Using 0.0.0.0 Instead of 127.0.0.1 in /etc/hosts
Using `0.0.0.0` for blocking is more efficient than `127.0.0.1`, as it leads to immediate connection failure without involving a round-trip to the local machine.
Shell Utilities for Checking Certificates
Efficiently retrieve and display SSL/TLS certificates for any given host or URL, including those with specified or embedded ports.