The ESXi host Secure Shell (SSH) daemon must set a timeout count on idle sessions.

An XCCDF Rule

Description

<VulnDiscussion>Setting a timeout ensures that a user login will be terminated as soon as the "ClientAliveCountMax" is reached.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>

ID: SV-258765r933356_rule
Severity: Low
References: CCI-000366
Updated: 8 months ago

From an ESXi shell, run the following command:

# esxcli system ssh server config set -k clientalivecountmax -v 3

or
From a PowerCLI command prompt while connected to the ESXi host, run the following commands:

$esxcli = Get-EsxCli -v2
$arguments = $esxcli.system.ssh.server.config.set.CreateArgs()
$arguments.keyword = 'clientalivecountmax'
$arguments.value = '3'
$esxcli.system.ssh.server.config.set.Invoke($arguments)

The ESXi host Secure Shell (SSH) daemon must set a timeout count on idle sessions.

Description

Remediation - Manual Procedure