Firewall Traversal

Firewall traversal refers to the set of techniques used to allow VoIP signaling and media traffic to pass through firewalls and Network Address Translation (NAT) devices that would otherwise block or mangle the packets.

Key technologies include STUN (Session Traversal Utilities for NAT), TURN (Traversal Using Relays around NAT), and ICE (Interactive Connectivity Establishment). Session Border Controllers also play a critical role in enterprise deployments.

Mobile softphones frequently operate behind carrier-grade NATs and corporate firewalls. Robust firewall traversal is essential for consistent call connectivity. Acrobits Cloud Softphone includes built-in ICE/STUN/TURN support to ensure calls connect reliably in any network environment.