What is NAT Firewall? May 14, 2020 16:53 Updated NAT Firewall blocks a range of hacker attacks from reaching your computer when you are connected to VyprVPN. Learn More About NAT Firewall If you need any further assistance, please contact our 24/7 Customer Success Team, who would be glad to assist. Related articles Why doesn't email work when connected with VyprVPN? How do I set up the Giganews Accelerator? Where can I download Mimo? What is the difference between "Usenet Search" and "Mimo Usenet Search"? How do I find a newsgroup to browse?