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RE: HTTP request working via hostname but not via IP address
From: "Hiten Pankhania" <hiten.pankhania () vanquisbank co uk>
Date: Mon, 8 May 2006 16:01:16 +0100

Hi Arjun 

Sorry I don't understand all of the problem..
I'm assuming you are trying to get to a website on iis?

Are there any firewalls involved in the Virtual addressing?
Are you using MS NLB on web servers to virtualises the address?

If so I know there are problems with this, firstly due to the way ISA
firewalls handle NLB and also checkpoints...due to this being a
multicast address.


There are also other thing you need to look at I bet the communication
on the switch is set to using unicast, when the NLB is invoked it uses
multicasting due to a virtual mac address being created..

Hopefully this should lead you into the right direction...


-----Original Message-----
From: Arjun Venkatraman [mailto:arjunishere () gmail com] 
Sent: 08 May 2006 10:56
To: javier () liendo net
Cc: pen-test () securityfocus com
Subject: Re: HTTP request working via hostname but not via IP address

Hey Javier,

The IP i'm trying to reach IS one of two IPs which correspond to a
virtual adress, but this is on an internal network, so the IP I am
aiming for is definitely not virtual.
Any other possibilities?

Cheers
Arjun



On 5/8/06, Javier Liendo <javier () liendo net> wrote:
hello arjun

check if the website is a virtual website...most probably it is and
that is the reason you can only get at it with the hostname and not
the IP address...

regards

javier

On 5/5/06, Arjun Venkatraman <arjunishere () gmail com> wrote:
 Hi all,

 I have a pretty basic sort of problem. While sending an HTTP
request
to a machine using a VBScript, when I mention the hostname in the
URL,
the request goes through smoothly. However, when I mention the IP
address explicitly, the request does not go through. I have
confirmed
he IP address multiple times to make sure the error is not a typo.

If the machine name had not been accessible, I would have concluded
that the DNS query was the problem. But with the hostname working
and
the IP not working I am stumped.

Any ideas?

Cheers

Arjun


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