FTP server and port 20 , 21 Firewall Exception I have configured FTP Server on XP Pro SP2. I have excepted port 21 , then I was able remotly to FTP to windows XP (FTP Server). My question, since with FTP, port 21 for control information (commands and response, like ls, put, get,etc) and posrt 20 for data connection. Shouldn't I have enabled port 20 as well ? Since I have not enabled, why I was able to do FTP to server |
FTP Control Channel, and ls command While I was reading I found this link: http://www.siliconvalleyccie.com/lin...ftp-server.htm Control Channel (command and response), TCP Port 21 and Data Channel, TCP Port 20 I just wondring if there is a typo in the link above , because he is saying : Quote:
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what he is saying is that the LS data (the file listing) is sent over the data connection; your input command (like ls and get) are sent over port 21. |
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ls command client ---> server: port 21 ls data: the directory listing server ---> client : port 20 |
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