Memcached security has gained attention following the release of go-derper at Black Hat, emphasizing the importance of robust security practices to prevent unauthorized access. Key recommendations include ensuring proper firewall configurations, starting with blocking all connections and selectively allowing necessary traffic, and binding applications to localhost if they run on a single server to minimize exposure. The text advises against running memcached as root to prevent significant security risks and underscores using SASL authentication to strengthen client access controls. It also stresses the necessity of regularly scanning for open ports using tools like nmap, verifying the legitimacy of all active services, and understanding their security implications to prevent potential breaches that could lead to unintended data exposure.