The ESXi host Secure Shell (SSH) daemon must set a timeout count on idle sessions.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| low | V-258765 | SRG-OS-000480-VMM-002000 | ESXI-80-000210 | SV-258765r933356_rule | 2023-10-11 | 1 |
Description
Setting a timeout ensures that a user login will be terminated as soon as the "ClientAliveCountMax" is reached.
ℹ️ Check
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
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)