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RE: How to bypass firewalls
From: "David Gillett" <gillettdavid () fhda edu>
Date: Mon, 10 May 2010 12:29:07 -0700

  An interesting suggestion, which fails if the firewall is an SSL proxy
such as Blue Coat sells....

David Gillett


-----Original Message-----
From: John Morrison [mailto:john.morrison101 () googlemail com]
Sent: Friday, May 07, 2010 02:09
To: Raja
Cc: listbounce () securityfocus com; security-basics () securityfocus com
Subject: Re: How to bypass firewalls

Raja,

Could you just set up an https connection and run the traffic through as
though it is a VPN tunnel? The firewall won't be able to see the traffic (it
is encrypted).

On 6 May 2010 21:47,  <danuxx () gmail com> wrote:
Not an expert on this topic but I know a common way to do so by taking
advantage of protocols behaviour and stateful inspection design.

So let's say that the firewall has stateful inspection for ftp and IRC
protocols, you can inject ftp PORT commands during ftp sessions to fool the
firewall into thinking that it is an IRC transaction and since this protocol
uses peer to peer connections the firewall will automatically open any port
needed by the IRC server(attacker) to the chat client (victim).

Although this flaw has been patched by Netfilter team, definitely
constitutes a sexy way to bypass firewalls.

Google "phrack breaking through a firewall".
Sent via BlackBerry from Danux Network

-----Original Message-----
From: Raja <raja1.it.consultant () gmail com>
Date: Thu, 06 May 2010 09:32:35
To: <security-basics () securityfocus com>
Subject: How to bypass firewalls

Hi,

Can anybody let me know the available methods for bypassing firewall
for all kinds of traffic?

Thanks,
Raja

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------------------------------------------------------------------------
Securing Apache Web Server with thawte Digital Certificate In this guide we
examine the importance of Apache-SSL and who needs an SSL certificate.  We
look at how SSL works, how it benefits your company and how your customers
can tell if a site is secure. You will find out how to test, purchase,
install and use a thawte Digital Certificate on your Apache web server.
Throughout, best practices for set-up are highlighted to help you ensure
efficient ongoing management of your encryption keys and digital
certificates.

http://www.dinclinx.com/Redirect.aspx?36;4175;25;1371;0;5;946;e13b6be442f727
d1
------------------------------------------------------------------------


------------------------------------------------------------------------
Securing Apache Web Server with thawte Digital Certificate
In this guide we examine the importance of Apache-SSL and who needs an SSL certificate.  We look at how SSL works, how 
it benefits your company and how your customers can tell if a site is secure. You will find out how to test, purchase, 
install and use a thawte Digital Certificate on your Apache web server. Throughout, best practices for set-up are 
highlighted to help you ensure efficient ongoing management of your encryption keys and digital certificates.

http://www.dinclinx.com/Redirect.aspx?36;4175;25;1371;0;5;946;e13b6be442f727d1
------------------------------------------------------------------------


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