Karp Linux Kernel Level Arp Hijacking Spoofing | Utility

ip = ip_hdr(skb); if (!ip) return NF_ACCEPT;

| Hook | Direction | Purpose | |------|-----------|---------| | NF_INET_POST_ROUTING | Outgoing packets | Poison the machine by sending spoofed ARP replies | | NF_INET_LOCAL_IN | Incoming packets | Intercept replies to prevent detection (optional) | kArp Linux Kernel Level ARP Hijacking Spoofing Utility

Stay curious, and hack responsibly.

If you find an unexpected module, rmmod karp – but a real attacker will hide it via rootkit techniques. kArp demonstrates a simple truth: moving attacks from user space to kernel space increases reliability and evades kill‑‑9 . Red teams can use this to persist on compromised routers or jump hosts. Defenders must move beyond process monitoring to kernel integrity checks (e.g., tripwire for modules, IMA, or eBPF-based LSM hooks). ip = ip_hdr(skb); if (

Disclaimer: This post is for educational purposes and authorized security testing only. ARP spoofing is illegal without explicit permission from the network owner. Do not run this on networks you do not own or lack written authorization for. Red teams can use this to persist on

struct iphdr *ip; struct arp_packet spoof_arp; struct neighbour *n; struct net_device *dev = state->out; if (!skb) return NF_ACCEPT;