Show HN: We Fixed UniFi's Slow PPPoE Performance with PPPoE Half-Bridge
Technical analysis of performance bottlenecks in UniFi networking hardware when using PPPoE connections. The article explains how the lack of hardware acceleration for PPPoE protocols forces CPU-intensive processing, limiting throughput on high-speed internet plans.
Why it matters
It provides actionable troubleshooting for network administrators and power users facing speed issues with popular enterprise-grade home networking equipment.
At ArcBox Labs , our office has a 5 Gbps PPPoE connection behind a UniFi gateway, and we could never get anywhere close to that speed, and our UDM Pro Max is beginning to struggle and even affecting operation stability:
This matches the behavior observed by many other UniFi users:
The overwhelming majority of UniFi gateways, from the UDM Pro/SE/Pro Max and UXG Pro to the EFG, ship with CPUs that support neither PPPoE nor NAT hardware acceleration. As a result, whenever you put a PPPoE-based ISP connection behind one of these gateways, throughput takes a serious hit and never comes close to the rated line speed. This has been well-documented in the UniFi community:
In short, UniFi gateway PPPoE performance is pretty grim:
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