Send report of Security Groups which allows Netbios(TCP port 139 and UDP ports 137, 138 ) access from public IP.

24 Times Used
22 MAY 2019

It is AWS best practice to get aware of Security Groups 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.

Workflow Template

Gets Security Groups in a specific AWS Region for EC2 service.
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Notifies about the number of Security Groups allowing unrestricted access from internet on TCP port 139 and UDP ports 137,138(via Slack or email).
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Trigger

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Resource

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Filter

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Report

Generates report of selected resources

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