securitykernelmodule

Kernel module drops income/outcome packets containing security options.

Building

make

Result:

Makefile  modules.order  Module.symvers  README.md  skm.c  skm.ko  skm.mod  skm.mod.c  skm.mod.o  skm.o  ysend.py

Installation

sudo insmod ./skm.ko

Deinstallation

sudo rmmod ./skm.ko

Log messages check

sudo dmesg

Testing

Incoming packets drop check

Install kernel module skm.ko to PC under test.

Copy scapy script ysend.py to a remote PC an change in script IP address ( in substring dst='192.168.56.134') to IP of PC under test. Run script:

sudo python3 ysend.py

Check that log messages on PC under test contains messages like:

Security filter packet has security options, dropped.