The King was finally free! With handling the heavy lifting, the King’s workload dropped from 100% down to nearly nothing. The kingdom's roads could now handle Gigabit speeds without breaking a sweat, and the palace stayed cool.
Generally improves overall latency by relieving a fully loaded CPU. OpenWrt Wiki 4. Limitations & Known Issues Software flow offloading implications - OpenWrt Forum
Necessary for performing NAT offload operations.
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When the hardware handles routing, the CPU usage drops significantly. This allows the router to handle more concurrent connections and keep other services (like VPNs or SQM) running smoothly without freezing. 3. Reduced Latency
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Are you trying to on a specific router model?
[ Incoming Packet ] │ ▼ [ nftables Firewall ] ───( First packet evaluated against rules ) │ ▼ [ Flow Table Creation ] ──( Stream identified and logged ) │ ▼ [ kmod-nft-offload ] │ ├──► Software Offload (Bypasses Netfilter stack, handled by fast kernel code) │ └──► Hardware Offload (Bypasses CPU entirely, handled by Switch/SoC ASIC) The King was finally free
# 3. Offload the established connection to the hardware # The 'offload' keyword triggers the hardware offload meta l4proto tcp ct state established flow add @f1 accept
kmod-nft-offload is a specialized that provides hardware and software flow offloading support for the nftables firewall engine. By offloading network traffic processing, it bypasses some of the standard CPU-heavy networking stacks to improve overall throughput and reduce latency. Core Functionality
kmod-nft-offload is a netfilter kernel module that enables hardware offload support for the nftables flow table core infrastructure.
It allows the kernel to bypass the expensive task of re-evaluating every packet in a high-speed data stream against the full set of firewall rules once a connection is established. Generally improves overall latency by relieving a fully
: Uses kernel optimizations to speed up the packet flow for established connections.
The modern successor to iptables. It uses a compact virtual machine inside the Linux kernel to evaluate rules much faster.
By following the installation and configuration steps outlined in this guide, you are now equipped to harness the power of hardware offloading in your own network.
uci set firewall.@defaults[0].flow_offloading=1 uci set firewall.@defaults[0].flow_offloading_hw=1 uci commit firewall /etc/init.d/firewall restart Use code with caution. kmod-nft-offload vs. kmod-natflow