Hi Yutaka, I'm having a hard time trying to make some FTPS clients to open a data connection through a Delegate FTPS proxy. (The login process goes smooth; no problems with the control connnection.) The problem seems to be that the FTPS clients are using implicit SSL protection of the FTP session, i.e., they don't seem to be using AUTH TLS or AUTH SSL. Does Delegate support such type of clients? My config file is shown below: -vv LIBPATH='${LIBDIR}:/usr/local/lib:/usr/lib' -P990 SERVER=ftp STLS=fcl,"sslway -vd -cert cert.pem" Some excerpts from the log file: 03/29 01:42:08.83 [15424] 1+0: isinSSL ? [80] from client 03/29 01:42:08.83 [15424] 1+0: SSL Hello?5 [80 130 1 3 1] 03/29 01:42:08.83 [15425] 1+0: -- Fork(FCL): 15424 -> 15425 03/29 01:42:08.84 [15425] 1+0: ## SSLway CFI_TYPE=FCL: -ac is assumed 03/29 01:42:08.84 [15425] 1+0: ## SSLway start 03/29 01:42:08.84 [15425] 1+0: TCP_NODELAY[8] 0 -> 1 03/29 01:42:08.84 [15425] 1+0: TCP_NODELAY[14] 0 -> 1 03/29 01:42:08.84 [15425] 1+0: ## SSLway reuse ctx #2400000 000F0X 03/29 01:42:08.84 [15424] 1+0: ## STLS ## IMPLICIT SSL ON 27,27,27,14 03/29 01:42:08.99 [15424] 1+0/4/3: #### EPSV^M 03/29 01:42:08.99 [15424] 1+0/4/4: cannot make FTP data port: no control conn-2. 03/29 01:42:08.99 [15425] 1+0: ## SSLway S-C: 39/39 -> 39/SSL 03/29 01:42:08.99 [15424] 1+0/4/4: PASV [] >> 500 Can't create Passive Mode socket.^M 03/29 01:42:08.99 [15424] 1+0/4/4: service_ftp: start PollIns=[8,27] Your help is greatly appreaciated! Thanks, Marcelo