Checks/Aws/Test-Ec2InstancePortTelnetExposedToInternet.ps1

function Test-Ec2InstancePortTelnetExposedToInternet {
    <#
    .SYNOPSIS
        EC2 instance does not allow ingress from the Internet to TCP port 23 (Telnet)

    .DESCRIPTION
        EC2 instances with security groups allowing inbound **Telnet** on `TCP 23` from the Internet are identified, including open IPv4/IPv6 sources like `0.0.0.0/0` and `::/0`.
        
        Exposure is evaluated considering public IP assignment and subnet reachability.

    .PARAMETER Check
        CIEMCheck object containing check metadata.
    #>

    [CmdletBinding()]
    [OutputType([PSCustomObject[]])]
    param(
        [Parameter(Mandatory)]
        [CIEMCheck]$Check
    )

    $ErrorActionPreference = 'Stop'

    # TODO: Implement check logic based on Prowler check: ec2_instance_port_telnet_exposed_to_internet

    [CIEMScanResult]::Create($Check, 'MANUAL', 'This check requires manual implementation. See Prowler check ec2_instance_port_telnet_exposed_to_internet for reference.', 'N/A', 'ec2 Resources')
}