The ESXi host Secure Shell (SSH) daemon must disable port forwarding.

An XCCDF Rule

Description

<VulnDiscussion>While enabling Transmission Control Protocol (TCP) tunnels is a valuable function of sshd, this feature is not appropriate for use on the ESXi hypervisor.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>

ID: SV-258785r933416_rule
Severity: Medium
References: CCI-000366
Updated: 8 months ago

From an ESXi shell, run the following command:

# esxcli system ssh server config set -k allowtcpforwarding -v no

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 = 'allowtcpforwarding'
$arguments.value = 'no'
$esxcli.system.ssh.server.config.set.Invoke($arguments)

The ESXi host Secure Shell (SSH) daemon must disable port forwarding.

Description

Remediation - Manual Procedure