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Blog Archive

2025

Sockets in the Linux Kernel - Part 2: UDP Socket Lookup on Rx	2025-03-02
Sockets in the Linux Kernel - Part 1: L4 Protocol Demultiplexing on Rx	2025-01-05

Flowtables - Part 2: IPsec gateway in tunnel-mode	2022-08-14
Flowtables - Part 1: A Netfilter/Nftables Fastpath	2022-08-08
Routing Decisions in the Linux Kernel - Part 2: Caching	2022-07-31
Routing Decisions in the Linux Kernel - Part 1: Lookup and packet flow	2022-07-04
Nftables - Demystifying IPsec expressions	2022-01-30

Connection tracking (conntrack) - Part 3: State and Examples	2021-08-07
Connection tracking (conntrack) - Part 2: Core Implementation	2021-04-11
Connection tracking (conntrack) - Part 1: Modules and Hooks	2021-04-04

Nftables - Packet flow and Netfilter hooks in detail	2020-05-29
Nftables - Netfilter and VPN/IPsec packet flow	2020-05-29