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IPT_PKD Iptables Port Knocking Detection 1.12

Posted Feb 18, 2014

Authored by eric

ipt_pkd is an iptables extension implementing port knock detection with SPA (single packet authorization). This project provides 3 parts: the kernel module ipt_pkd, the iptables user space module libipt_pkd.so, and a user space client knock program. For the knock packet, it uses a UDP packet sent to a random port that contains a SHA-256 of a timestamp, small header, random bytes, and a shared key. ipt_pkd checks the time window of the packet and does the SHA-256 to verify the packet. The shared key is never sent.

Changes: This release fixes a bug in knock.py when sending a knock to a site not in the configuration file or when the configuration file doesn't exist.

tags | tool, kernel, udp, firewall

systems | linux

SHA-256 | 80cfd1f2cb606a00ce131d4f55531bcda605931849efe12331e37b5a2a1bba48

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