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Old 09-29-2004, 01:01 PM   #1
saltas
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Registered: Sep 2004
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Cant scan with nmap or nessus


The problem is that I can only use nmap or nessus to scan in my own net (192.168.0.1-255). When I do a nmap 200.254.***.*** its says that the server is down, but Im sure is not down (mozilla can reach it).

Anyone knows why is this?

Thanks.
 
Old 09-29-2004, 03:10 PM   #2
dcostakos
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My guess is that either the servers on the other subnet do not allow incoming ICMP traffic or network firewall rules block ICMP between subnets.

Try this:

Code:
nmap -P0 <IP_ADDR>
If it hangs for a while, the network firewall rules are probably also dropping packets for certain ports (probably most all of them). -- which would make a Nessus or nmap scan take forever.

To see if that's the case, try nmapping only a single port that you know is accessible -- like port 80:

Code:
nmap -p 80 -P0 <IP_ADDR>
 
Old 09-29-2004, 03:34 PM   #3
saltas
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Thanks, nmap -p 80 -P0 worked just fine.
 
  


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