The Sentry must be configured to prohibit or restrict the use of functions, ports, protocols, and/or services, as defined in the PPSM CAL and vulnerability assessments.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-251022	MOIS-AL-000360	SV-251022r802288_rule		Medium

Description
In order to prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e., embedding of data types within data types); organizations must disable or restrict unused or unnecessary physical and logical ports/protocols on information systems. ALGs are capable of providing a wide variety of functions and services. Some of the functions and services provided by default may not be necessary to support essential organizational operations. DoD continually assesses the ports, protocols, and services that can be used for network communications. Some ports, protocols or services have known exploits or security weaknesses. Network traffic using these ports, protocols, and services must be prohibited or restricted in accordance with DoD policy. The ALG is a key network element for preventing these non-compliant ports, protocols, and services from causing harm to DoD information systems. The network ALG must be configured to prevent or restrict the use of prohibited ports, protocols, and services throughout the network by filtering the network traffic and disallowing or redirecting traffic as necessary. Default and updated policy filters from the vendors will disallow older version of protocols and applications and will address most known non-secure ports, protocols, and/or services. However, sources for further policy filters are the IAVMs and the PPSM requirements. Satisfies: SRG-NET-000132-ALG-000087, SRG-NET-000512-ALG-000062

Description

In order to prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e., embedding of data types within data types); organizations must disable or restrict unused or unnecessary physical and logical ports/protocols on information systems. ALGs are capable of providing a wide variety of functions and services. Some of the functions and services provided by default may not be necessary to support essential organizational operations. DoD continually assesses the ports, protocols, and services that can be used for network communications. Some ports, protocols or services have known exploits or security weaknesses. Network traffic using these ports, protocols, and services must be prohibited or restricted in accordance with DoD policy. The ALG is a key network element for preventing these non-compliant ports, protocols, and services from causing harm to DoD information systems. The network ALG must be configured to prevent or restrict the use of prohibited ports, protocols, and services throughout the network by filtering the network traffic and disallowing or redirecting traffic as necessary. Default and updated policy filters from the vendors will disallow older version of protocols and applications and will address most known non-secure ports, protocols, and/or services. However, sources for further policy filters are the IAVMs and the PPSM requirements. Satisfies: SRG-NET-000132-ALG-000087, SRG-NET-000512-ALG-000062

STIG	Date
Ivanti MobileIron Sentry 9.x ALG Security Technical Implementation Guide	2021-09-16

Details

Check Text ( C-54457r802286_chk )
View the configuration and vendor documentation of the Sentry application to find the minimum ports, protocols, and services required for Sentry operation. 1. Log in to MobileIron Sentry System Manager. 2. Go to Security >> Access Control Lists >> ACLs. 3. Check all the ACLs to determine if the service restricted has an ACL already available. If it does not, this is a finding.

Fix Text (F-54411r802287_fix)
Disable ports, protocols, and/or services not required for Sentry operation. 1. Log in to the Standalone Sentry System Manager. 2. Go to Security >> Access Control Lists >> ACLs. 3. Check all the ACLs to determine if the service restricted has an ACL already available. If it does not, click "Add". 4. In the "Name" field, enter a name to identify the ACL. 5. In the "Description" field, enter text to clarify the purpose of the ACL. 6. Click "Save". 7. Select the new ACL created and click it, which should open a "Modify ACL" dialog box. 8. Click "Add" to add an access control entry (ACE) to the ACL. Each ACE consists of a combination of the network hosts and services configured for use in ACLs. 9. Use the following guidelines to complete the form: Source Network Destination Network Service Action - Select Permit or Deny from the drop-down list. Connections Per Minute 10. Click "Apply".

Fix Text (F-54411r802287_fix)

Disable ports, protocols, and/or services not required for Sentry operation.

1. Log in to the Standalone Sentry System Manager.
2. Go to Security >> Access Control Lists >> ACLs.
3. Check all the ACLs to determine if the service restricted has an ACL already available. If it does not, click "Add".
4. In the "Name" field, enter a name to identify the ACL.
5. In the "Description" field, enter text to clarify the purpose of the ACL.
6. Click "Save".
7. Select the new ACL created and click it, which should open a "Modify ACL" dialog box.
8. Click "Add" to add an access control entry (ACE) to the ACL. Each ACE consists of a combination of the network hosts and services configured for use in ACLs.
9. Use the following guidelines to complete the form:
Source Network
Destination Network
Service
Action - Select Permit or Deny from the drop-down list.
Connections Per Minute
10. Click "Apply".