Install nftables

apt update 

apt install make git autoconf autogen libtool bison flex asciidoc libgmp-dev libreadline-dev pkg-config 

echo "install libmnl 1.0.4"
git clone -b libmnl-1.0.4 git://git.netfilter.org/libmnl
cd libmnl
sh autogen.sh
./configure
make -j 4 install

echo "install libnftnl-1.2.0"
cd
git clone -b libnftnl-1.2.0 git://git.netfilter.org/libnftnl
cd libnftnl
sh autogen.sh
./configure --libdir=/lib/x86_64-linux-gnu/
make -j 4 install

 
echo "install nftables v0.9.9"
cd
git clone -b v0.9.9 git://git.netfilter.org/nftables
cd nftables
sh autogen.sh
./configure --libdir=/lib/x86_64-linux-gnu/
make -j 4 install

echo "add crontab on reboot"
echo "@reboot root    nft -f /etc/nftables.conf" >> /etc/crontab