Ensure that Microsoft Azure network security groups (NSGs) do not allow unrestricted access on TCP port 443 in order to protect against attackers that use brute force methods to gain access to Azure virtual machines associated with these NSGs. Hypertext Transfer Protocol Secure (HTTPS) is a secure extension of the HTTP protocol TLS/SSL and the primary communication protocol used in web browsers.
This rule resolution is part of the Conformity Security & Compliance tool for Azure.
Allowing unrestricted access to your Azure virtual machines (VMs) via network security groups (NSGs) can increase opportunities for malicious activities such as hacking, denial-of-service (DoS) attacks and loss of data.
Audit
To determine if your Azure network security groups allow unrestricted access on TCP port 443, perform the following actions:
Remediation / Resolution
To update your Azure NSG rule(s) configuration in order to restrict HTTPS access to trusted entities only, such as admin IP addresses or IP ranges, perform the following actions:
References
- Azure Official Documentation
- Azure network security overview
- Network security groups
- Create, change, or delete a network security group
- Azure best practices for network security
- Azure PowerShell Documentation
- az mysql server
- az network nsg list
- az network nsg rule list
- az network nsg rule update
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You are auditing:
Check for Unrestricted HTTPS Access
Risk Level: High