hi,
you can protect your servers,internet access but you cant protect all your
network(and have some speed

). You can protect with IPSEC, firewall,proxy
with domain authentications. but there are some equpments wich you simple
cant protect(network printers).
802.1x it could be easy passed because there are some equipments wich dosent
suport 802.1x(printers,hubs for example) in fact the hubs are the biggest
problem of 802.1x .
--
Dragos CAMARA
MCSA Windows 2003 server
"Nick Domukhovsky" wrote:
> > Is there a way to deny access to people that are not added into my domain.
> > For example, a network with 300 computers. They are all added to my domain,
> > if someone then plugs themselves into my network how can i stop them from
> > accessing the internet and network resources?
> >
> > Thanks
>
> The best way to control plug of foreign PCs is to use 802.1x technology.
> Most modern network equipment supports this.
>
> Also you can place a firewall between your LAN and Internet, which would
> require authentication from users (for example, place an ISA server).
> And in your internal network you can deny anonymous access to all
> resources - but this would require a lot of work.
>
>
>
> --
> With best regards
> Nickolay Domukhovsky, MCSA
>