nmap not scanning networks?

[FreeBSD User]

OE> Chuck Swiger wrote:

>> Alex Povolotsky wrote:
>>> Attempt to scan a network with any method except plain ping results in
>>> an error:
>>> truss nmap -sT -p 21 '172.19.17.*'
>>
>> I can confirm the problem, anyway, although I'm not sure it's germane
>> to freebsd-security.  :-)
>>
>>> [...]
>>> sendto(0x4,0x8094200,0,0x0,{ AF_INET 172.19.17.0:0 },0x10) ERR#49 
>>> 'Can't assign requested address'
>>> [...]
>>> What's strange that man on send(2) doesn't state that EADDRNOTAVAIL
>>> can ever be returned from sendto().

OE> Have you checked the firewall rules and routing tables on your machines?
OE> Do you have the same problems with non-private IP ranges?

I had the same problem because my host IP address was inclusive in the
IP range. Make sure your host IP is not inclusive and see the result.

OE> -Oliver

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