RE: what's the meaning of the 0.0.0.0?

[Dave Killion <Dkillion () netscreen com>]

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






------------------------------------------------------------------------
---
------------------------------------------------------------------------
----

Attachment: smime.p7s
Description: