IE and Opera can connect SFTP can not connect - Whay

Hello FTP experts,

I would need some help on this one. Everything was fine than suddenly I could not connect to one of my FTP server if I use SFTP or Windows ftp client.

I assumed something is wrong whit it. After few days I start to investigate what is going on. I found out that if I use IE or Opera I do not have any problem to connect. Whit others FTP servers I do note have any problem.

Description of the problem:

1. Server call

2. About 600 characters has received from FTP server and then

3. Timeout (60s).
Active Help: https://www.smartftp.com/support/kb/58
Client closed the connection

Any idea what is going on whit this server?

Thanks

Hi, plz pastea complete connection log. Also you can try to raise timeout to 120s or change pasv mode with port mode.