Transcript Intro

Chapter 4 Overview

Configure client/server components
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Network interface card (NIC)
Windows 95
Windows NT (similar to Windows 2000)
TCP/IP
SNMP mgmt agents
Microsoft networks
Discussion of NetBIOS, DNS, etc.
Chapter 4  Configuration: Client/Server Components
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Why Configuration?

Analogy to telephone system
o Network components like telephone hardware
o Network configuration is like “getting everyone
to speak the same language”

Network configuration necessary since
o Not all components are plug and play
o Networks are heterogeneous (different
hardware, OSs, applications, protocols, etc.)
Chapter 4  Configuration: Client/Server Components
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Configuration

Documentation is important
o “The time it takes to troubleshoot a network is
usually inversely proportional to the care taken
in documenting device configuration”

What to configure?
o Protocol stack (configured when OS is installed)
o For network mgmt, must enable SNMP
o In the past even the NIC had to be configured
(today, plug and play)
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WAN
PSTN
LAN
The LAN
used in
Textbook
ROUTER
10BASE2 Segment
HU B
PROBE 2
SWITCH 2
WS 2
SERVER
Router
SWITCH 1
NMS
PROBE 1
WS 1
SUBNET 2
SUBNET 1
Probe = Remote Monit or
WS = Workstation
PSTN = Publi c Switched Telephone
Network
NMS = Network Manage ment System
= ne twork links
= manage ment link s
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Asynchronous Communication

Each external device has a unique
combination of interrupt request (IRQ)
number and I/O address
o These determine interrupt handler to call
o Limited number of IRQs available

Must avoid conflicts
o In past, admin had to configure these
o Today, plug and play
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Network Interface Card

Consider Ethernet adapter
o IRQ and I/O address chosen by BIOS
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Network Interface Card
 Driver
and protocol stack info
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Windows 95
 Specify
IP
address or
use DHCP
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Windows 95
Specify default gateway
 In this example, if IP
address not in range
192.192.192.241 thru
192.192.192.246, it will
go to router at

o 192.192.192.243
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Windows 95


DNS
Here, DNS server is named
server.Raleigh
o Not connected to Internet

If connected to Internet,
need a fully qualified
domain name
o server.Raleigh.com, or
o server.Raleigh.net, …
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Windows 95

WINS
o Windows Internet Name
Service
o Resolves internal (NetBIOS)
names to IP addresses


Used in Win NT and earlier
Can be used in Win 2000
and later, but by default,
these use DNS
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Windows 95



“Network Neighborhood”
Determines what is visible
to hosts on the LAN
Uses NetBEUI (NetBIOS
Extended User Interface)
o Prior to Windows 2000

To get outside of LAN,
NetBIOS over TCP/IP
(NBT)
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Windows 95

Configure SNMP agent
o Allow mgmt station to see MIB information
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Windows NT Server

Server manager
o Primary domain controller, SERVER
o Login once and access all computers in domain
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Windows NT Server

User manager for domains
o For configuring server
o Lists users and groups
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Windows NT Server
 TCP/IP
protocol stack
o Similar to previous
example (Windows 95)
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Windows NT Server

WINS server
o Static mapping of NetBIOS to IP addresses
o Not necessary to statically configure this
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Windows NT Server
 DNS
o Similar to previous
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Windows NT Server
 Network
interface card
o Also similar to Windows 95
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Windows NT Server
 SNMP
o More to configure in server
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Windows NT Server

SNMP services configuration (not shown)
o Specify which info can be stored in MIB-2 and
which is accessible by mgmt station
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Windows NT Server
 SNMP
security configuration
o A specified community name must be
included in SNMP packet from mgmt
station
o Each community name is allowed access
to specific MIB variables
o Can also choose to only accept SNMP
packets from specified hosts
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Windows NT Server
 SNMP
security configuration
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Windows NT Server

SNMP Traps
o Unsolicited msgs from agent to mgmt station
o Specify destination mgmt station for traps
o In distributed mgmt scenario, can send trap to
more than one mgmt station
o Example of trap: incorrect community name
(might help to detect an attack)
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Windows NT Server
 SNMP
Traps
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Chapter 4 Summary

Client/Server configuration
o Windows 95
o Windows NT server
IRQ and address
 TCP/IP
 Windows NT domain
 NetBIOS, etc.

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