What Is a Firewall?
A firewall acts as a gatekeeper between your network and the internet. It examines all incoming and outgoing traffic and decides whether to allow or block packets based on security rules. Firewalls can be hardware devices, software programs, or cloud services.
Modern next-generation firewalls incorporate application awareness, intrusion prevention, DPI, and machine learning. Unfortunately, these capabilities are also used by governments to censor the internet and block VPN connections.
Firewalls and VPN Blocking
National firewalls like China's Great Firewall, Russia's TSPU, and Iran's filtering system use advanced DPI to block VPN traffic. They detect standard VPN protocols by handshake patterns, packet sizes, and port usage. This is why obfuscation is essential.
How VPNWG Bypasses Firewalls
VPNWG's Amnezia obfuscation makes WireGuard traffic indistinguishable from HTTPS, allowing it to pass through sophisticated national firewalls. How VPNWG bypasses DPI — or see guides for Russia, China, and Iran.