nmap: Host seems down

[John Salatas]

Kalimera se olous,
Sigoura kapoia m..kia exw kanei:
Se ena pc (pc.domain.local me IP 192.168.0.1 ) dinw to exis:
1)
nmap localhost
kai pairnw to exis:
Starting nmap V. 3.30 ( www.insecure.org/nmap/ )
Note: Host seems down. If it is really up, but blocking our ping probes, try 
-P0
Nmap run completed -- 1 IP address (0 hosts up) scanned in 54 seconds

2) 
nmap pc.domain.local 
nmap 127.0.0.1 
nmap 192.168.0.1 
nmap -P0 localhost
nmap -P0 127.0.0.1 
nmap -P0 192.168.0.1 
nmap -P0 pc.domain.local 
to idio me to parapanw

3)
sti synexeia:
ping localhost
PING localhost (127.0.0.1) 56(84) bytes of data.
64 bytes from localhost (127.0.0.1): icmp_seq=1 ttl=64 time=0.107 ms
64 bytes from localhost (127.0.0.1): icmp_seq=2 ttl=64 time=0.075 ms
64 bytes from localhost (127.0.0.1): icmp_seq=3 ttl=64 time=0.064 ms
64 bytes from localhost (127.0.0.1): icmp_seq=4 ttl=64 time=0.072 ms

--- localhost ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 2997ms
rtt min/avg/max/mdev = 0.064/0.079/0.107/0.018 ms

4)
apo allo pc:
nmap pc.domain.local 
Starting nmap V. 3.30 ( www.insecure.org/nmap/ )
Interesting ports on  pc.domain.local (192.168.0.1):
(The 1584 ports scanned but not shown below are in state: closed)
Port       State       Service
22/tcp     open        ssh
53/tcp     open        domain
80/tcp     open        http
111/tcp    open        sunrpc
139/tcp    open        netbios-ssn
631/tcp    open        ipp
3306/tcp   open        mysql
6000/tcp   open        X11
10000/tcp  open        snet-sensor-mgmt

Nmap run completed -- 1 IP address (1 host up) scanned in 0 seconds

Kamia idea?
Thanks