 DataChannelOpened - - 0 0 e459623e-4140-4c47-9fab-98c300c3a053 -
2013-11-16 00:00:02 OLD_IP DOMAIN\FTP_USER FTP_IP 20 DataChannelClosed - - 0 0 e459623e-4140-4c47-9fab-98c300c3a053 -
2013-11-16 00:00:02 OLD_IP DOMAIN\FTP_USER FTP_IP 21 NLST . 226 0 0 e459623e-4140-4c47-9fab-98c300c3a053 /OutToHost
2013-11-16 00:00:02 OLD_IP DOMAIN\FTP_USER FTP_IP 21 PWD - 257 0 0 e459623e-4140-4c47-9fab-98c300c3a053 -
2013-11-16 00:00:02 OLD_IP DOMAIN\FTP_USER FTP_IP 21 ControlChannelClosed - - 0 0 e459623e-4140-4c47-9fab-98c300c3a053 -
2013-11-16 00:01:01 OLD_IP - FTP_IP 21 ControlChannelOpened - - 0 0 a477ac1c-fe49-414d-997c-47ea3b6ac80a -
2013-11-16 00:01:01 OLD_IP - FTP_IP 21 USER FTP_USER 331 0 0 a477ac1c-fe49-414d-997c-47ea3b6ac80a -
2013-11-16 00:01:01 OLD_IP DOMAIN\FTP_USER FTP_IP 21 PASS *** 230 0 0 a477ac1c-fe49-414d-997c-47ea3b6ac80a /
2013-11-16 00:01:02 OLD_IP DOMAIN\FTP_USER FTP_IP 21 CWD /OutToHost 250 0 0 a477ac1c-fe49-414d-997c-47ea3b6ac80a /OutToHost
2013-11-16 00:01:02 OLD_IP DOMAIN\FTP_USER FTP_IP 21 TYPE A 200 0 0 a477ac1c-fe49-414d-997c-47ea3b6ac80a -
2013-11-16 00:01:02 OLD_IP DOMAIN\FTP_USER FTP_IP 21 PORT XX,XX,XX,XX,198,3 200 0 0 a477ac1c-fe49-414d-997c-47ea3b6ac80a -
2013-11-16 00:01:02 OLD_IP DOMAIN\FTP_USER FTP_IP 20 DataChannelOpened - - 0 0 a477ac1c-fe49-414d-997c-47ea3b6ac80a -
2013-11-16 00:01:02 OLD_IP DOMAIN\FTP_USER FTP_IP 20 DataChannelClosed - - 0 0 a477ac1c-fe49-414d-997c-47ea3b6ac80a -
2013-11-16 00:01:02 OLD_IP DOMAIN\FTP_USER FTP_IP 21 NLST . 226 0 0 a477ac1c-fe49-414d-997c-47ea3b6ac80a /OutToHost
2013-11-16 00:01:02 OLD_IP DOMAIN\FTP_USER FTP_IP 21 PWD - 257 0 0 a477ac1c-fe49-414d-997c-47ea3b6ac80a -
后：
2013-11-18 12:59:52 NEW_IP - FTP_IP 21 ControlChannelOpened - - 0 0 a03a277b-8736-46c1-8645-d2f806e53c56 -
2013-11-18 12:59:53 NEW_IP - FTP_IP 21 USER FTP_USER 331 0 0 a03a277b-8736-46c1-8645-d2f806e53c56 -
2013-11-18 12:59:53 NEW_IP DOMAIN\FTP_USER FTP_IP 21 PASS *** 230 0 0 a03a277b-8736-46c1-8645-d2f806e53c56 /
2013-11-18 12:59:53 NEW_IP DOMAIN\FTP_USER FTP_IP 21 CWD /OutToHost 250 0 0 a03a277b-8736-46c1-8645-d2f806e53c56 /OutToHost
2013-11-18 12:59:53 NEW_IP DOMAIN\FTP_USER FTP_IP 21 TYPE A 200 0 0 a03a277b-8736-46c1-8645-d2f806e53c56 -
2013-11-18 12:59:53 NEW_IP DOMAIN\FTP_USER FTP_IP 21 PORT YY,YY,YY,YY,231,244 200 0 0 a03a277b-8736-46c1-8645-d2f806e53c56 -
2013-11-18 12:59:53 NEW_IP - FTP_IP 21 ControlChannelOpened - - 0 0 b01f53c4-8669-4e93-bf0d-18aaecb596bd -
2013-11-18 12:59:53 NEW_IP - FTP_IP 21 USER FTP_USER 331 0 0 b01f53c4-8669-4e93-bf0d-18aaecb596bd -
2013-11-18 12:59:53 NEW_IP DOMAIN\FTP_USER FTP_IP 21 PASS *** 230 0 0 b01f53c4-8669-4e93-bf0d-18aaecb596bd /
2013-11-18 12:59:53 NEW_IP DOMAIN\FTP_USER FTP_IP 21 TYPE A 200 0 0 b01f53c4-8669-4e93-bf0d-18aaecb596bd -
2013-11-18 12:59:53 NEW_IP DOMAIN\FTP_USER FTP_IP 21 PORT YY,YY,YY,YY,172,174 200 0 0 b01f53c4-8669-4e93-bf0d-18aaecb596bd -
2013-11-18 13:00:14 NEW_IP DOMAIN\FTP_USER FTP_IP 21 NLST . 550 4294967295 0 a03a277b-8736-46c1-8645-d2f806e53c56 /OutToHost
2013-11-18 13:00:14 NEW_IP DOMAIN\FTP_USER FTP_IP 21 STOR 20131118070002.ord 550 4294967295 0 b01f53c4-8669-4e93-bf0d-18aaecb596bd /20131118070002.ord
2013-11-18 13:01:23 NEW_IP DOMAIN\FTP_USER FTP_IP 21 ControlChannelClosed - - 64 0 a03a277b-8736-46c1-8645-d2f806e53c56 -
2013-11-18 13:01:23 NEW_IP DOMAIN\FTP_USER FTP_IP 21 ControlChannelClosed - - 64 0 b01f53c4-8669-4e93-bf0d-18aaecb596bd -
答案1
新服务器上的防火墙问题。我原以为这不是防火墙的问题，因为它能够创建到 FTP 服务器的初始连接，但我错了。