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 What is the difference between "Usenet Search" and "Mimo Usenet Search"? Why am I getting inbound connections and scans when accessing VyprVPN?