Testing netfilter LKM

1. create vm: cd src && vagrant up
2. ssh to vm: vagrant ssh
3. compile netfilter lkm: cd lkm && make all
4. insert module in kernel: ./use_mod.sh
5. do a test dns lookup: nslookup yo.com 8.8.8.8
6. check logs for new modules prints: dmesg | grep "client port"
7. remove new kernal module and clean: ./remove_mod.sh