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V-258765

CAT III (Low)

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

Rule ID

SV-258765r933356_rule

STIG

VMware vSphere 8.0 ESXi Security Technical Implementation Guide

Version

V1R1

CCIs

CCI-000366

Discussion

Setting a timeout ensures that a user login will be terminated as soon as the "ClientAliveCountMax" is reached.

Check Content

From an ESXi shell, run the following command:

# esxcli system ssh server config list -k clientalivecountmax

or

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

$esxcli = Get-EsxCli -v2
$esxcli.system.ssh.server.config.list.invoke() | Where-Object {$_.Key -eq 'clientalivecountmax'}

Example result:

clientalivecountmax 3

If "clientalivecountmax" is not configured to "3", this is a finding.

Fix Text

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)