|Platform: win2016||Date: (C)2017-08-03 (M)2017-10-16|
"Audit Policy: System: IPsec Driver"
This subcategory reports on the activities of the Internet Protocol security (IPsec) driver. Events for this subcategory include:
- 4960: IPsec dropped an inbound packet that failed an integrity check. If this problem persists, it could indicate a network issue or that packets are being modified in transit to this computer. Verify that the packets sent from the remote computer are the same as those received by this computer. This error might also indicate interoperability problems with other IPsec implementations.
- 4961: IPsec dropped an inbound packet that failed a replay check. If this problem persists, it could indicate a replay attack against this computer.
- 4962: IPsec dropped an inbound packet that failed a replay check. The inbound packet had too low a sequence number to ensure it was not a replay.
- 4963: IPsec dropped an inbound clear text packet that should have been secured. This is usually due to the remote computer changing its IPsec policy without informing this computer. This could also be a spoofing attack attempt.
- 4965: IPsec received a packet from a remote computer with an incorrect Security Parameter Index (SPI). This is usually caused by malfunctioning hardware that is corrupting packets. If these errors persist, verify that the packets sent from the remote computer are the same as those received by this computer. This error may also indicate interoperability problems with other IPsec implementations. In that case, if connectivity is not impeded, then these events can be ignored.
- 5478: IPsec Services has started successfully.
- 5479: IPsec Services has been shut down successfully. The shutdown of IPsec Services can put the computer at greater risk of network attack or expose the computer to potential security risks.
- 5480: IPsec Services failed to get the complete list of network interfaces on the computer. This poses a potential security risk because some of the network interfaces may not get the protection provided by the applied IPsec filters. Use the IP Security Monitor snap-in to diagnose the problem.
- 5483: IPsec Services failed to initialize RPC server. IPsec Services could not be started.
- 5484: IPsec Services has experienced a critical failure and has been shut down. The shutdown of IPsec Services can put the computer at greater risk of network attack or expose the computer to potential security risks.
- 5485: IPsec Services failed to process some IPsec filters on a plug-and-play event for network interfaces. This poses a potential security risk because some of the network interfaces may not get the protection provided by the applied IPsec filters. Use the IP Security Monitor snap-in to diagnose the problem.
Refer to the Microsoft Knowledgebase article "Description of security events in Windows Vista and in Windows Server 2008" for the most recent information about this setting: http://support.microsoft.com/kb/947226.
If audit settings are not configured, it can be difficult or impossible to determine what occurred during a security incident. However, if audit settings are configured so that events are generated for all activities the Security log will be filled with data and hard to use. Also, you can use a large amount of data storage as well as adversely affect overall computer performance if you configure audit settings for a large number of objects.
If failure auditing is used and the Audit: Shut down system immediately if unable to log security audits setting in the Security Options section of Group Policy is enabled, an attacker could generate millions of failure events such as logon failures in order to fill the Security log and force the computer to shut down, creating a Denial of Service. If security logs are allowed to be overwritten, an attacker can overwrite part or all of their activity by generating large numbers of events so that the evidence of their intrusion is overwritten.
Enable Audit policy settings that support the organizational security policy for all the computers in your organization. Identify the components that you need for an audit policy that enables your organization to hold users accountable for their actions while using organizational resources and enables IT departments to detect unauthorized activity efficiently and then track those events in log files.
If no audit settings are configured, or if audit settings are too lax on the computers in your organization, security incidents might not be detected or not enough evidence will be available for network forensic analysis after security incidents occur. However, if audit settings are too severe, critically important entries in the Security log may be obscured by all of the meaningless entries and computer performance and the available amount of data storage may be seriously affected. Companies that operate in certain regulated industries may have legal obligations to log certain events or activities.
(1) GPO: Computer Configuration\Windows Settings\Security Settings\Advanced Audit Policy Configuration\Audit Policies\System
(2) REG: No Registry Info
|SCAP Repo OVAL Definition||oval:org.secpod.oval:def:40296|