BPF (Berkeley Packet Filter)
The kernel-level filter language used by libpcap, tcpdump, Wireshark capture filters, Zeek and many flow exporters. Operates before the packet hits user space, so a tight BPF expression scales to wire speed.
The kernel-level filter language used by libpcap, tcpdump, Wireshark capture filters, Zeek and many flow exporters. Operates before the packet hits user space, so a tight BPF expression scales to wire speed.
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