NIST 800-53 AC-17

Remote Access

Return to master list of NIST 800-53 controls.


Automated Inspection items for NIST SP 800-53 AC-17 assessment.

Automated Inspection items are efficient enough that they can usually be part of a CA-7 Continuous Monitoring program on a daily (or in some cases hourly) basis, simultaneously meeting the requirements of RA-5 Vulnerability Scanning. While NIST 800-53 allows Continuous Monitoring results to be used for CA-2 Security Assessments and CA-4 Security Certification, a separate run using the same automated Inspection items in combination with more laborious items for CA-2 and CA-4 adds no significant burden.

Depending on FIPS 199 impact level and whether the Industrial Control Systems (ICS/SCADA) subset of 800-53 is chosen,  LJK/Security™ starter templates provide automated Inspection items as follows:

NIST SP 800-53 R2 AC-17(1)
Description  Automated Tests
Each terminal is enabled to hangup on logout.
(TERM,HANGUP,PROHIBITED)
(TERM,HANGUP,REQUIRED)
No Username is the target of proxy access from multiple users on a remote node.
(UAF,PROXY,MULTIUSER)
No proxy access is allowed from a wildcard node.
(UAF,PROXY,WILDNODE)
No proxy access is allowed from a wildcard user.
(UAF,PROXY,WILDUSER)
No proxy access is allowed to a non-existent username.
(UAF,PROXY,NOSUCHUSER)
No proxy access is allowed to a wildcard user.
(UAF,PROXY,WILDTARGET)
No unauthorized terminal is enabled for Dialup.
(TERM,DIALUP,PROHIBITED)
(TERM,DIALUP,REQUIRED)
No unauthorized terminal is enabled for modem support.
(TERM,MODEM,PROHIBITED)
(TERM,MODEM,REQUIRED)
No unauthorized terminal is set up to allow login.
(TERM,TYPEAHEAD,PROHIBITED)
(TERM,TYPEAHEAD,REQUIRED)
Poor Man's Routing is disabled.
(DECNET,FALPOOROUT,PROHIBITED)
(DECNET,FALPOOROUT,REQUIRED)
NIST SP 800-53 R2 AC-17(4)
Description  Automated Tests
Login to the SYSTEM username is allowed only for Batch jobs.
(VMS,SYSTEMLGI,PROHIBITED)
(VMS,SYSTEMLGI,REQUIRED)
Logins to privileged usernames shall not be permitted via DECnet SET HOST.
(UAF,PRIVLGIREM,ABSOLUTHI)
Logins to privileged usernames shall not be permitted via DECnet proxy.
(UAF,PRIVLGIPRX,ABSOLUTHI)
Logins to privileged usernames shall not be permitted via DECnet.
(UAF,PRIVLGINET,ABSOLUTHI)
Logins to privileged usernames shall not be permitted via LAT.
(UAF,PRIVLGILAT,ABSOLUTHI)
Logins to privileged usernames shall not be permitted via TCP.
(UAF,PRIVLGITCP,ABSOLUTHI)
Logins to privileged usernames shall not be permitted via X29.
(UAF,PRIVLGIX29,ABSOLUTHI)
Only specially exempted usernames have remote access for privileged functions.
(UAF,PRIVLEVEL,ACCESSMAX)

Interview questions for NIST SP 800-53 AC-17 assessment.

Interview questions are useful mainly for CA-2 Security Assessments and CA-4 Security Certification. For most environments they are too laborious to include in CA-7 Continuous Monitoring.

Depending on FIPS 199 impact level and whether the Industrial Control Systems (ICS/SCADA) subset of 800-53 is chosen,  LJK/Security™ starter templates provide Interview questions in the following groups:

Determination Statement Number Group Names
NIST SP 800-53 R2 AC-17
ASSSTAFF

Manual Inspection items for NIST SP 800-53 AC-17 assessment.

Manual Inspection items are useful mainly for CA-2 Security Assessments and CA-4 Security Certification. For most environments they are too laborious to include in CA-7 Continuous Monitoring.

Depending on FIPS 199 impact level and whether the Industrial Control Systems (ICS/SCADA) subset of 800-53 is chosen,  LJK/Security™ starter templates provide Manual Inspection items in the following groups:

Determination Statement Number Group Names
NIST SP 800-53 R2 AC-17
ASSESS
HARDWARE
POLICY
NIST SP 800-53 R2 AC-17(2)
POLICY
SYSTEM
NIST SP 800-53 R2 AC-17(3)
POLICY
NIST SP 800-53 R2 AC-17(4)
ASSESSMENT
POLICY

Manual Invasive Testing items for NIST SP 800-53 AC-17 assessment.

Manual Invasive Testing items are useful mainly for CA-2 Security Assessments and CA-4 Security Certification. For most environments they are too laborious to include in CA-7 Continuous Monitoring. The level of effort required and the degree of invasiveness are so high (in most cases making up for lack of Common Criteria evaluation) that arrangement as a Common Control is almost always a requirement for execution.

Depending on FIPS 199 impact level and whether the Industrial Control Systems (ICS/SCADA) subset of 800-53 is chosen,  LJK/Security™ starter templates provide Manual Invasive Testing items in the following groups:

Determination Statement Number Group Names
NIST SP 800-53 R2 AC-17(1)
TEST_VMS_LOGINACC
NIST SP 800-53 R2 AC-17(2)
TEST_ADD_CRYPTOINT
NIST SP 800-53 R2 AC-17(3)
TEST_ADD_MANAGED
NIST SP 800-53 R2 AC-17(4)
TEST_VMS_LOGINACC

Descriptions above apply to  LJK/Security™ Version 3.0.

The notation NIST SP 800-53 above refers in particular to NIST Special Publication 800-53 Revision 2.

Those NIST Special Publications specify security standards in support of FISMA for US Federal Government civil activities.

Return to master list of NIST 800-53 controls.


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