BPF comes to firewalls
BPF comes to firewalls
Posted Feb 20, 2018 16:17 UTC (Tue) by josh (subscriber, #17465)In reply to: BPF comes to firewalls by epa
Parent article: BPF comes to firewalls
It was originally used for filtering of packets for tools like tcpdump, so that when you say "show me traffic on tcp port 80 to this IP" the kernel can very quickly select the data you want and feed it to you at wire speed.