Re: Nmap Stopped Working

[Daniel Miller <bonsaiviking () gmail com>]

On Thu, May 22, 2014 at 2:10 AM, Emily Ann <emilyanncr () gmail com> wrote:

> also every time i get the error i have to uninstall it then reinstall it
> (nmap)...then I can get it to do a single scan.  when i attempt to do
> another, no luck...so i just uninstall/reinstall, ect again
>
>
> On Thu, May 22, 2014 at 12:04 AM, Emily Ann <emilyanncr () gmail com> wrote:
>
> > sorry for the long delay in reply.
> >
> > after runing --iflist, I get the following output:
> >
> > C:\>nmap --iflist
> >
> > Starting Nmap 6.46 ( http://nmap.org ) at 2014-05-21 23:57 US Mountain
> > Standard Time
> >  ************************INTERFACES************************
> > DEV  (SHORT) IP/MASK                      TYPE        UP   MTU  MAC
> > ppp0 (ppp0)  192.168.179.10/0             other       up   1400
> <snip>
> > eth3 (eth3)  192.168.1.101/24             ethernet    up   1500
> > B8:88:E3:AF:54:22
<snip>
> **************************ROUTES**************************
> > DST/MASK                      DEV  METRIC GATEWAY
> <snip>
>
> 0.0.0.0/0                     ppp0 21
> > 0.0.0.0/0                     eth3 4245   192.168.1.1
> <snip>
> > After runinning --route-dse scanme.nmap.org I recieve the following
> > message:
> > C:\>nmap --route-dst scanme.nmap.org
> >
> >  Starting Nmap 6.46 ( http://nmap.org ) at 2014-05-21 23:59 US Mountain
> > Standard Time
> > 74.207.244.221
> > ppp0 ppp0 srcaddr 192.168.179.10 direct
> > WARNING: No targets were specified, so 0 hosts scanned.
> > Nmap done: 0 IP addresses (0 hosts up) scanned in 0.48 seconds

Emily,

It looks like you have 2 different interfaces with routes to the Internet:
ppp0 and eth3. Nmap is choosing ppp0 because it has the lower metric, but
it doesn't know how to handle non-ethernet devices. You have 2 options:

1. You can manually specify the interface to use with the -e option: nmap
-e eth3 scanme.nmap.org

2. You may be able to use --send-ip to use the ppp0 interface, but I'm not
sure. This depends on what types of probes you intend to send, and how Nmap
handles non-ethernet interfaces on Windows. I would personally appreciate a
reply that says whether this option worked for you, since it will help us
answer other folks who may run into the same problem.

Hope this helps!
Dan
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