Penetration Testing mailing list archives
Re: Re: Penetration Testing a Firewalled Network
From: killy <killfactory () gmail com>
Date: Wed, 7 Jun 2006 12:33:22 -0400
I was wondering if it was possible to enumerate information about
the internal >>>network through the firewall without compromising the webserver or VPN >>>simply by manipulating the packets passing through the firewall. Try this. Fire up linux. Fireup a browser. From the browser visit the web page. With the browser and web page still up, launch paratrace(unix) piont it to the same web site. It will tunnel through your already open broswer connection. I should show each hop beyond the firewall complete with internal addresses of each hop and I believe the web host's internal address. If the VPN has http/s enabled then you could connect to it from a browser and attempt that same procedure. Assuming I understand what you are asking. As far as packet crafting goes, I have seen where you can set some Make Frag and Off Set flags to convince the firewall that you are there to connect over port 80 and when then firewall reassembles the packets the traffic really pursues another port. On 6 Jun 2006 20:22:41 -0000, kratzer.jason () gmail com <kratzer.jason () gmail com> wrote:
The environment I am trying to pen-test, from an external point of view, only contains a webserver and VPN which are forwarded through the firewall. I was wondering if it was possible to enumerate information about the internal network through the firewall without compromising the webserver or VPN simply by manipulating the packets passing through the firewall. In all of my research it seems as if most "firewalking" is performed by manipulating packets from an isolated dmz through the firewall and against the internal network. --Jason Kratzer ------------------------------------------------------------------------------ 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: CenzicConcerned 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.
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Current thread:
- Penetration Testing a Firewalled Network kratzer . jason (Jun 06)
- Re: Penetration Testing a Firewalled Network James Fryman (Jun 06)
- <Possible follow-ups>
- Re: Re: Penetration Testing a Firewalled Network kratzer . jason (Jun 06)
- Re: Penetration Testing a Firewalled Network James Fryman (Jun 06)
- Re: Re: Penetration Testing a Firewalled Network killy (Jun 07)
- Re: Re: Penetration Testing a Firewalled Network kratzer . jason (Jun 06)
- Re: Penetration Testing a Firewalled Network James Fryman (Jun 07)
- Re: Penetration Testing a Firewalled Network Javier Fernandez-Sanguino (Jun 08)
- Re: Penetration Testing a Firewalled Network James Fryman (Jun 07)
- RE: Re: Penetration Testing a Firewalled Network David M. Zendzian (Jun 06)
- Re: RE: Re: Penetration Testing a Firewalled Network kratzer . jason (Jun 07)
- Re: RE: Re: Penetration Testing a Firewalled Network Eagle Fire (Jun 07)
- Re: RE: Re: Re: Penetration Testing a Firewalled Network kratzer . jason (Jun 07)
- Re: RE: Re: Re: Penetration Testing a Firewalled Network killy (Jun 09)
- Re: Penetration Testing a Firewalled Network Marco Ivaldi (Jun 09)