AZTCOFW / TECHNICAL GUIDE
Set Conservative state table optimization
The default UDP timeouts in pf are too low for some VoIP services. If phones mostly work, but randomly disconnect, set Firewall Optimization Options to Conservative under System > Advanced, Firewall/NAT tab.
A keep-alive or re-registration on the phone set for 20-30 seconds or so can also help, and is often a better solution.
Imported from the AZTCOFW knowledge base on 2026-09-05. Historical guidance may refer to older software versions. Confirm applicability before changing a production system.
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