Manual Chapter : Monitoring Web Application Security Activity

Applies To:

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BIG-IQ Centralized Management

  • 8.2.0, 8.1.0
Manual Chapter

Monitoring Web Application Security Activity

Monitoring Web Application Security

When Analytics is enabled on BIG-IQ, and AVR is provisioned on managed BIG-IP devices, you can view detailed insights about the traffic that violated your layer 7 security policies. Data can indicate the need for changes to the application service's Web Application Security (ASM) protection.
Policy management indicators can include, but are not limited to:
  • Policy enforcement settings: A security policy may be deployed in
    Transparent
    or
    Blocking
    enforcement modes. Depending on your environment you may want to change these settings following the application service's deployment.
  • Increased bad traffic: Drill down into traffic details, such as geolocation or malicious requests, or targeted URLs to identify sources of an attack. Based on these results, the security admin can enable strict enforcement for specific objects.
  • False Positives: Application service alerts of increased false positives may indicate that enforcement settings are too strict and need adjustment.
Centralized management supports statistics monitoring for AS3, Legacy, and Service Catalog application services. For more information about BIG-IP support for security information, see
Configuring Statistics Collection
in
BIG-IQ: Monitoring and Reports
at
support.f5.com
.
If you are running BIG-IP v13.0.8, or later, you are able to view the dynamic Web Application Security dashboards found on
Monitoring
DASHBOARDS
Web Application Security
. For more information about the information you can see in these dashboards, see
Monitoring Web Application Security Activity
.
To view traffic statistics for objects with Web Application Security policy protection, you must have the following settings configured.
  • A BIG-IQ data collection device configured for the BIG-IQ device
  • The BIG-IP device located in your network and running a compatible software version
  • Statistics collection enabled for managed BIG-IP devices
  • AVR provisioned on your BIG-IP devices

Web Application Security Charts

The charts that reflect Web Application Security data allow you to analyze current trends in traffic to applications with Web Application Security. The parameters found in the charts described display the detected layer 7 security threats, out of all HTTP traffic. Security information is available to AS3, Legacy, and Service Catalog application services.
To view data for a single application service, go to
Applications
APPLICATIONS
and select an application service. Once you select an application service, data for security can be found in charts when the Security icon is selected, as indicated in the image of an application service. To view Web Application Security data for all applications, go to
Monitoring
DASHBOARDS
Web Application Security
.
For general information about navigating the security charts and application services, see
Monitoring and Managing Applications Using BIG-IQ
on
support.f5.com
.
Illegal Transactions Rate (TPS)
The average number of illegal transactions per second that were identified by the Web Application Security profile. These transactions were detected based on the violation rating and your Web Application Security policy's action settings. Increases in illegal traffic over time can indicate an increase in attacks to your applications, or it can indicate an overly-strict protection policy. The current protection mode is indicated by Blocked or transparent transactions. You can use the
Violation Rating
dimension to filter violations above a certain threat level. This will allow you to identify specific violations types that were detected.
A single illegal transaction can include multiple violations. Therefore, comparing the number of illegal transactions vs the number of violations may not accurately reflect your system's status. It is recommended to primarily evaluate the number of illegal transactions.
Transactions Rate by Violation Rating (TPS)
The average number of transactions per second by the detected threat level assigned by your Web Application Security policy. The threat level of the traffic is shown in ascending order; from
Legal
to
Malicious
.
Top 6 Violations (Violations/s)
The six types of violations most commonly detected (per second). Violation information can be useful in adjusting your Web Application Security policy for optimized protection against the most common attacks.

Web Application Security Dimensions and Metrics

The metrics and dimensions listed are provide data regarding the transaction volume and traffic violations detected by your Web Application Security policy. The information provided is found in the dimensions pane tables with the screens that display Web Application Security data. You use this information to filter the on-screen data by specific dimension objects. For example, if you would like to view data that pertains to specific virtual servers, you can select specific virtual servers to filter only their data results. It is important note that all metric data is displayed as a unit over the time period selected for the screen.

Web Application Security Dimensions

The following defines the dimensions that provide traffic analytics for objects protected by a Web Application Security profile.
Some dimensions may not have listed objects, as information may not be available. For example, if your policy is in Transparent mode, or there are no reported attacks, there will be no data listed under the
Actions
dimension.
BIG-IP Host Names
The name of each BIG-IP system that processed the monitored transactions.
BIG-IP Blade Numbers
The individual blades (by number) for all monitored BIG-IP devices.
Applications
The name of each application reporting HTTP traffic data.
Application Services
The name of each HTTP application service reporting transaction data.
Virtual Servers
The name of each virtual server that processes monitored transactions.
ASM Policy Names
The names of the Web Application Security (ASM) policies that protect the virtual servers currently processing application traffic.
Actions
The enforcement applied to a detected attack signature. These actions include:
Learn
Alarm
Block
Violation Ratings
The rating assigned to traffic by the Web Application Security policy. The assigned ratings include:
Legal
, normal traffic that does not contain any threat indicators.
Legal (Staging)
, traffic that is tentatively detected as legal during the policy builder process. The relevant settings in the security policy are in staging.
Likely F.P.
, traffic may present a security threat, but is likely a false positive.
Illegal
, traffic that contains known violations, or abnormalities, that pose a threat to the application's performance.
Malicious
, traffic that contains known threat actors.
Network Protocols
The network protocol (HTTP, HTTPS) in the transaction.
Client IPs
The client IP address that initiated the HTTP request that was processed by the BIG-IP system.
Attack Types
The general category of application-layer attack, as identified by the Web Application Security policy.
Violations
The types of traffic violations, as detected by your Web Application Security policy.
Virus Names
The names of known viruses detected.
Client Device IDs
The unique identifier of the client’s device, derived from a JavaScript injection from BIG-IP to the client device.
IP Reputation
The IP categories configured for IP Intelligence. This dimension is relevant to users who have configured an ASM policy with IP Intelligence.
Countries
The country listed in the HTTP request that was processed by the BIG-IP system.
User Name
The client login name, based on information submitted from a login page. This information is available when Web Application Service is paired with Access service.
Session ID
The unique identifier of an HTTP session between the client and the application. This information is stored along with other client data, such as device ID.
URLs
The URL that initiated the HTTP request that was processed by the BIG-IP system.
Response Code Families
The class of the HTTP response result received by the BIG-IP system.
Methods
The HTTP method included in the HTTP request received by the BIG-IP system.

Web Application Security Metrics

HTTP metrics reflect the quantity, volume and speed of the HTTP traffic processed by your managed BIG-IP systems. Metric sets categorize the metric data according to an aspect of the traffic's progress throughout the transaction process. The table below defines the metric set and the kind of metric data collected.
Metric Set
Metric Set Definition
Metric
Metric Definition
Transactions
Each initiated request between the client and BIG-IP system, regardless of the outcome.
Depending on your configuration of Web Application Security, not all legal transactions are included in the transaction totals.
Avg/s
Average number of transactions per second that were processed by the BIG-IP system.
Total
Total number of transactions processed by the BIG-IP system.
Violations
The number of violations detected by the Web Application Security policy.
Avg/s
The average number of violations detected per second.
Total
The total number of violations detected over the selected period of time