Application Layer Gateway Security Requirements Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
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SRG-NET-000015
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SRG-NET-000018
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The ALG must enforce approved authorizations for controlling the flow of information within the network based on attribute- and content-based inspection of the source, destination, headers, and/or content of the communications traffic.
Information flow control regulates where information is allowed to travel within a network. The flow of all network traffic must be monitored and controlled so it does not introduce any unacceptabl...Rule Medium Severity -
SRG-NET-000019
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The ALG must restrict or block harmful or suspicious communications traffic by controlling the flow of information between interconnected networks based on attribute- and content-based inspection of the source, destination, headers, and/or content of the communications traffic.
Information flow control regulates where information is allowed to travel within a network and between interconnected networks. Blocking or restricting detected harmful or suspicious communications...Rule Medium Severity -
SRG-NET-000019
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SRG-NET-000019
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The ALG that is part of a CDS must apply information flow control to data transferred between security domains by means of a policy filter which consists of a set of hardware and/or software.
Information flow control regulates where information is allowed to travel within a network and between interconnected networks. The flow of all network traffic must be monitored and controlled so i...Rule Medium Severity -
SRG-NET-000021
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The ALG that is part of a CDS must allow privileged administrators to enable/disable all security policy filters used to enforce information flow control.
A crucial part of any information flow control solution is the ability to enable and disable policy filters in order to respond to changes in organizational security posture and mission conditions....Rule Medium Severity -
SRG-NET-000022
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SRG-NET-000029
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The ALG that is part of a CDS must enforce dynamic traffic flow control based on organization-defined policies.
Information flow policies regarding dynamic information flow control include allowing or disallowing information flows based on changing conditions or mission/operational considerations. Changing c...Rule Medium Severity -
SRG-NET-000032
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The ALG that is part of a CDS must enforce organization-defined one-way information flows using hardware mechanisms.
Information flow control regulates where information is allowed to travel within a network and between interconnected networks. The flow of all network traffic must be monitored and controlled so i...Rule Medium Severity -
SRG-NET-000033
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The ALG that is part of a CDS must enforce information flow control using organization-defined security policy filters as a basis for flow control decisions for organization-defined information flows.
The use of security policy filters provides protection for the confidentiality of data by restricting the flow of data. Configure organization-defined specific filters and their order of execution...Rule Medium Severity -
SRG-NET-000041
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The ALG providing user access control intermediary services must display the Standard Mandatory DoD-approved Notice and Consent Banner before granting access to the network.
Display of a standardized and approved use notification before granting access to the network ensures privacy and security notification verbiage used is consistent with applicable federal laws, Exe...Rule Medium Severity -
SRG-NET-000042
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SRG-NET-000043
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The ALG providing user access control intermediary services for publicly accessible applications must display the Standard Mandatory DoD-approved Notice and Consent Banner before granting access to the system.
Display of a standardized and approved use notification before granting access to the publicly accessible network element ensures privacy and security notification verbiage used is consistent with ...Rule Medium Severity -
SRG-NET-000053
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SRG-NET-000061
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The ALG providing intermediary services for remote access communications traffic must ensure inbound and outbound traffic is monitored for compliance with remote access security policies.
Automated monitoring of remote access traffic allows organizations to detect cyber attacks and also ensure ongoing compliance with remote access policies by inspecting connection activities of remo...Rule Medium Severity -
SRG-NET-000062
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SRG-NET-000062
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The ALG that stores secret or private keys must use FIPS-approved key management technology and processes in the production and control of private/secret cryptographic keys.
Private key data is used to prove that the entity presenting a public key certificate is the certificate's rightful owner. Compromise of private key data allows an adversary to impersonate the key ...Rule Medium Severity -
SRG-NET-000062
Group -
The ALG that provides intermediary services for TLS must be configured to comply with the required TLS settings in NIST SP 800-52.
SP 800-52 provides guidance on using the most secure version and configuration of the TLS/SSL protocol. Using older unauthorized versions or incorrectly configuring protocol negotiation makes the g...Rule Medium Severity -
SRG-NET-000063
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The ALG providing intermediary services for remote access communications traffic must use NIST FIPS-validated cryptography to protect the integrity of remote access sessions.
Without cryptographic integrity protections, information can be altered by unauthorized users without detection. Remote access is access to DoD-nonpublic information systems by an authorized user ...Rule Medium Severity -
SRG-NET-000074
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SRG-NET-000075
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The ALG must produce audit records containing information to establish when (date and time) the events occurred.
Without establishing when events occurred, it is impossible to establish, correlate, and investigate the events leading up to an outage or attack. In order to compile an accurate risk assessment, ...Rule Medium Severity -
SRG-NET-000076
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SRG-NET-000077
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The ALG must produce audit records containing information to establish the source of the events.
Without establishing the source of the event, it is impossible to establish, correlate, and investigate the events leading up to an outage or attack. In order to compile an accurate risk assessment...Rule Medium Severity -
SRG-NET-000078
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The ALG must produce audit records containing information to establish the outcome of the events.
Without information about the outcome of events, security personnel cannot make an accurate assessment as to whether an attack was successful or if changes were made to the security state of the ne...Rule Medium Severity -
SRG-NET-000079
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The ALG must generate audit records containing information to establish the identity of any individual or process associated with the event.
Without information that establishes the identity of the subjects (i.e., users or processes acting on behalf of users) associated with the events, security personnel cannot determine responsibility...Rule Medium Severity -
SRG-NET-000088
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SRG-NET-000098
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SRG-NET-000099
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SRG-NET-000100
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The ALG must protect audit information from unauthorized deletion.
If audit data were to become compromised, then forensic analysis and discovery of the true source of potentially malicious system activity is impossible to achieve. To ensure the veracity of audit...Rule Medium Severity -
SRG-NET-000101
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The ALG must protect audit tools from unauthorized access.
Protecting audit data also includes identifying and protecting the tools used to view and manipulate log data. Therefore, protecting audit tools is necessary to prevent unauthorized operation on au...Rule Medium Severity -
SRG-NET-000102
Group
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