SolarWinds | Serv-U
Contact Support: 866-530-8040 | Contact Sales: 855-498-4154 or email | Show Flags | Login
Serv-U FTP Server Home Page
The Best for Less
Secure file transfer & share files
from anywhere - affordably

FREE for 14 Days
Full featured trial with secure
FTP, file sharing & web transfer


Authentication (AUTH)  -  KB Article #1475

Related Articles --

The AUTH command is used to initialize a secure connection to the connected FTP server. Included with the AUTH command is a case-insensitive parameter defining the security mechinism the client is requesting to use to secure the session. Sample security mechanisms used by popular FTP clients are SSL and TLS. The AUTH command should be followed by a USER command to authenticate access to the server after establishing a secure channel. The AUTH command is not used to secure the connection if secure connections are implicitly required by the server (usually done by allowing connections on port 990).

Common Responses
502, 504, 534, 431
500, 501, 421

See Also

  • Implicit vs. Explicit SSL
  • About FTP Response Codes
  • FTP Commands
  • FTP Response Codes

  • Login to Customer Service Center

    Please enter your e-mail address and password in the fields below.

    Email Address: