Hi Jun,
can you do a “netstat -na|grep ” from your IS host to the ftp server?
This will show you the active connections.
Something obvious:
Remember to logout from the FTP server when transfer is finshed to clean the connections.
pub.client.ftp:logout
As number of available ports are limited to ~64.000 you should check if this is exceeded.
Regards,
Holger
#webMethods#webmethods-Protocol-and-Transport#Integration-Server-and-ESB