RE: what's the meaning of the 0.0.0.0?

["Daniel B. Cid" <danielcid () yahoo com br>]

In linux machines when you try to connect to 0.0.0.0 it goes to
localhost ... And in my last email i said that its a broadcast because
it is going to "all" ips in this "broadcast domain*"...

Daniel B. Cid

> On Thu, 2003-07-24 at 14:53, Dave Killion wrote:
> When I tried to 'nmap 0.0.0.0' on my RedHat 9.0 machine, it essentially
> nmap'd itself.
>
> So, I guess a valid "situation" would be "On a RedHat 9.0".  I've not
> bothered checking anything else.
>
> -Dave
>
> -----Original Message-----
> From: Fernando Gont [mailto:fernando () gont com ar]
> Sent: Wednesday, July 23, 2003 11:23 PM
> To: security-basics () securityfocus com; "Daniel B. Cid"
> Subject: RE: what's the meaning of the 0.0.0.0?
>
>
> At 13:26 22/07/2003 -0400, "Daniel B. Cid" wrote:
>
> > In this case the 0.0.0.0 means a broadcast (DHCP or bootp).
>
> BOOTP broadcasts are sent to the limited broadcast address
> (255.255.255.255), and *not* to 0.0.0.0.
> (The 0.0.0.0 address is used as the *source* address, not the
> destination)
>
>
> > But in other situations the 0.0.0.0 can be localhost or the
> > default gateway(cisco).
>
> What "situations" do you mean?
> loacalhost is 127..x.x.x .
>
> ---
> Fernando Gont
> e-mail: fernando () gont com ar || fgont () acm org
>
>
>
>
>
>
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