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Module 2: Managing and Monitoring Dynamic Host Configuration Protocol

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Module 2: Managing and Monitoring Dynamic Host Configuration Protocol. Overview ... Use 802.1X-enabled LAN switches or wireless access points to access the network ... – PowerPoint PPT presentation

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Title: Module 2: Managing and Monitoring Dynamic Host Configuration Protocol


1
Module 2 Managing and Monitoring Dynamic Host
Configuration Protocol
2
Overview
  • Managing a DHCP Database
  • Monitoring DHCP
  • Applying Security Guidelines for DHCP

3
Lesson Managing a DHCP Database
  • Overview of Managing DHCP
  • What Is a DHCP Database?
  • How a DHCP Database Is Backed Up and Restored
  • How a DHCP Database Is Reconciled
  • DHCP Server Configuration Options
  • Practice Managing a DHCP Database

4
Overview of Managing DHCP
The DHCP service needs to be managed to respond
to changes in the network
Scenarios for managing DHCP
  • Managing DHCP database growth
  • Protecting the DHCP database
  • Ensuring DHCP database consistency
  • Adding clients
  • Adding new network service servers
  • Adding new subnets

5
What Is a DHCP Database?
The DHCP database is a dynamic database that
contains configuration information
  • The DHCP database contains DHCP configuration
    data such as
  • Scopes
  • Address leases
  • Reservations
  • Windows Server 2003 stores the DHCP database in
    the folder Systemroot\System32\Dhcp
  • The DHCP database files include
  • Dhcp.mdb
  • Tmp.edb
  • J50.log and J50.log
  • Res.log
  • J50.chk

6
How a DHCP Database Is Backed Up and Restored
  • The DHCP service automatically backs up the DHCP
    database to the backup directory on the local
    drive
  • If the original database is unable to load, the
    DHCP service automatically restores from the
    backup directory on the local drive
  • The administrator moves a copy of the backed up
    DHCP database to an offline storage location

In the event that the server hardware fails, the
administrator can restore only from the offline
storage location
7
How a DHCP Database Is Reconciled
Detailed IP address lease information
DHCP Database
Compares and reconciles inconsistencies in the
DHCP Database
Registry
Summary IP address lease information
DHCP Server
8
DHCP Server Configuration Options
Additional DHCP server configuration options
include configuring
  • The console display options
  • DNS integration
  • DHCP server file locations
  • Conflict detection
  • Server connection bindings

The options are configured on the DHCP server
Properties tabs
9
Practice Managing a DHCP Database
  • In this practice, you will
  • Back up the DHCP database
  • Restore the DHCP database
  • Reconcile the DHCP database

10
Lesson Monitoring DHCP
  • Overview of Monitoring DHCP
  • Multimedia Creating a Performance Baseline
  • What Are DHCP Statistics?
  • What Is a DHCP Audit Log File?
  • How DHCP Audit Logging Works
  • Guidelines for Monitoring DHCP Server Performance
  • Guidelines for Creating Alerts for a DHCP Server
  • Practice Monitoring DHCP

11
Overview of Monitoring DHCP
Why monitor DHCP?
  • DHCP environment is dynamic
  • Determining DHCP server performance
  • Monitoring facilitates planning for current and
    future needs

DHCP data includes
  • DHCP statistics
  • DHCP events
  • DHCP performance data

12
Multimedia Creating a Performance Baseline
(Optional)
  • The objective of this presentation is to provide
    high-level steps for creating a performance
    baseline
  • After this presentation, you will better
    understand
  • The purpose of a performance baseline
  • A performance baseline is the level of system
    performance that you find acceptable
  • Server performance is critical to efficient
    network operations

13
What Are DHCP Statistics?
DHCP Server
DHCP statistics are collected at either the
server level or scope level
14
What Is a DHCP Audit Log File?
A DHCP audit log is a log of service-related
events
15
How DHCP Audit Logging Works
Audit logging is the daily collection of DHCP
server events into log files
1200 A.M.
3. DHCP closes daily audit log
1. DHCP opens daily audit log
DhcpSrvLog-Mon.log
DhcpSrvLog-Tue.log
2. DHCP performs disk checks
16
Guidelines for Monitoring DHCP Server Performance
  • Create a DHCP performance baseline
  • Check the standard counters for server performance
  • Review DHCP server counters for significant
    changes in DHCP traffic

17
Guidelines for Creating Alerts for a DHCP Server
  • Before creating an alert, define the range of
    acceptable performance
  • Use scripts with your alerts

18
Practice Monitoring DHCP
  • In this practice, you will
  • Monitor DHCP server performance by using the
    Performance console
  • Create an alert

19
Lesson Applying Security Guidelines for DHCP
  • Guidelines for Preventing an Unauthorized User
    from Obtaining a Lease
  • Guidelines for Restricting Unauthorized,
    Non-Microsoft DHCP Server from Leasing IP
    Addresses
  • Guidelines for Restricting Who Can Administer the
    DHCP Service
  • Guidelines for Securing the DHCP Database

20
Guidelines for Preventing an Unauthorized User
from Obtaining a Lease
To prevent an unauthorized user from obtaining a
lease
  • Ensure that unauthorized persons do not have
    physical or wireless access to your network
  • Enable audit logging for every DHCP server on
    your network
  • Regularly check and monitor audit log files
  • Use 802.1X-enabled LAN switches or wireless
    access points to access the network

21
Guidelines for Restricting Unauthorized,
Non-Microsoft DHCP Servers from Leasing IP
Addresses
DHCP authorization
  • Available on Windows 2000 and Windows Server 2003
  • Authorization not required on other DHCP
    implementations

To restrict an unauthorized, non-Microsoft DHCP
server from leasing IP addresses, ensure that
unauthorized persons do not have physical or
wireless access to your network
22
Guidelines for Restricting Who Can Administer the
DHCP Service
To restrict who can administer the DHCP service
  • Limit the members of the DHCP Administrators group
  • Add users needing read-only access to the DHCP
    Users group

23
Guidelines for Securing the DHCP Database
To further secure the DHCP database
  • Consider changing the default permissions of the
    DHCP folder
  • Provide only the minimum permissions that users
    require to perform their specific tasks
  • Provide Read permissions to users responsible for
    analyzing DHCP server log files
  • Remove Authenticated Users and Power Users to
    minimize access to the files in the DHCP folder

24
Lab Managing and Monitoring DHCP
  • In this lab, you will manage and monitor DHCP
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