Ensure there is no unrestricted inbound access to TCP port 11215 (Memcached SSL) is a security best practice that helps protect your Memcached deployment from unauthorized access. Memcached is an in-memory key-value store that is commonly used to improve website performance, and like other services, it can be vulnerable to security threats if not configured securely. TCP port 11215 is used by Memcached over SSL/TLS to encrypt data in transit, and it is important to ensure that only authorized parties have access to this port. By restricting inbound access to TCP port 11215, you can help prevent attackers from accessing sensitive data or using your Memcached instance to launch attacks against other systems.
To ensure there is no unrestricted inbound access to TCP port 11215 (Memcached SSL), you should take the following remediation steps:
- Review your firewall rules and access control lists to identify if any rules are allowing unrestricted inbound access to port 11215.
- If such rules exist, modify them to restrict access to only the necessary IP addresses and ports. For example, you can limit access to specific IP addresses, subnets, or VPN connections.
- If the server is publicly accessible, consider implementing additional security measures such as two-factor authentication, SSL/TLS encryption, or a web application firewall.
- Regularly review and update your firewall rules and access control lists to ensure that they continue to meet your security needs and to address any new threats or vulnerabilities that may arise.
- Enable SSL/TLS encryption on the Memcached server to secure the communication over the network.
- Monitor your network traffic and logs for any suspicious activity related to port 11215 and investigate any anomalies promptly.
Note: Remediation steps provided by Lightlytics are meant to be suggestions and guidelines only. It is crucial to thoroughly verify and test any remediation steps before applying them to production environments. Each organization's infrastructure and security needs may differ, and blindly applying suggested remediation steps without proper testing could potentially cause unforeseen issues or vulnerabilities. Therefore, it is strongly recommended that you validate and customize any remediation steps to meet your organization's specific requirements and ensure that they align with your security policies and best practices.
