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Re: Nmap says Host down when actually host is up.
From: Swapnali <swapnali2 () gmail com>
Date: Thu, 25 Oct 2007 09:08:05 -0500

Following is verbose output.

Nmap says Host 10.10.209.108 seems to be a subnet broadcast address
(returned 1 extra pings)

D:\>nmap -sP -vv --packet-trace 10.10.209.108

Starting Nmap 4.20 ( http://insecure.org ) at 2007-10-23 08:40 Central
Daylight
Time
SENT ( 0.2340s) ICMP 10.205.42.40 > 10.10.209.108 Echo request
(type=8/code=0) tt
l=56 id=10663 iplen=28
SENT (0.2500s) TCP 10.205.42.40:33574 > 10.10.209.108:80 A ttl=54 id=16833
iplen
=40  seq=655835166 win=3072 ack=4099358750
RCVD (0.2660s) ICMP 10.204.100.2 > 10.205.42.40 Echo reply (type=0/code=0)
ttl=2
49 id=10663 iplen=28
Host 10.10.209.108 seems to be a subnet broadcast address (returned 1 extra
ping
s).
Note: Host seems down. If it is really up, but blocking our ping probes, try
-P0

Nmap finished: 1 IP address (0 hosts up) scanned in 2.313 seconds
               Raw packets sent: 2 (68B) | Rcvd: 1 (46B)

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