I am using Core FTP LE, Version 2.2, build 1683 and it goes through Microsoft ISA Server 2006 to the internet. I have many FTP sites configured in the CORE FTP software and able to connect to them, but I have this new FTP site configured which is causing problems and wont connect.The FTP logs show it is able to log in but fails to load diectory.When I dont connect via the ISA Server or connect from outside the office network I am able to connect to the FTP site which wont connect when it goes through the ISA Server. The ISA Server is properly configured for FTP as other FTP sites work through it.
I am getting the below error message in the Logs of Core FTP after it fails to connect :
125 Data Connection already open, Transfer starting
550.: An established connection was aborted by the Software in your host machine.
LIST command failed.
Error loading directory
421 Timeout(900 seconds): closing control connection.
disconnected.
Please suggest what can be a possible solution to it.