RE: HTTP request working via hostname but not via IP address

["Hiten Pankhania" <hiten.pankhania () vanquisbank co uk>]

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
------------------------------------------------------------------------
------
> > This List Sponsored by: Cenzic
> >
> > Concerned about Web Application Security?
> > Why not go with the #1 solution - Cenzic, the only one to win the
Analyst's
> > Choice Award from eWeek. As attacks through web applications
continue to rise,
> > you need to proactively protect your applications from hackers.
Cenzic has the
> > most comprehensive solutions to meet your application security
penetration
> > testing and vulnerability management needs. You have an option to go
with a
> > managed service (Cenzic ClickToSecure) or an enterprise software
> > (Cenzic Hailstorm). Download FREE whitepaper on how a managed
service can
> > help you: http://www.cenzic.com/news_events/wpappsec.php
> > And, now for a limited time we can do a FREE audit for you to
confirm your
> > results from other product. Contact us at request () cenzic com for
details.
> >
------------------------------------------------------------------------
------
> >

------------------------------------------------------------------------
------
This List Sponsored by: Cenzic

Concerned about Web Application Security? 
Why not go with the #1 solution - Cenzic, the only one to win the
Analyst's 
Choice Award from eWeek. As attacks through web applications continue to
rise, 
you need to proactively protect your applications from hackers. Cenzic
has the 
most comprehensive solutions to meet your application security
penetration 
testing and vulnerability management needs. You have an option to go
with a 
managed service (Cenzic ClickToSecure) or an enterprise software 
(Cenzic Hailstorm). Download FREE whitepaper on how a managed service
can 
help you: http://www.cenzic.com/news_events/wpappsec.php 
And, now for a limited time we can do a FREE audit for you to confirm
your 
results from other product. Contact us at request () cenzic com for
details.
------------------------------------------------------------------------
------



-------------------------------------------------------------------
Vanquis Bank Limited. Registered office: Colonnade, Sunbridge Road, Bradford BD1 2LQ. Registered number 2558509 England.

Confidentiality. This email (and any attachments) is confidential and intended for the recipient(s) only. This email 
may include proprietary and/or privileged information. If you receive this email in error, please immediately notify 
the Vanquis Service desk (servicedesk () vanquisbank co uk) and then delete the email (and any attachments). Do not 
show, distribute or copy the contents of this email to anyone.

Warning. Although Vanquis Bank has taken reasonable precautions to ensure that no viruses are present in this email or 
attachments, the security of internet communications cannot be guaranteed and therefore, Vanquis Bank will not accept 
any liability for loss or damage arising from receipt of this email.

Any statements or opinions contained in this email or attachments are those of the author and do not necessarily 
reflect the views of Vanquis Bank.


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


------------------------------------------------------------------------------
This List Sponsored by: Cenzic

Concerned about Web Application Security?
Why not go with the #1 solution - Cenzic, the only one to win the Analyst's
Choice Award from eWeek. As attacks through web applications continue to rise,
you need to proactively protect your applications from hackers. Cenzic has the
most comprehensive solutions to meet your application security penetration
testing and vulnerability management needs. You have an option to go with a
managed service (Cenzic ClickToSecure) or an enterprise software
(Cenzic Hailstorm). Download FREE whitepaper on how a managed service can
help you: http://www.cenzic.com/news_events/wpappsec.php
And, now for a limited time we can do a FREE audit for you to confirm your
results from other product. Contact us at request () cenzic com for details.
------------------------------------------------------------------------------