06-10-2011
Solaris 8 did not have an included ssh, so you had to use openssh. Solaris 10 includes ssh. Not sure about Solaris 9. I have recently succeeded in getting folks around here to stop installing openssh on Solaris 10. The Solaris 10 ssh is good enough and I don't see any reason to install openssh. But to answer your question, it certainly is possible to do so.
The main difference I see between the two is how the crypto stuff is done. Openssh depends on the sweet crypto library in openssl. The Solaris 10 ssh uses something that Sun calls "the Solaris cryptographic framework". We still install openssl because lots of other stuff needs it. Also the openssl command itself is great for various scripting applications. I can't find it now, but I remember reading something that indicated that the Solaris framework can use special crypto hardware if it's present. That's pretty cool and it's a good reason to prefer Solaris ssh over openssh.
A secondary consideration is that Solaris ssh is officially supported by Sun (or Oracle).
But if anyone knows a good reason to install openssh on Solaris 10, please speak up. I would welcome another point of view on the subject.
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LEARN ABOUT PHP
sftp-server
sftp-server(1M) System Administration Commands sftp-server(1M)
NAME
sftp-server - SFTP server subsystem
SYNOPSIS
/usr/lib/ssh/sftp-server
DESCRIPTION
sftp-server implements the server side of the SSH File Transfer Protocol as defined in the IETF draft-ietf-secsh-filexfer.
sftp-server is a subsystem for sshd(1M) and must not be run directly. There are no options or config settings.
To enable the sftp-server subsystem for sshd add the following to /etc/ssh/sshd_config:
Subsystem sftp /usr/lib/ssh/sftp-server
See sshd_config(4) for a description of the format and contents of that file.
There is no relationship between the protocol used by sftp-server and the FTP protocol (RFC 959) provided by in.ftpd.
EXIT STATUS
The following exit values are returned:
0 Successful completion.
>0 An error occurred.
FILES
/usr/lib/sftp-server
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWsshdu |
+-----------------------------+-----------------------------+
|Interface Stability |Evolving |
+-----------------------------+-----------------------------+
SEE ALSO
sftp(1), ssh(1), ssh-add(1), ssh-keygen(1), sshd(1M), sshd_config(4), attributes(5)
To view license terms, attribution, and copyright for OpenSSH, the default path is /var/sadm/pkg/SUNWsshdr/install/copyright. If the
Solaris operating environment has been installed anywhere other than the default, modify the given path to access the file at the installed
location.
AUTHOR
Markus Friedl
SunOS 5.10 30 Jul 2003 sftp-server(1M)