Penetration Testing mailing list archives
RE: Assessing a machine with 2 NICs
From: "Derick Anderson" <danderson () vikus com>
Date: Mon, 12 Sep 2005 07:38:31 -0400
-----Original Message----- From: barcajax () gmail com [mailto:barcajax () gmail com] Sent: Thursday, September 08, 2005 8:09 PM To: pen-test () securityfocus com Subject: Assessing a machine with 2 NICs Lets say we have a machine running critical business applications connected to the enterprise network on 2 NICs. From an assessment/audit point of view, is it necessary to scan both NICs using assessment tools like NMap and Nessus? Will both scan results produce the same findings (as in same ports and services open)? Does the OS or applications influence the detection of ports/services on different NICs on the same physical machine?
The machine doesn't have to run the same services on both NICs. In my shop we have several machines with two or more virtual interfaces (one NIC, but responds to several IPs) for the purpose of hosting SSL sites. So you might see ports 80 and 443 open on the first IP but only 443 on the second. Having said that, most machines with two physical NICs have them for redundancy and/or speed and by default most services bind to all available IPs. What you will see with a scan depends entirely on the service configurations on the machine. I wouldn't think the OS would do things differently on separate NICs but you never know. Derick Anderson ------------------------------------------------------------------------------ Audit your website security with Acunetix Web Vulnerability Scanner: Hackers are concentrating their efforts on attacking applications on your website. Up to 75% of cyber attacks are launched on shopping carts, forms, login pages, dynamic content etc. Firewalls, SSL and locked-down servers are futile against web application hacking. Check your website for vulnerabilities to SQL injection, Cross site scripting and other web attacks before hackers do! Download Trial at: http://www.securityfocus.com/sponsor/pen-test_050831 -------------------------------------------------------------------------------
Current thread:
- Assessing a machine with 2 NICs barcajax (Sep 11)
- Re: Assessing a machine with 2 NICs Fósforo (Sep 12)
- Re: Assessing a machine with 2 NICs Andres Riancho (Sep 12)
- Re: Assessing a machine with 2 NICs Tim (Sep 12)
- Re: Assessing a machine with 2 NICs Thor (Hammer of God) (Sep 12)
- Re: Assessing a machine with 2 NICs Michael Boman (Sep 12)
- Re: Assessing a machine with 2 NICs Justin . Ross (Sep 12)
- RE: Assessing a machine with 2 NICs Richard Zaluski (Sep 12)
- Re: Assessing a machine with 2 NICs Mark Owen (Sep 12)
- Re: Assessing a machine with 2 NICs Fauchon Olivier (Sep 14)
- <Possible follow-ups>
- RE: Assessing a machine with 2 NICs Derick Anderson (Sep 12)
- Re: RE: Assessing a machine with 2 NICs aldo (Sep 14)