Change the Solaris telnet banner
Contributed by qmchenry 
September 15, 2003 
Tagged: Solaris security
The default banner displayed during a telnet login contains the Solaris version which can be useful to a potential attacker.
Create a plain text file called /etc/default/telnetd which contains a line such as:
BANNER="Unauthorized access prohibited\n\n"
The \n characters encode blank lines.