Fingerprint server
> telnet ip_address
>> Common Banner ListOS/BannerSolaris 8/SunOS 5.8Solaris 2.6/SunOS 5.6Solaris 2.4 or 2.5.1/Unix(r) System V Release 4.0 (hostname)SunOS 4.1.x/SunOS Unix (hostname)FreeBSD/FreeBSD/i386 (hostname) (ttyp1)NetBSD/NetBSD/i386 (hostname) (ttyp1)OpenBSD/OpenBSD/i386 (hostname) (ttyp1)Red Hat 8.0/Red Hat Linux release 8.0 (Psyche)Debian 3.0/Debian GNU/Linux 3.0 / hostnameSGI IRIX 6.x/IRIX (hostname)IBM AIX 4.1.x/AIX Version 4 (C) Copyrights by IBM and by others 1982, 1994.IBM AIX 4.2.x or 4.3.x/AIX Version 4 (C) Copyrights by IBM and by others 1982, 1996.Nokia IPSO/IPSO (hostname) (ttyp0)Cisco IOS/User Access VerificationLivingston ComOS/ComOS - Livingston PortMaster
> telnetfp

Password Attack
> Common passwords
> Hydra brute force
> Brutus
> telnet -l "-froot" hostname (Solaris 10+)

Examine configuration files
> /etc/inetd.conf
> /etc/xinetd.d/telnet
> /etc/xinetd.d/stelnet