On a Sun Solaris 9 box, how do I know what kind of SFTP server is running?
And, if someone sftp'ed a file to my box, where is the log file I can check if the sftp session was a successful one or not?
Sun Solaris usually uses OpenSSh. You can browse the web for more info on that if needed.
Most systems will log to a log file under /var/log/authlog or something like that. See if that file exists. Otherwise you may need to edit the syslog.conf file under /etc and add it.