Audit Logs on CUCM Part 2

Author
William Bell
Vice President, Solutions and Products

Audit Logging

Simply stated, audit logging is a process on the Cisco UC appliance which is responsible for logging certain events to log files used specifically for auditing.  With CUCM, there are several audit logs:

  • Application Log
  • Database Log
  • Operating System Log
  • Remote Support Account Log

The above sources are tracked in separate log files written to the common partition.

Application Log

The application audit log can be used to track configuration changes and activities for the following applications/services:

  • CUCM administrative web pages
  • CUMC serviceability web pages
  • Command Line Interface
  • RTMT
  • Disaster Recovery System (DRS)
  • CDR Analysis and Reporting (CAR)

The application log was the focus of a previous blog article: Audit Logs on Cisco Unified Communications Manager.

Database Log

This log focuses on tracking database changes.  It can track changes to the schema, database updates, and database reads.  You actually can select administrative changes here, which will increase the level of audit information available for auditing admin level information.  So, clearly a little overlap between functions.

Database logging is configured using the Unified Serviceability pages.  This is same location used to configure the application audit log parameters.  These logs can be accessed from RTMT using the “Cisco Audit Logs/informixauditlogs” subfolder:

If you are looking for these files from the CLI:

admin:file list activelog audit/informixauditlogs/*
iecucm01_ccm7_1_3_32900_4.3817          iecucm01_ccm7_1_3_32900_4.3818
iecucm01_ccm7_1_3_32900_4.3819          iecucm01_ccm7_1_3_32900_4.3820
iecucm01_ccm7_1_3_32900_4.3821          iecucm01_ccm7_1_3_32900_4.3822
iecucm01_ccm7_1_3_32900_4.3823          iecucm01_ccm7_1_3_32900_4.3824
iecucm01_ccm7_1_3_32900_4.3825          iecucm01_ccm7_1_3_32900_4.3826
iecucm01_ccm7_1_3_32900_4.3827          iecucm01_ccm7_1_3_32900_4.3828
iecucm01_ccm7_1_3_32900_4.3829          iecucm01_ccm7_1_3_32900_4.3830
iecucm01_ccm7_1_3_32900_4.3831          iecucm01_ccm7_1_3_32900_4.3832
iecucm01_ccm7_1_3_32900_4.3833          iecucm01_ccm7_1_3_32900_4.3834
iecucm01_ccm7_1_3_32900_4.3835          iecucm01_ccm7_1_3_32900_4.3836
iecucm01_ccm7_1_3_32900_4.3837          iecucm01_ccm7_1_3_32900_4.3838
iecucm01_ccm7_1_3_32900_4.3839          iecucm01_ccm7_1_3_32900_4.3840
iecucm01_ccm7_1_3_32900_4.3841          iecucm01_ccm7_1_3_32900_4.3842

Operating System Log

The CUCM appliance OS, like any other, performs functions and runs routines in the background.  The activities of these functions and routines can be tracked via the system’s audit logging.  Interestingly enough, this audit log can only be enabled or disabled.  Further, you have to enable or disable it from the CLI.  For example:

admin:utils auditd enable

The auditd daemon has been started and was set to start upon reboot.

The OS audit log will show you when a process executes, what was executed,  the process ID, and other, somewhat cryptic information.

These logs can be accessed from RTMT using the “Cisco Audit Logs/vos” subfolder or from the CLI:

admin:file list activelog audit/vos/*
vos-audit.log
dir count = 0, file count = 1

Remote Support Accounting Log

So, there is a feature which allows Cisco TAC to logon to your OS platform and do some low level magic.  TAC can access the root shell and look/touch/modify things that standard admins cannot.  Remote support accounting tracks the CLI commands that are issued by the technical support teams.  You cannot enable/disable this auditing feature.  It is engaged automatically when the remote support account is enabled.

The logs themselves are stored in the same location as the operation system logs.

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Nick Kelly

Cybersecurity Engineer, Cisco

Nick has over 20 years of experience in Security Operations and Security Sales. He is an avid student of cybersecurity and regularly engages with the Infosec community at events like BSides, RVASec, Derbycon and more. The son of an FBI forensics director, Nick holds a B.S. in Criminal Justice and is one of Cisco’s Fire Jumper Elite members. When he’s not working, he writes cyberpunk and punches aliens on his Playstation.

 

Virgilio “BONG” dela Cruz Jr.

CCDP, CCNA V, CCNP, Cisco IPS Express Security for AM/EE
Field Solutions Architect, Tech Data

Virgilio “Bong” has sixteen years of professional experience in IT industry from academe, technical and customer support, pre-sales, post sales, project management, training and enablement. He has worked in Cisco Technical Assistance Center (TAC) as a member of the WAN and LAN Switching team. Bong now works for Tech Data as the Field Solutions Architect with a focus on Cisco Security and holds a few Cisco certifications including Fire Jumper Elite.

 

John Cavanaugh

CCIE #1066, CCDE #20070002, CCAr
Chief Technology Officer, Practice Lead Security Services, NetCraftsmen

John is our CTO and the practice lead for a talented team of consultants focused on designing and delivering scalable and secure infrastructure solutions to customers across multiple industry verticals and technologies. Previously he has held several positions including Executive Director/Chief Architect for Global Network Services at JPMorgan Chase. In that capacity, he led a team managing network architecture and services.  Prior to his role at JPMorgan Chase, John was a Distinguished Engineer at Cisco working across a number of verticals including Higher Education, Finance, Retail, Government, and Health Care.

He is an expert in working with groups to identify business needs, and align technology strategies to enable business strategies, building in agility and scalability to allow for future changes. John is experienced in the architecture and design of highly available, secure, network infrastructure and data centers, and has worked on projects worldwide. He has worked in both the business and regulatory environments for the design and deployment of complex IT infrastructures.