3.3.1.2 Ensure IPv6 loopback traffic is configured
Information
Configure the loopback interface to accept traffic. Configure all other interfaces to deny traffic to the loopback network (::1). Loopback traffic is generated between processes on machine and is typically critical to operation of the system. The loopback interface is the only place that loopback network (::1) traffic should be seen, all other interfaces should ignore traffic on this network as an anti-spoofing measure.
Solution
Run the following commands to implement the loopback rules: # ip6tables -A INPUT -i lo -j ACCEPT # ip6tables -A OUTPUT -o lo -j ACCEPT # ip6tables -A INPUT -s ::1 -j DROP