networking Archives - Arcadiy Ivanov https://www.ivanov.biz/tag/networking/ Fighting entropy one code line at a time Tue, 31 Mar 2026 23:50:11 +0000 en-US hourly 1 https://wordpress.org/?v=6.9.4 https://www.ivanov.biz/wp-content/uploads/2023/02/cropped-Arcadiy_2141-scaled-e1677291990351-32x32.jpg networking Archives - Arcadiy Ivanov https://www.ivanov.biz/tag/networking/ 32 32 84149164 One-Way Audio on Asterisk Behind NAT: A Deep Dive into Conntrack Tuple Collisions https://www.ivanov.biz/2026/one-way-audio-on-asterisk-behind-nat-conntrack-tuple-collisions/ https://www.ivanov.biz/2026/one-way-audio-on-asterisk-behind-nat-conntrack-tuple-collisions/#respond Tue, 31 Mar 2026 23:50:11 +0000 https://www.ivanov.biz/?p=789 The Setup Asterisk PBX runs directly on a Linux firewall (Fedora) with two network interfaces: WAN interface: public IP, connected to the internet LAN interface: 192.168.x.1/24, serving the internal network An FXS adapter with an analog phone sits on the LAN. Outbound calls go through a SIP trunking provider. The firewall handles NAT for the … Continue reading "One-Way Audio on Asterisk Behind NAT: A Deep Dive into Conntrack Tuple Collisions"

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