Re: How to make a computer invisible

[Thomas Preissler <tomjohn@gmx.de>]

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Hello,

* Chris wrote on 12/02/03:

> On Tue, 2003-12-02 at 10:14, Michael Gale wrote:
> > Hello,
> > 
> > You can make a machine almost invisible with iptables.
> 
> <snip>
> 
> > So if I do a nmap for all TCP and UDP ports and watch the traffic through a TCP dump the only responses I see are ARP replies.
> 
> I guess this depends on what you mean by "invisible". When you ran your

I mean, that it looks like that the computer with the ip x is not
reachable as the same as it is, when you address an ip that
addresses no computer, i.e. is an unused ip.

I think RECJECTing with "Destination Host Unreachable" is ok and
produces nice results.

But I must have a look at the ARP requests, I think I must feed the
documentation from ebtables, it looks good ;-))

[...]

Background: I am just experimenting and this was an interesting
issue for me. I want to setup a whole net with UML boxes and hide
the physical computer... Just testing, just playing... nothing else.
Just testing about some very crazy networking issues ;-)))


Thx,
Tom
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