Web server security is important for any organization that has a physical or virtual Web server connected to the Internet. It requires a layered defense and is especially important for organizations with customer-facing websites.
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Separate servers should be used for internal and external-facing applications and servers for external-facing applications should be hosted on a DMZ or containerized service network to prevent an attacker from exploiting a vulnerability to gain access to sensitive internal information.
Penetration tests should be run on a regular basis to identify potential attack vectors, which are often caused by out-of-date server modules, configuration or coding errors and poor patch management. Web site security logs should be audited on a continuous basis and stored in a secure location. Other best practices include using a separate development server for testing and debugging, limiting the number of superuser and administrator accounts and deploying an intrusion detection system (IDS) that includes monitoring and analysis of user and system activities, the recognition of patterns typical of attacks, and the analysis of abnormal activity patterns.