421 4.7.1 Intrusion Prevention Active For
Paula Shuffleburg
Largely automated, IPS solutions help filter out malicious activity before it reaches other security devices or controls. This reduces the manual effort of security teams and allows other security products to perform more efficiently.
IPS solutions are also very effective at detecting and preventing vulnerability exploits. When a vulnerability is discovered, there is typically a window of opportunity for exploitation before a security patch can be applied. An intrusion prevention system is used here to quickly block these types of attacks.
IPS appliances were originally built and released as stand-alone devices in the mid-2000s. This functionality has been integrated into unified threat management (UTM) solutions as well as Next-Generation Firewalls. Next-generation IPS solutions are now connected to cloud-based computing and network services.
The IPS is placed inline, directly in the flow of network traffic between the source and destination. This is what differentiates IPS from its predecessor, the intrusion detection system (IDS). Conversely, IDS is a passive system that scans traffic and reports back on threats.
To protect against the increase of sophisticated and evasive threats, intrusion prevention systems should deploy inline deep learning. Inline deep learning significantly enhances detections and accurately identifies never-before-seen malicious traffic without relying on signatures.
Deep-learning models go through several layers of analysis and process millions of data points in milliseconds. These sophisticated pattern recognition systems analyze network traffic activity with unparalleled accuracy. Such systems can also identifying unknown malicious traffic inline with few false positives. This additional layer of intelligent protection provides further protection of sensitive information and prevents attacks that can paralyze an organization.
The Policies page provides a list of intrusion prevention rules. You can search for intrusion prevention rules, and open and edit rule properties. In the list, rules are grouped by application type, and some rule properties appear in different columns.
The TippingPoint column contains the equivalent Trend Micro TippingPoint rule ID. In the Advanced Search for intrusion prevention, you can search on the TippingPoint rule ID. You can also see the TippingPoint rule ID in the list of assigned intrusion prevention rules in the policy and computer editor.
The Rule Availability column provides information about the available license types for the rule. Endpoint & Workload indicates this rule can be assigned under both Endpoint Security and Workload Security licenses. Workload rule availability means the rule can only be assigned when the license type is Workload.
The license type is Endpoint if all of the assigned rules have Endpoint & Workload rule availability, and it is Workload if at least one of the assigned rules has Workload rule availability.
Intrusion Prevention Rules from Trend Micro are not directly editable through Workload Security. Instead, if the Intrusion Prevention Rule requires (or allows) configuration, those configuration options are available on the Configuration tab. Custom Intrusion Prevention Rules that you write yourself are editable, in which case the Rules tab is visible.
Rules that Trend Micro provides can include information about the vulnerability against which the rule protects. When applicable, the Common Vulnerability Scoring System (CVSS) is displayed. For information on this scoring system, see the CVSS page at the National Vulnerability Database.
To apply intrusion prevention rules during agent scans, you assign them to the appropriate policies and computers. When the rule is no longer necessary because the vulnerability has been patched you can unassign the rule.
If you cannot unassign intrusion prevention rules from a Computer editor, it is likely because the rules are currently assigned in a policy. Rules assigned at the policy level must be removed using the Policy editor and cannot be removed at the computer level.
When you make a change to a policy, it affects all computers using the policy. For example, when you unassign a rule from a policy you remove the rule from all computers that are protected by that policy. To continue to apply the rule to other computers, create a new policy for that group of computers. See Policies, inheritance, and overrides.
Additionally, there is a subset of Intrusion Prevention Rules to ensure protection against known vulnerability issues called core Endpoint & Workload rules. These rules are available for all license types, and can be easily assigned and unassigned altogether:
You should enable this with the Endpoint Security license; and turn this feature off and use Recommendation scans With the Workload Security license, disable this and instead use Recommendation scans.
Security updates can include new or updated application types and intrusion prevention rules which require the assignment of secondary intrusion prevention rules. Workload Security can automatically assign these rules if they are required. You enable these automatic assignments in the the policy or computer properties.
Note that Workload Security can display X-Forwarded-For headers in intrusion prevention events when they are available in the packet data. This information can be useful when the agent is behind a load balancer or proxy. The X-Forwarded-For header data appears in the event's Properties window. To include the header data, include packet data in the log. In addition, rule 1006540 Enable X-Forwarded-For HTTP Header Logging must be assigned.
Since it would be impractical to record all packet data every time a rule triggers an event, Workload Security records the data only the first time the event occurs within a specified period of time. The default time is five minutes, however you can change the time period using the Period for Log only one packet within period property of a policy's Advanced Network Engine settings. See Advanced Network Engine Options.
Some intrusion prevention rules that Trend Micro provides have one or more configuration options such as header length, allowed extensions for HTTP, or cookie length. Some options require you to configure them. If you assign a rule without setting a required option, an alert is generated that informs you about the required option. This also applies to any rules that are downloaded and automatically applied by way of a Security Update.
Schedule a time during which an intrusion prevention rule is active. Intrusion prevention rules that are active only at scheduled times appear in the Intrusion Prevention Rules page with a small clock over their icon .
Set the behavior mode of an intrusion prevention rule to Detect when testing new rules. In Detect mode, the rule creates a log entry prefaced with the words "detect only:" and does not interfere with traffic. Some intrusion prevention rules are designed to operate only in Detect mode. For these rules, you cannot change the behavior mode.
From a Computer or Policy editor, you can edit an intrusion prevention rule so that your changes apply only in the context of the policy or computer. You can also edit the rule so that the changes apply globally so that the changes affect other policies and computers that are assigned the rule. Similarly, you can configure application types for a single policy or computer, or globally.
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If you cannot unassign intrusion prevention rules from a Computer editorTo open the Computer editor, go to the Computers page and double-click the computer that you want to edit (or select the computer and click Details)., it is likely because the rules are currently assigned in a policy. Rules assigned at the policy level must be removed using the Policy editorTo open the Policy editor, go to the Policies page and double-click the policy that you want to edit (or select the policy and click Details). and cannot be removed at the computer level.
Schedule a time during which an intrusion prevention rule is active. Intrusion prevention rules that are active only at scheduled times appear in the Intrusion Prevention Rules page with a small clock over their icon .
From a Computer or Policy editorYou can change these settings for a policy or for a specific computer.To change the settings for a policy, go to the Polices page and double-click the policy that you want to edit (or select the policy and click Details).To change the settings for a computer, go to the Computers page and double-click the computer that you want to edit (or select the computer and click Details). , you can edit an intrusion prevention rule so that your changes apply only in the context of the policy or computer. You can also edit the rule so that the changes apply globally so that the changes affect other policies and computers that are assigned the rule. Similarly, you can configure application types for a single policy or computer, or globally.
An intrusion prevention system (IPS) is an automated network protection device used to monitor and respond to potential threats. Like an intrusion detection system (IDS), an IPS determines possible threats by examining network traffic. Because an exploit may be carried out very quickly after an attacker gains access, intrusion prevention systems administer an automated response to a threat, based on rules established by the network administrator.
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