Fish shell function to reject a host using UFW and conntrack to purge state table entries

ufw-rejectatron.fish

function reject
    touch ~/rejected.txt
    for host in $argv
        if grep $host ~/rejected.txt
            echo "$host already rejected!"
            sudo conntrack -D --src $host
            sudo conntrack -D --dst $host
            continue
        end
        echo "rejecting $host"
        echo "$host" >> ~/rejected.txt
        sudo ufw insert 1 reject in from $host to any
        sudo ufw insert 1 reject out to $host from any
        sudo conntrack -D --src $host
        sudo conntrack -D --dst $host
    end
end

function unreject
    for host in $argv
        sudo ufw delete reject from any to $host
        sudo ufw delete reject from $host to any
    end
end