How eBPF Intercepts Packets Before Kernel Routing
eBPF programs redirect packets at XDP or TC hooks before the kernel routing table is consulted, causing routing confusion when troubleshooting.
Category: eBPF in OpenWRT
Capture Packets in OpenWRT With eBPF: What to Know First
For an openwrt packet capture on a small router, that split keeps the job honest: `tcpdump` gives Wireshark a standard capture, while eBPF trades full packet.
XDP Firewall on OpenWRT: Early Packet Drop at Line Rate
XDP intercepts packets in the driver before the kernel allocates buffers, enabling high-volume DDoS mitigation and load balancing with minimal CPU cost.
OpenWrt eBPF Kernel Setup: Which Options to Enable
Build OpenWrt with working eBPF support by enabling the right kernel symbols, matching options to XDP, tc, tracing, or BTF, and checking JIT support.