FTP questions : PORT and PASV

rossonieri#1rossonieri#1 Member Posts: 799 ■■■□□□□□□□
hi guys,

i'm wondering if you could give me some explanation how does PORT and PASV command work in raw FTP actually? does it have to do with server-side too or only for the FTP client.

i'm having a this heavy discussion with a friend of mine about this RFC 959 that he insisted current FTP client software implementation dis-obey the draft without using both PORT and PASV

and these error codes :
FileZilla -> 503 Bad sequence of commands.
Pure-FTPd -> 425 No data connection
vsFTPd -> 425 Use PORT or PASV first.

any help would be highly appreciated, thank you.
the More I know, that is more and More I dont know.
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