Re: Nmap on VPS

[David Fifield <david () bamsoftware com>]

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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