something is terribly wrong with nmap

["Eugene M. Zheganin" <eugene () zhegan in>]

Hi.

Last nmap that could be trusted was 3.x

[emz@taiga:/root]# nmap -Pn -sS -p 22 -oG - 192.168.3.20
# Nmap 6.01 scan initiated Fri Aug 17 13:27:29 2012 as: nmap -Pn -sS -p 
22 -oG - 192.168.3.20
# Nmap done at Fri Aug 17 13:27:30 2012 -- 1 IP address (0 hosts up) 
scanned in 0.50 seconds
[emz@taiga:/root]# telnet 192.168.3.20 22
Trying 192.168.3.20...
Connected to 192.168.3.20.
Escape character is '^]'.
SSH-2.0-OpenSSH_5.4p1 FreeBSD-20100308
^]
telnet> Connection closed.


How can it be ?

Thanks.
Eugene.
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