security without NAT?

[Stevan Tiefert]

Hello list,

I have a thinking problem... If workstations in a private network have set
up a gateway, but the gateway has no NAT-deamon running, are the
workstations not able to be attacked? What happens if these workstations
behind this gateway are serving unprotected services (like shares on
Windows XP Home Edition which are NOT password protected), are they also
not be able to be attacked?

I understand that if these workstations wants to request answers from
outside the private network are never getting answers, but is it possible
to see and attack theses workstations from outside?

With regards
Stevan Tiefert