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V-240452

CAT II (Medium)

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

Rule ID

SV-240452r671097_rule

STIG

VMware vRealize Automation 7.x SLES Security Technical Implementation Guide

Version

V2R2

CCIs

CCI-000382

Discussion

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.

Check Content

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

Disable proxy NDP on the system.