The VPN Gateway must renegotiate the IKE security association after eight hours or less.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-207238	SRG-NET-000337-VPN-001300	SV-207238r962236_rule		Medium

Description
When a VPN gateway creates an IPsec Security Association (SA), resources must be allocated to maintain the SA. These resources are wasted during periods of IPsec endpoint inactivity, which could result in the gateway’s inability to create new SAs for other endpoints, thereby preventing new sessions from connecting. The Internet Key Exchange (IKE) idle timeout may also be set to allow SAs associated with inactive endpoints to be deleted before the SA lifetime has expired, although this setting is not recommended.

Description

When a VPN gateway creates an IPsec Security Association (SA), resources must be allocated to maintain the SA. These resources are wasted during periods of IPsec endpoint inactivity, which could result in the gateway’s inability to create new SAs for other endpoints, thereby preventing new sessions from connecting. The Internet Key Exchange (IKE) idle timeout may also be set to allow SAs associated with inactive endpoints to be deleted before the SA lifetime has expired, although this setting is not recommended.

STIG	Date
Virtual Private Network (VPN) Security Requirements Guide	2024-04-09

Details

Check Text ( C-7498r962226_chk )
Verify the VPN Gateway renegotiates the IKE security association after eight hours or less. If the VPN Gateway does not renegotiate the IKE security association after eight hours or less, this is a finding.

Fix Text (F-7498r962227_fix)
Configure the VPN Gateway to renegotiate the IKE security association after eight hours or less.