Re: Somthing intresting.

[gabriel rosenkoetter <gr () ECLIPSED NET>]

On Thu, Feb 15, 2001 at 12:08:45PM -0700, Crypt1 Crypt1 wrote:
> While using nmap i found something interesting. My boss's network
> is on DSL, Setup with 2 ethernet cards. and one computer pluged into
> the hub the other pluged into the dsl modem. Internet address is
> 192.168.133.* well i ended up doing a scan on the hole internal subnet
> When i did i found some computer i did not reconize when
> i telneted to them a few of them came up as cisco routers and
> a few came up as DNS servers. (FROM the out side internet)
> i did a traceroute to them and they resolved to the out side net.
> so you have 192.168.133.0 resolving (lets just say)209.125.12.8
> any reason for this?

Plenty of ISPs use 192 nets on the inside, and plenty of them
presume that it's okay for those to be exposed to their users (which
is a bad presumption for several, fairly obvious, reasons).

They probably don't expect your boss to be doing his own NAT'ing,
which is why they don't NAT between them and him.

If I were he, I would avoid using any subnets on which they're
keeping machines (it should be easy to find a 10 net somewhere
they're not using).

       ~ g r @ eclipsed.net