Description

Port 27018 is the default port for mongod when running with--shardsvr command-line option or the shardsvr value for the clusterRole setting in a configuration file. It is a security risk to expose a DB port to the public internet even though they are on a secure socket layer. Anyone on the internet can run port scanning tools, determine the open ports and launch specific attacks. It is a best practice to block public access, restrict access from specific IP addresses to port 27018 and make the connection secure.

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  Recommended Mitigation

  It is recommended to replace the source IP of the rule with a specific IP address or delete the rule.