A weird request.

[nbaronian at gmail.com (Nick Baronian)]

I don't know .Net but I remember some old school DOS scripting.  So how
about netcat with something like this
%echo off
set /a count=0
:openport
set /a count=%count%+1
if %count% ==65535 (goto :eof) else (echo Listening on port %count%) && (nc
-l -p %count% -d) && (nc -l -u -p %count% -d)
goto :openport

I haven't had a chance to test it but I believe netcat will spit out an
error when it can't bind to a port, so it should continue thru the loop.
You could use an app like pskill to kill all the processes using nc.exe when
you are done testing.

-Nick Baronian



2009/1/26 Rob Fuller <jd.mubix at gmail.com>

> Anyone willing to make this program? I assume it would be a bit easier on
> linux using iptables and just listening on one port with PORT_FORWARD. Just
> a thought.
>
> 2009/1/22 Dimitrios Kapsalis <dimitrios at gmail.com>
>
> > As hinted before, wouldn't be to hard to write a .net program since this
> > is for windows, that loops across all 65,000 ports and check if its being
> > used, if not then open a port for listening.
> >
> > 2009/1/22 Rob Fuller <jd.mubix at gmail.com>
> >
> > I'ave actually been in the market for this myself. It would be a great way
> > > of determining what egress options you have on a pentest.
> > >
> > >
> > > On Thu, Jan 22, 2009 at 3:59 PM, "Luis Mart?n." <luis.mgarc at gmail.com>wrote:
> > >
> > > > Dunno of any program but it should not be difficult to code something
> > > > for it. Best way is probably:
> > > >
> > > > - Create a simple sniffer using libpcap
> > > > - Listen on evertything
> > > > - Generate TCP-SYN/ACKs using raw sockets and send them back.
> > > >
> > > > Have a look at some examples of simple pcap sniffers here:
> > > > www.programming-pcap.aldabaknocking.com (file tcsyndos.c shouldn't be
> > > > too difficult to modify for your needs, it already crafts custom TCP
> > > > packets).
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > Sam Buhlig wrote:
> > > > > Does anyone know of software that will run on a windows box that will
> > > > > respond on all ports. It does not have to be the correct protocol or
> > > > > anything. Doing some firewall testing and want a box that responds on
> > > > > any and all ports if possible.
> > > > >
> > > > > Thanks in advance.
> > > > ------------------------------------------------------------------------
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