FortiSIEM Microsoft DHCP (2003, 2008) Configuration

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Microsoft DHCP (2003, 2008) Configuration

What is Discovered and Monitored

Enabling SNMP on Windows Server 2003

Enabling SNMP on Windows 7 or Windows Server 2008 R2

Creating a Generic User Who Does Not Belong to the Local Administrator Group

Creating a User Who Belongs to the Domain Administrator Group

Settings for Access Controls

What is Discovered and Monitored

Protocol Information discovered Metrics collected Used for
SNMP Process details Process level CPU utilization, Memory utilization Performance Monitoring
WMI Process details,

process to service mappings

 Process level metrics (Win32_Process, Win32_PerfRawData_PerfProc_Process): uptime, CPU utilization, Memory utilization, Read I/O, Write I/O

DHCP metrics (Win32_PerfFormattedData_DHCPServer_DHCPServer): DHCP request rate, release rate, decline rate, Duplicate Drop rate, Packet Rate, Active Queue length, DHCP response time, Conflict queue length

 Performance Monitoring
Syslog Application type DHCP address release/renew events that are used by AccelOps for Identity and location:

attributes include IP Address, MAC address, Host Name

 Security and compliance (associate machines to IP addresses)

Event Types

In CMDB > Event Types, search for “microsoft dhcp” in the Description column to see the event types associated with this device.

Rules

There are no predefined rules for this device.

Reports

There are no predefined reports for this device.

Configuration

SNMP

Enabling SNMP on Windows Server 2003

SNMP is typically enabled by default on Windows Server 2003, but you will still need to add AccelOps to the hosts that are authorized to accept SNMP packets. First you need to make sure that the SNMP Management tool has been enabled for your device.

  1. In the Start menu, go to Administrative Tools > Services.
  2. Go to Control Panel > Add or Remove Programs.
  3. Click Add/Remove Windows Components.
  4. Select Management and Monitoring Tools and click Details.

Make sure that Simple Network Management Tool is selected.

If it isn’t selected, select it, and then click Next to install.

  1. Go to Start > Administrative Tools > Services.
  2. Select and open SNMP Service.
  3. Click the Security
  4. Select Send authentication trap.
  5. Under Accepted communities, make sure there is an entry for public that is set to read-only.
  6. Select Accept SNMP packets from these hosts.
  7. Click
  8. Enter the IP address for your AccelOps virtual appliance that will access your device over SNMP.
  9. Click Add.
  10. Click Apply.
  11. Under SNMP Service, click Restart service.

Enabling SNMP on Windows 7 or Windows Server 2008 R2

SNMP is typically enabled by default on Windows Server 2008, but you will still need to add AccelOps to the hosts that are authorized to accept SNMP packets. First you should check that SNMP Services have been enabled for your server.

  1. Log in to the Windows 2008 Server where you want to enable SNMP as an administrator.
  2. In the Start menu, select Control Panel.
  3. Under Programs, click Turn Windows features on/off.
  4. Under Features, see if SNMP Services is installed.

If not, click Add Feature, then select SMNP Service and click Next to install the service.

  1. In the Server Manager window, go to Services > SNMP Services.
  2. Select and open SNMP Service.
  3. Click the Security
  4. Select Send authentication trap.
  5. Under Accepted communities, make sure there is an entry for public that is set to read-only.
  6. Select Accept SNMP packets from these hosts.
  7. Click
  8. Enter the IP address for your AccelOps virtual appliance that will access your device over SNMP.
  9. Click Add.
  10. Click Apply.
  11. Under SNMP Service, click Restart service.

WMI

Configuring WMI on your device so AccelOps can discover and monitor it requires you to create a user who has access to WMI objects on the device. There are two ways to do this:

Creating a Generic User Who Does Not Belong to the Local Administrator Group

Creating a User Who Belongs to the Domain Administrator Group

Creating a Generic User Who Does Not Belong to the Local Administrator Group

Log in to the machine you want to monitor with an administrator account.

