implicit ssl vs explicit ssl

jerardfjay · #1 (**permalink**) 08-03-2005

Can someone explain the difference between the two. Thanks

Perderabo · #2 (**permalink**) 08-03-2005

With explicit ssl you connect to the standard ftp port (23). Then the client sends an AUTH TLS or AUTH TLS-C command to switch the session into ssl mode. If the client does not send that command, you get an ordinary ftp session. This switches the control connection into ssl mode. And a PROT P command is used to to run ssl on the data connection. This client is in complete control.

With implicit ssl, you connect to port 990. Any ftp server on that port will automatically be in ssl mode. This is like https running on a different port.

There is also a half-and-half. Connect on port 23 and use AUTH SSL to explicitly switch the control connection into ssl mode. The data connection will implicitly be in ssl mode with no explicit command required.

rfc 2228

More UNIX and Linux Forum Topics You Might Find Helpful
Thread	Thread Starter	Forum	Replies	Last Post
connection to localhost:10.0 host broken (explicit kill or server shutdown)	bache_gowda	UNIX for Advanced & Expert Users	5	06-28-2008 03:25 AM
FTP/implicit SSL	sridatos	Shell Programming and Scripting	2	01-04-2008 07:30 PM
Implicit login in AIX	rajesh_149	AIX	1	08-24-2005 03:33 PM
Implicit Ping	skotapal	Shell Programming and Scripting	2	11-11-2004 11:40 AM
gcc warnings: implicit declaration of function...	Ahsan	High Level Programming	2	08-29-2003 11:15 PM

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes	Rate This Thread
Switch to Linear Mode Hybrid Mode Switch to Threaded Mode	Rate This Thread:


	Powered by