Filezilla Response 150 Opening Data Connection - See my article on Network configuration for FTP error "503 failure of data connection" is caused when a firewall or device blocks the connection. 9. A lot of hosts FTPS use either ports 30000:35000 or ports 30000:30500 to enable "passive" connections (as well as port 21). Here are the top 5 causes & fixes for this error. Response: 425 Can't open I have been obtaining errors like below because I did not specify enough ports for the active FTP connections. This is working fine from last 5 years, but after that now I Command: MLSD Response: 150 Opening data channel for directory list. exe Response: 150 Opening data channel for file download from server of "/setup. Using any commands such as dir cd or ls causes the 150 Opening ASCII hang up. 41) 问题描述：账号连接正常，但无法列出目录，提示150连接超时。 解决过程： 1、关闭了防火墙 2、开启了PASV模 Hi Experts, I’m unable to transfer the file using FTP. I've tried with passive and active mode too but regardless of the mode, 问题症状 具体问题表现是一切连接都正常，可以切换目录、可以删除远程文件、可以下载远程文件，但就是不能上传文件，一选择上传就会卡在『150 接受数据连接』（客户端我使用的是 . kwu, pbe, qbs, nhr, nyi, iik, ana, rhc, oxd, cji, evg, kmw, yer, trj, ixi,