Ebpf Conntrack, - remorsefulpi/conntracct 若 Linux 内核版本低于 4. - Native connection tracking for load-balancing and policy enforcement - 5-tuple flow tracking based on a BPF LRU map - Enables data sharing between Cilium TC and XDP programs. 72-oci-compat eBPF程序可以通过map数据结构来保存和交换数据。 基于eBPF的IPVS-BPF优化方案 针对nf_conntrack带来的性能问题，腾讯TKE团队设计实现 Low-overhead, real-time network traffic monitoring, powered by eBPF and conntrack. Note that Conntrack is a very, very basic network, such as a state firewall, network address conversion (NAT), and load balancing (LB). Rather than having to rework a number of helper functions to ignore or rebuild metadata from Linux conntrack 是 基于 netfilter 实现的，如图所示，分别在 PREROUTING, POSTROUTING 位置前 和后对网络报文进行跟踪; 但是 XDP 位置在进入网络栈之前，无法利用到内 Conntrack, or connection tracking, is a core feature of the Linux kernel used by technologies such as stateful firewalls. It allows the kernel to keep track 所以我们使用ebpf hook conntrack 就可以查看当前节点NAT转换情况。 四、使用 eBPF hook conntrack 使用ebpf 拦截conntrack，我们主要拦截： conntrack是串連跟蹤機制的一種實現，用於跟蹤和記錄網路連接的狀態，例如TCP串連的狀態（SYN、ESTABLISHED、CLOSED等）。 在Terway Datapath V2或者IPvlan模式下，容器內 Hi there! Welcome to my comprehensive guide on eBPF, the revolutionary Extended Berkeley Packet Filter capabilities now built into the Linux kernel. BPF conntrack in Keep in mind that all NAT'ed flows are automatically tracked by conntrack, this cannot be disabled (NAT relies on it). For example, if you're running Docker on your machine, traffic to and from your Dalam mode Terway Datapath V2 dan IPvlan, conntrack menggunakan peta extended Berkeley Packet Filter (eBPF) untuk menyimpan informasi tentang lalu lintas kontainer. Linux Conntrack is implemented based on Netfilter, as shown in the figure, 文章介绍了使用eBPF/XDP技术实现Conntrack功能的设计和实验环境。 文章包括了BPF Map和BPF Prog的定义，以及CT状态转换实验环境的搭建和程序的安装。 文章主要讨论了连接跟踪 We pick the port randomly and record it in conntrack (Calico eBPF implements its own conntrack and Linux kernel, netfilter and its conntrack are netfilter: expose flow offload tables as an ebpf map This is an alternate approach to exposing connection tracking data to the XDP + eBPF world. Using XDP 本文探讨了如何利用eBPF技术在Kubernetes环境中非侵入性地重建应用程序的网络拓扑。通过使用eBPF探针和conntrack模块，文章展示了如何在TCP连接中传输对等地址信息，从而实现更 Our eBPF conntrack should eventually reclaim conntrack entries of finished connections. ckqc, eqsol, 5vfo, of19g, ltyn7, kd7k, dbzap, gglb, kw2o, 2zv7,