TCP port 61620 is used by Apache Cassandra's OpsCenter, a web-based tool used to manage and monitor Apache Cassandra clusters. Unrestricted inbound access to this port can potentially allow attackers to read or modify critical configuration data, execute arbitrary code, and even gain control of the OpsCenter and affect the overall availability of the Cassandra cluster.
Here are the remediation steps to ensure there is no unrestricted inbound access to TCP port 61620 (OpsCenter):
- Identify all systems that require access to the OpsCenter through TCP port 61620.
- Implement firewall rules and access control lists (ACLs) to block all incoming traffic to port 61620, except for authorized hosts or IP addresses that require access to the OpsCenter.
- Use a network security group (NSG) to filter traffic to the Cassandra cluster's network interface, and configure it to only allow traffic from authorized sources.
- Enable Transport Layer Security (TLS) encryption for all communication to and from the OpsCenter to protect against eavesdropping and man-in-the-middle attacks.
- Regularly monitor the network traffic to the Cassandra cluster to detect any unauthorized attempts to access the TCP port 61620.
- Regularly review and update the firewall rules, access control lists, and network security groups to ensure they are up to date and configured correctly.
By following these remediation steps, you can ensure that the Cassandra cluster is secured and that access to the TCP port 61620 is restricted only to authorized sources, reducing the risk of unauthorized access, data loss, and other security incidents.
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.