Hi All,
I'm looking for the major differences between Open SSH and the SSH you can download from http://www.ssh.fi/ What is the major difference? Why choose OpenSSH over the other?

well the MAJOR difference is that OpenSSH is.. Open. it's a GPL product, and totally open source, as opposed to the standard SSH which is closed source, and poking around with it is not appreciated. I generally find OpenSSH much easier to configure than other servers i've found, the default settings make more sense etc, so you'll need to fiddle less, if at all, to get it going smoothly. that's only my experience tho. There probably are various smaller security issues about all of the various packages, but OpenSSH is the nice, friendly ssh server, and fits in with the GNU ethos much nicer. I think it's more common recently becasue as a GPL product, distributinos are much happier to include it, so it generally spreads around like that.

Main difference ssh.fi's SSH is a commercial version (free for personal use, tho restricted), while OpenSSH is free for personal and commercial deployment. It's being developed by those security guru's at OpenBSD. Another difference is OpenSSH ,due to it's own licensing, forbids inclusion of restricted usage/patented crypto algoritms.

The only reasons I can think of to *not* choose OpenSSH would be having an older (libc5) box that doesn't support easy adding of OpenSSL (which is needed for OpenSSH), or needing those patented crypto's like IDEA for some obscure reason :-]