Words similar to firewall

Example sentences for: firewall

How can you use “firewall” in a sentence? Here are some example sentences to help you improve your vocabulary:

These organizations do not seem to have the "firewall" needs/concerns as other organizations.
It's not an absolute firewall anymore, is it?
As Mayer quoted a source as saying: "She's the perfect firewall ...
Book -- Firewall: The Iran-Contra Conspiracy and Cover-Up , by Lawrence E. Walsh;