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Re: Static or Dynamic IP
From: Shreyas Zare <shreyas () technitium com>
Date: Mon, 9 Nov 2009 23:26:51 +0530


You may query the Primary/Secondary DNS server of that web site to
check out the TTL of the record (you can even check the Minimum value
in SOA record). If its very small (like few minutes) then it "may be"
hosted on dynamic IP and if the TTL is in hours then its almost sure
its on static IP.

Second option just to get a clue would be, to query for PTR record to
find the hostname, as some ISPs give names which can tell you if the
IP is static or dynamic.

Another option is to check out WhoIS database for that IP to get some clues.


On Mon, Nov 9, 2009 at 10:39 PM, Dont Know <dkn4a1 () gmail com> wrote:
Well, I was surprised to see that though.
So I'm looking for some mechanism, that I may come to know abt it, before
working on it...

Alan Greig wrote:

I would be surprised if a site of any note be offered on a dynamic IP. If
the dns for the site is a mainstream dns provider chances are its on a
static ip. Easiest way to confirm does the IP ever change?

----- Original Message -----
From: listbounce () securityfocus com <listbounce () securityfocus com>
To: security-basics () securityfocus com <security-basics () securityfocus com>
Sent: Mon Nov 09 15:04:52 2009
Subject: Static or Dynamic IP

What is the possible way to determine that a web site is hosted on a
static or dynamic ip?

("If at first you don't succeed; call it version 1.0")

Shreyas Zare
Co-Founder, Technitium
eMail: shreyas () technitium com

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