External scans.
Against customer using our internet service.
Does a port have to show as "open" or can they for usability show only as
filtered, closed?
Thoughts?
Shand
----- Original Message -----
From: "Steve Fletcher" <safletcher_at_insightbb.com>
To: "'Sherman Hand'" <shand_at_adelphia.net>;
<security-basics_at_securityfocus.com>
Sent: Wednesday, March 30, 2005 3:18 PM
Subject: RE: Scanning--more then one side to the argument
>I have a question regarding this. Are you talking about doing an external
> scan or an internal scan? I assume an external, because an internal scan
> should show a LOT of open ports.
>
> I would say that any open port POTENTIALLY could be a security issue
> waiting
> to happen, but common sense dictates that some ports must be open for
> usability reasons. Plus, if you're going to follow this line of thought,
> the fact that the systems are connected to the Internet AT ALL poses a
> potential risk. Or, just being networked could be a risk. Or, being
> powered on poses a potential risk.
>
> So, based on this, sure it COULD be a security risk waiting to happen, but
> more information needs to be gathered to determine the true extent of the
> risk. And, it must be reevaluated at regular intervals to catch new
> issues
> that might have come up since the last scan. What is safe now might not
> be
> 6 months from now.
>
> Hope this helps.
>
> Steve Fletcher
> MCSE (NT4/Win2k), MCSE: Security (Win2k), HP Master ASE, CCNA, Security+
> safletcher_at_insightbb.com
>
> -----Original Message-----
> From: Sherman Hand [mailto:shand_at_adelphia.net]
> Sent: Wednesday, March 30, 2005 5:05 PM
> To: security-basics_at_securityfocus.com
> Subject: Scanning--more then one side to the argument
>
>
>
> There has been a on going discussion about the scanning results on our
> customers.
>
> Thought one says that "any" port on a standard nmap, showing as "open" is
> a
> security risk.
>
> Thought two says, no since some things need to show in a state of open.
>
> Should we be stating that through proactive scan, when we find any port
> showing as open, that it is a security issue waiting to happen?
>
> Or only if we can show a issue?
>
> Thoughts?
>
> Shand
>
>
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Received on Mar 31 2005
Intro
