On Mon, 03 Apr 2000, you wrote:
> On Mon, 3 Apr 2000, Ian C.Sison wrote:
>
> > On Mon, 03 Apr 2000, you wrote:
> >
> > > won't masquerading be transparent to the cable company? how would they know
> > > if one's using ipmasq?
> >
> > Ever hear of port-scanning technology ?
> > Ever hear of TCP fingerprinting ?
>
> Care to expound on this?
Port scans can identify open ports, and service probes can identify them as
proxies or certain services which may not be allowed as per whatever AUP the
service provider may have.
TCP Fingerprinting can determine machine OS types connected to the internal
network.
Of course, a lot of things can be done to 'hide' certain services from
appearing from the 'public' interface, but the chances are that simple NT or
Wingate proxies, to even linux gateways can be determined from a simple port
and service scan.
Evidence gathered from this can be used as basis for termination of service or
an appropriate increase in subscription costs.
It's quite a no-brainer really, but puts a lot of teeth into enforcement of
AUPs.
-
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