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Disable SSH TCP Forwarding

An XCCDF Rule

Description

The AllowTcpForwarding parameter specifies whether TCP forwarding is permitted. To disable TCP forwarding, add or correct the following line in /etc/ssh/sshd_config:

AllowTcpForwarding no

Rationale

Leaving port forwarding enabled can expose the organization to security risks and back-doors.

ID
xccdf_org.ssgproject.content_rule_sshd_disable_tcp_forwarding
Severity
Medium
References
Updated



Remediation - Kubernetes Patch

apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
spec:
  config:
    ignition:
      version: 3.1.0