Wing FTP Software

Having trouble establishing passive FTP connections:

[04] Fri, 20 Nov 2015 12:19:24 (0000212) 220 Wing FTP Server ready...
[03] Fri, 20 Nov 2015 12:19:24 (0000212) USER (username)
[04] Fri, 20 Nov 2015 12:19:24 (0000212) 331 Password required for (username)
[03] Fri, 20 Nov 2015 12:19:24 (0000212) PASS **********
[04] Fri, 20 Nov 2015 12:19:24 (0000212) 230 User (username) logged in.
[03] Fri, 20 Nov 2015 12:19:25 (0000212) SYST
[04] Fri, 20 Nov 2015 12:19:25 (0000212) 215 UNIX Type: L8
[03] Fri, 20 Nov 2015 12:19:25 (0000212) PWD
[04] Fri, 20 Nov 2015 12:19:25 (0000212) 257 "/" is current directory.
[03] Fri, 20 Nov 2015 12:19:25 (0000212) PASV
[04] Fri, 20 Nov 2015 12:19:25 (0000212) 227 Entering Passive Mode ((ip address),39,21)
[03] Fri, 20 Nov 2015 12:19:25 (0000212) LIST


And that's as far as I get it will eventually timeout and disconnect.

Please have a look on this KB article first: http://www.wftpserver.com/bbs/viewtopic.php?f=5&t=5" rel="nofollow