Proxy Neighbor Discovery Protocol (NDP) must not be enabled on the system.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-240452	VRAU-SL-000655	SV-240452r671097_rule		Medium

Description
Proxy Neighbor Discovery Protocol (NDP) allows a system to respond to NDP requests on one interface on behalf of hosts connected to another interface. If this function is enabled when not required, addressing information may be leaked between the attached network segments.

STIG	Date
VMware vRealize Automation 7.x SLES Security Technical Implementation Guide	2023-09-22

Details

Check Text ( C-43685r671095_chk )
Note: For Appliance OS, proxy_ndp is disabled by default and this is not a finding. Determine if the system is configured for proxy NDP, and if it is enabled: more /proc/sys/net/ipv6/conf/*/proxy_ndp If the file is not found, the kernel is not configured for proxy NDP, and this is not a finding. If the file has a value of "0", proxy NDP is not enabled, and this is not a finding. If the file has a value of "1", proxy NDP is enabled, and this is a finding.

Check Text ( C-43685r671095_chk )

Note: For Appliance OS, proxy_ndp is disabled by default and this is not a finding.

Determine if the system is configured for proxy NDP, and if it is enabled:

more /proc/sys/net/ipv6/conf/*/proxy_ndp

If the file is not found, the kernel is not configured for proxy NDP, and this is not a finding.

If the file has a value of "0", proxy NDP is not enabled, and this is not a finding.

If the file has a value of "1", proxy NDP is enabled, and this is a finding.

Fix Text (F-43644r671096_fix)
Disable proxy NDP on the system.