Remove entries in security group which allows Netbios(TCP port 139 and UDP ports 137, 138 ) access from public IP.

It is AWS best practice to remove entries in security group which allows Netbios access from public IP to reduce possibility of breach. Allowing unrestricted Netbios access can increase threats like man-in-the-middle attacks (MITM), Denial of Service (DoS) attacks or BadTunnel exploits.

Adopt Template

Trigger

Use this to initiate a workflow based on time, events or call.

Runs everyday

Resource

Select resources on which you want to work on.

Gets Security Groups in a specific AWS Region for EC2 service.

Filter

Enter parameters to filter resources in the workflow.

Filters the security group which allows Netbios(TCP port 139 and UDP ports 137, 138 ) access from public IP.

User Approval

Use this to get approval from stakeholder to continue the workflow.

Fulfils organizational obligation(if any) before taking any action on an AWS resource.

Action

Select action to be done on resources in the workflow.

Revoke Security Group Ingress in a specific AWS Region for EC2 service.
Adopt Template

Workflow Template

Trigger

Use this to initiate a workflow based on time, events or call.

Runs everyday

Resource

Select resources on which you want to work on.

Gets Security Groups in a specific AWS Region for EC2 service.

Filter

Enter parameters to filter resources in the workflow.

Filters the security group which allows Netbios(TCP port 139 and UDP ports 137, 138 ) access from public IP.

User Approval

Use this to get approval from stakeholder to continue the workflow.

Fulfils organizational obligation(if any) before taking any action on an AWS resource.

Action

Select action to be done on resources in the workflow.

Revoke Security Group Ingress in a specific AWS Region for EC2 service.

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