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Re: Nmap on VPS
From: David Fifield <david () bamsoftware com>
Date: Mon, 27 Jun 2011 11:08:49 -0700

On Thu, Jun 23, 2011 at 04:32:35PM -0500, Tom Sellers wrote:
Hello,
I have a virtualized server (VPS). I use this server to host my blog. I have installed Nmap...But it looks like 
that Nmap is not working proprety. When I scan my office (without root privileges), Nmap reports me some open 
ports. No problem yet. But if I scan as root, Nmap say that allscaned ports are closed. 
I did the same kind of scan for both (priviliged e non priviliged)I scan a OPEN port with root privileges and Nmap 
port report filtred. 
The truth is that some ports are really open. 
BTW: I did a normal installation: yum install nmap5.21.rpm
Does anybody knows what is happening?                         

I have seen several VPS hosting companies that cripple scanning tools
by tweaking various Linux kernel Capabilites flags.  We haven't had
much luck bypassing them and it likely violates terms of service and
would get you booted anyway.

I haven't heard of this before, Tom. I'd be interested to see a
comparison of a packet capture and --packet-trace.

David Fifield
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