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Re: Connectivity problems with the US Army
From: "HALL, NATHANIEL D." <halln () OTC EDU>
Date: Fri, 19 Jan 2007 12:48:36 -0600

-----Original Message-----
From: Brock, Anthony - NET [mailto:Anthony.Brock () OREGONSTATE EDU]
Sent: Friday, January 19, 2007 11:18 AM
Subject: Re: [SECURITY] Connectivity problems with the US Army

-----Original Message-----
Maybe they meant 29 IPs were probing.  We saw around 35 of
your IPs either
scanning port 2967 or actively attempting to exploit the Symantec
vulnerability against systems here.

Very possible. However, this still seems a bit extreme for
a "permanent block" of this scale. Also, there should be some method
notifying the affected site and correcting the issue.

I both agree and disagree.  In my case I was watching for SSH brute
force scans.  Each time I saw a scan I would contact the abuse,
security, or NOC contact and send logs.  Rarely did I receive a
response.  If there were 3 or more occurrences (i.e. three or more days
of any host scanning) then I would block the organizations entire
address space.

Once when I did that I caused a lot of websites to quit loading because
the organization was a large NOC.  I began to add exclusions so that the
pages would load.  The admin thought I was going overboard because I
blocked their entire range because of 4 occurrences.  I'm sorry, but the
student information I am protecting is much more important than being
able to access those websites.  My Vice-President and Dean agree.  If a
website is important enough, then we make an exception.

Network Security System Administrator
OTC Computer Networking

Office: (417) 447-7535

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