Enable Remote WMI Requests by Adding a Monitoring Account to the Distributed COM Users Group and the Performance Monitor Users Group

  1. Go to Start > Control Panel > Administrative Tools > Computer Management > Local Users and Groups.
  2. Right-click Users and select Add User.
  3. Create a user.
  4. Go to Groups, right-click Distributed COM Users, and then click Add to group.
  5. In the Distributed COM Users Properties dialog, click Add.
  6. Find the user you created, and then click OK.

This is the account you will need to use in setting up the Performance Monitor Users group permissions.

  1. Click OK in the Distributed COM Users Properties dialog, and then close the Computer Management dialog.
  2. Repeat steps 4 through 7 for the Performance Monitor Users group. Enable DCOM Permissions for the Monitoring Account
  3. Go to Start > Control Panel > Administrative Tools > Component Services.
  4. Right-click My Computer, and then Properties.
  5. Select the COM Security tab, and then under Access Permissions, click Edit Limits.
  6. Make sure that the Distributed COM Users group and the Performance Monitor Users group have Local Access and Remote Access set to
  7. Click OK.
  8. Under Access Permissions, click EditDefault.
  9. Make sure that the Distributed COM Users group and the Performance Monitor Users group have Local Access and Remote Access set to
  10. Click
  11. Under Launch and Activation Permissions, click Edit Limits.
  12. Make sure that the Distributed COM Users group and the Performance Monitor Users group have the permissions Allow for Local Launch, Remote Launch, Local Activation, and Remote Activation.
  13. Click OK.
  14. Under Launch and Activation Permissions, click Edit Defaults.
  15. Make sure that the Distributed COM Users group and the Performance Monitor Users group have the permissions Allow for Local Launch, Remote Launch, Local Activation, and Remote Activation.

See the sections on Enabling WMI Privileges and Allowing WMI Access through the Windows Firewall in the Domain Admin User set up instructions for the remaining steps to configure WMI.

Creating a User Who Belongs to the Domain Administrator Group

Log in to the Domain Controller with an administrator account.

Enable remote WMI requests by Adding a Monitoring Account to the Domain Administrators Group

  1. Go to Start > Control Pane > Administrative Tools > Active Directory Users and Computers > Users.
  2. Right-click Users and select Add User.
  3. Create a user for the @accelops.com domain.

For example, YJTEST@accelops.com.

  1. Go to Groups, right-click Administrators, and then click Add to Group.
  2. In the Domain Admins Properties dialog, select the Members tab, and then click Add.
  3. For Enter the object names to select, enter the user you created in step 3.
  4. Click OK to close the Domain Admins Properties dialog.
  5. Click OK.

Enable the Monitoring Account to Access the Monitored Device

Log in to the machine you want to monitor with an administrator account. Enable DCOM Permissions for the Monitoring Account

  1. Go to Start > Control Panel > Administrative Tools > Component Services.
  2. Right-click My Computer, and then select Properties.
  3. Select the Com Security tab, and then under Access Permissions, click Edit Limits.
  4. Find the user you created for the monitoring account, and make sure that user has the permission Allow for both Local Access and Re mote Access.
  5. Click OK.
  6. In the Com Security tab, under Access Permissions, click Edit Defaults.
  7. Find the user you created for the monitoring account, and make sure that user has the permission Allow for both Local Access and Re mote Access.
  8. Click OK.
  9. In the Com Security tab, under Launch and Activation Permissions, click Edit Limits.
  10. Find the user you created for the monitoring account, and make sure that user has the permission Allow for Local Launch, Remote Launch, Local Activation, and Remote Activation.
  11. In the Com Security tab, under Launch and Activation Permissions, click Edit Defaults.
  12. Find the user you created for the monitoring account, and make sure that user has the permission Allow for Local Launch, Remote Launch, Local Activation, and Remote Activation.

Enable Account Privileges in WMI

The monitoring account you created must have access to the namespace and sub-namespaces of the monitored device.

