allow clients to acess parts of an internal network normally?

Question

allow clients to acess parts of an internal network normally inaccessible to people outside the company (answer should be in 8 letters)

Answer 1

I can't think of any terms that cover this and are 8 letters.

try firewall I guess.


Other words that apply, but aren't 8 letters:
tunnel
routing
vpn
proxy
port forwarding
NAT