Sophos XG / Sophos Firewall VoIP Configuration Guide for Cloud PBX
If you’re running a Sophos Firewall in front of a hosted VoIP platform and dealing with dropped calls, one-way audio, or choppy conversations, the issue is often firewall behavior, not your provider. This guide walks MSPs and IT admins through a proven Sophos Firewall baseline that stabilizes SIP, RTP, UDP timeouts, DoS protection, and QoS for cloud voice. You’ll learn how to properly handle the Sophos SIP module, adjust UDP timeout stream settings, and prevent security features from disrupting legitimate VoIP traffic. Whether you’re tuning an active deployment or planning a migration from legacy XG hardware, this step-by-step breakdown helps you eliminate mystery VoIP issues and build a repeatable, support-friendly configuration.
