FTPS implicit TLS/SSL error -
i using ftp on implicit ssl upload files. encountered following error message
[command] pwd [response] 257 "/" current directory. [command] pwd [response] 257 "/" current directory. [command] type [response] 200 type set [command] pwd [response] 257 "/" current directory. [command] pasv [response] 227 entering passive mode (10,0,0,19,195,113) [command] list -al [response] 521 prot p required [command] pwd [response] 257 "/" current directory. [command] pasv [response] 227 entering passive mode (10,0,0,19,195,114) [command] list -al [response] 521 prot p required [status] failed::ftp protocol error. 521 prot p required.
may know error message "521 prot p required" saying?
thanks
before starting data transfer (e.g. creating new data connection outside control connection transfer files or listing) have specify protection level using prot
command. main protection levels p
protected (e.g. ssl encryption) or c
clear (no encryption). server complains, because don't specify protection level , not know how want data.
the prot
command must implemented , used ftps clients.
Comments
Post a Comment