Azure_VirtualNetworks_150

VirtualMachine with service Telnet (TCP:23) is exposed to the entire internet

Description

Services and databases store data that may be sensitive, protected by law, subject to regulatory requirements or compliance standards. It is highly recommended that access to data will be restricted to encrypted protocols. This rule detects network settings that may expose data via unencrypted protocol over the public internet or to a too wide local scope.

Remediation

Limit the access scope for Prevalent known internal port to only allow access in internal networks and limited scope.

If public interface exists, remove it and limit the access scope within the VNET only to applications or instances that requires access.

See https://docs.microsoft.com/en-us/azure/virtual-network/network-security-groups-overview

Service

Networking

Severity

High

Compliance

Mapping

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