67 lines
3.1 KiB
PowerShell
67 lines
3.1 KiB
PowerShell
function Test-TeamsExternalAccess {
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[CmdletBinding()]
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[OutputType([CISAuditResult])]
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param (
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# Aligned
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# Parameters can be defined here if needed
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)
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begin {
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# Dot source the class script if necessary
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# . .\source\Classes\CISAuditResult.ps1
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# Initialization code, if needed
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$recnum = "8.2.1"
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}
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process {
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try {
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# 8.2.1 (L1) Ensure 'external access' is restricted in the Teams admin center
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#
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# Validate test for a pass:
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# - Confirm that the automated test results align with the manual audit steps outlined in the CIS benchmark.
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# - Specific conditions to check:
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# - Condition A: The `AllowTeamsConsumer` setting is `False`.
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# - Condition B: The `AllowPublicUsers` setting is `False`.
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# - Condition C: The `AllowFederatedUsers` setting is `False` or, if `True`, the `AllowedDomains` contains only authorized domain names.
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#
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# Validate test for a fail:
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# - Confirm that the failure conditions in the automated test are consistent with the manual audit results.
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# - Specific conditions to check:
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# - Condition A: The `AllowTeamsConsumer` setting is not `False`.
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# - Condition B: The `AllowPublicUsers` setting is not `False`.
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# - Condition C: The `AllowFederatedUsers` setting is `True` and the `AllowedDomains` contains unauthorized domain names or is not configured correctly.
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# Connect to Teams PowerShell using Connect-MicrosoftTeams
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$externalAccessConfig = Get-CISMSTeamsOutput -Rec $recnum
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$allowedDomainsLimited = $false
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if ($externalAccessConfig.AllowFederatedUsers -and $externalAccessConfig.AllowedDomains -and $externalAccessConfig.AllowedDomains.AllowedDomain.Count -gt 0) {
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$allowedDomainsLimited = $true
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}
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# Check if the configurations are as recommended
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$isCompliant = -not $externalAccessConfig.AllowTeamsConsumer -and -not $externalAccessConfig.AllowPublicUsers -and (-not $externalAccessConfig.AllowFederatedUsers -or $allowedDomainsLimited)
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# Create an instance of CISAuditResult and populate it
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$params = @{
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Rec = $recnum
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Result = $isCompliant
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Status = if ($isCompliant) { "Pass" } else { "Fail" }
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Details = "AllowTeamsConsumer: $($externalAccessConfig.AllowTeamsConsumer); AllowPublicUsers: $($externalAccessConfig.AllowPublicUsers); AllowFederatedUsers: $($externalAccessConfig.AllowFederatedUsers); AllowedDomains limited: $allowedDomainsLimited"
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FailureReason = if (-not $isCompliant) { "One or more external access configurations are not compliant." } else { "N/A" }
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}
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$auditResult = Initialize-CISAuditResult @params
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}
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catch {
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$LastError = $_
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$auditResult = Get-TestError -LastError $LastError -recnum $recnum
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}
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}
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end {
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# Return auditResult
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return $auditResult
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}
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}
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