Comments on: ftp server https://www.emblogic.com/blog/03/ftp-server/ Embedded System and ARM Training Mon, 07 Oct 2013 04:00:03 +0000 hourly 1 http://wordpress.org/?v=3.9.1 By: sujeet mahlan https://www.emblogic.com/blog/03/ftp-server/#comment-3816 Mon, 11 Mar 2013 04:56:50 +0000 http://emblogic.org/blog/?p=6286#comment-3816 Environment. it has two modes -
1)Active mode FTP :=Client connect from a random unprivileged port (n > 1023) to the server command port (21) and sends port command to tell server to connect to n+1 port. The server connects from it’s data port (20) to the client data port (n+1) .

2)Passive mode FTP := Client opens two random unprivileged ports ( n > 1023 and n+1; ex 1026 and 1027) and connects the first port (n) to server command port 21 and issues a pasv command ; client connects to servers specified data port, server completes connection.

]]>