A host-based linux firewall system similar to IPTables or nftables.
Uses the netfilter framework to handle and respond to packets that require action.
Rules will be defined in a configuration file, and will be able to be changed through the command line.
The goal is to begin with a basic packet filtering approach, and move on to more complex filtering through methods such as stateful analysis.
Created on linux kernel 4.19
Set up
Debian systems:
sudo apt-get install build-essential linux-headers-`uname -r`
Run
make;
sudo insmod lkmfirewall.ko options="Enter IP or port" ip="Enter an IP addr"
./fwhelper
Editing Rules
Run ./fwhelper and add/delete rules as needed The configuration file of config.dat can also be edited by itself where rules must be entered in the format of `Source IP Port`
Remove from running modules
sudo rmmod lkmfirewall