Re: disable valid IPv4 address check to allow scanning Hamachi (5.0.0.0/8) targets?

[David Fifield <david () bamsoftware com>]

On Sat, Apr 02, 2011 at 03:30:19PM -0700, David Fifield wrote:
> On Sat, Apr 02, 2011 at 02:51:21PM -0700, Brolin Empey wrote:
> > When I try scanning an Hamachi client’s 5.0.0.0/8 IP address, nmap
> > states “doArp can only handle IPv4 addresses” and aborts.  I know
> > this is because Hamachi’s assignment of 5.0.0.0/8 IP addresses is
> > unofficial, but it would be nice if the valid IPv4 address check
> > could be disabled so Hamachi clients and other hosts with
> > unofficially-assigned IP addresses could still be scanned.
> >
> > I searched for a solution/workaround but only found discussions
> > about Hamachi’s unofficial IP address assignments, not any way to
> > scan Hamachi clients.
> >
> > I do not think these details matter in this case, but I am currently
> > using nmap v5.50 on Windows 7 Professional IA-32.
>
> There must be something else going wrong, because I can ARP scan
> 5.0.0.0/8 with
>
> /sbin/ifconfig eth0:1 5.1.2.3 netmask 255.0.0.0
> nmap -PR 5.0.0.0/8 --packet-trace

Does it work if you use the -S option to set a source IP address? (It
should be the address of your Hamachi interface.)

David Fifield
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