Gateway configuration at the remote VPN end-point is a not a mirror of the local gateway

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-17814	NET1808	SV-19063r1_rule		Medium

Description
The IPSec tunnel end points may be configured on the OOBM gateway routers connecting the managed network and the NOC. They may also be configured on a firewall or VPN concentrator located behind the gateway router. In either case, the crypto access-list used to identify the traffic to be protected must be a mirror (both IP source and destination address) of the crypto access list configured at the remote VPN peer.

Description

The IPSec tunnel end points may be configured on the OOBM gateway routers connecting the managed network and the NOC. They may also be configured on a firewall or VPN concentrator located behind the gateway router. In either case, the crypto access-list used to identify the traffic to be protected must be a mirror (both IP source and destination address) of the crypto access list configured at the remote VPN peer.

STIG	Date
Perimeter L3 Switch Security Technical Implementation Guide - Cisco	2018-11-28

Details

Check Text ( C-19020r1_chk )
Verify the configuration at the remote VPN end-point is a mirror configuration as that reviewed for the local end-point.

Fix Text (F-17724r1_fix)
Configure he crypto access-list used to identify the traffic to be protected so that it is a mirror (both IP source and destination address) of the crypto access list configured at the remote VPN peer.