Messing around with my network on Linux (looking for noob stuff, not complicated networking things that make my brain cry)

[Luke -Jr]

On Sunday 21 October 2007, David Nicol wrote:
> On 10/20/07, Billy Crook <billycrook at gmail.com> wrote:
> > Yeah, nmap is "a software" worth checking out.  Even more fun would be
> > to scan your local subnet in RR for web servers to see what your
> > neighbors computers are hosting.
> >
> > nmap -p80 127.69.76.168/20
> >
> > That would search your local subnet in roadrunner for webservers.  I
> > got /20 from the 255.255.240.0 subnet, and that IP address is the one
> > the netgear gave as the public.  Try it on your own.
>
> When I first had access to roadrunner, I ran ethereal to find out what the
> stray packets working their way into my LAN were. (lots of arp requests.)
> TWC detected this somehow (perhaps dns lookups for internal routers?
> I don't know) and shut off our service until I talked with someone and
> promised not to do it again or something.  Port scanning your neighbors
> is something that they really should detect, if they do or not.

Nothing wrong with simple network sniffing or portscanners.