  1. Go to Start > Control Panel > Administrative Tools > Computer Management > Services and Applications.
  2. Select WMI Control, and then right-click and select Properties.
  3. Select the Security
  4. Expand the Root directory and select CIMV2.
  5. Click Security.
  6. Find the user you created for the monitoring account, and make sure that user has the permission Allow for Enable Account and Remot e Enable.
  7. Click Advanced.
  8. Select the user you created for the monitoring account, and then click Edit.
  9. In the Apply onto menu, select This namespace and subnamespaces.
  10. Click OK to close the Permission Entry for CIMV2 dialog.
  11. Click OK to close the Advanced Security Settings for CIMV2 dialog.
  12. In the left-hand navigation, under Services and Applications, select Services.
  13. Select Windows Management Instrumentation, and then click Restart. Allow WMI to Connect Through the Windows Firewall (Windows 2003)
  14. In the Start menu, select Run.
  15. Run msc.
  16. Go to Local Computer Policy > Computer Configuration > Administrative Templates > Network > Network Connections > Windows Firewall.
  17. Select Domain Profile or Standard Profile depending on whether the device you want to monitor is in the domain or not.
  18. Select Windows Firewall: Allow remote administration exception.
  19. Run exe and enter these commands:
  20. Restart the server.

Allow WMI through Windows Firewall (Windows Server 2008, 2012)

  1. Go to Control Panel > Windows Firewall.
  2. In the left-hand navigation, click Allow a program or feature through Windows Firewall.
  3. Select Windows Management Instrumentation, and the click OK.

You can now configure AccelOps to communicate with your device by following the instructions in Setting Access Credentials for Device Discovery, and then initiate discovery of the device as described in the topics in Discovering Infrastructure.

Syslog

  1. Log into your Microsoft DHCP server as an administrator.
  2. Go to Start > Administrative Tools > DHCP.
  3. Select the DHCP server you want to monitor, then right-click and select Properties.
  4. Click the General tab, and then select Enable DHCP audit logging.
  5. Click the DNS tab, and then select Dynamically update DNS A and PTR records only if requested by the DHCP clients and Discard A and PTR records when lease is deleted.
  6. Click the Advanced
  7. Set Audit log file path to C:\WINDOWS\system32\dhcp.
  8. Set Database path to C:\\WINDOWS\system32\dhcp.
  9. Set Backup path to C:\\WINDOWS\System32\dhcp\backup.
  10. Clock OK to complete configuration.

Use the Windows Agent Manager to further configure sending syslogs from your device to AccelOps.

  1. Sample Microsoft DHCP Syslog

<15>May 27 17:22:43 ADS-Pri.ACME.net WinDHCPLog 0

11,05/27/08,17:22:43,Renew,192.168.20.46,Lucy-XPS.ACME.net,009096F27636,

<15>Jun 20 12:20:58 ADS-Pri.ACME.net WinDHCPLog 0

10,06/20/08,12:20:58,Assign,192.168.20.35,mission.,000D5639076C,

<13>Mar 29 10:25:28 192.168.0.10 WinDHCPLog 0

30,03/29/10,10:25:27,DNS Update

Request,40.20.168.192,John-lap.ACME.net,,

<13>Mar 29 10:25:05 192.168.0.10 WinDHCPLog 0

32,03/29/10,10:25:01,DNS Update

Successful,192.168.20.32,Mary-laptop.ACME.net,,

<13>Jun  1 14:24:08 192.168.0.10 WinDHCPLog 0 31,06/01/10,14:24:08,DNS

Update Failed,192.168.26.31,Joe-LAPTOP.ACME.net,-1,  <13>Jun  1 14:24:08 192.168.0.10 WinDHCPLog 0 25,06/01/10,14:24:07,0 leases expired and 1 leases deleted,,,,

This entry was posted in Administration Guides, FortiSIEM on by .

About Mike

Michael Pruett, CISSP has a wide range of cyber-security and network engineering expertise. The plethora of vendors that resell hardware but have zero engineering knowledge resulting in the wrong hardware or configuration being deployed is a major pet peeve of Michael's. This site was started in an effort to spread information while providing the option of quality consulting services at a much lower price than Fortinet Professional Services. Owns PacketLlama.Com (Fortinet Hardware Sales) and Office Of The CISO, LLC (Cybersecurity consulting firm).

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