chapter 4 configuration: client/server components 1 chapter 4 overview configure client/server...
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Chapter 4 Configuration: Client/Server Components 1
Chapter 4 Overview Configure client/server components
o Network interface card (NIC)o Windows 95o Windows NT (similar to Windows 2000)o TCP/IPo SNMP mgmt agentso Microsoft networkso Discussion of NetBIOS, DNS, etc.
Chapter 4 Configuration: Client/Server Components 2
Why Configuration?
Analogy to telephone systemo Network components like telephone
hardwareo Network configuration is like “getting
everyone to speak the same language” Network configuration necessary since
o Not all components are plug and playo Networks are heterogeneous (different
hardware, OSs, applications, protocols, etc.)
Chapter 4 Configuration: Client/Server Components 3
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 SNMPo In the past even the NIC had to be
configured (today, plug and play)
Chapter 4 Configuration: Client/Server Components 4
The LAN used in Textboo
k ROUTER
Probe = Remote MonitorWS = WorkstationPSTN = Public Switched TelephoneNetworkNMS = Network Management System = network links = management links
PSTN
WAN
HUB
PROBE 2 WS 2 SERVER PROBE 1
SWITCH 1SWITCH 2
SUBNET 2 SUBNET 1
LAN
NMS
WS 1
10BASE2 Segment
Router
Chapter 4 Configuration: Client/Server Components 5
Asynchronous Communication
Each external device has a unique combination of interrupt request (IRQ) number and I/O addresso These determine interrupt handler to callo Limited number of IRQs available
Must avoid conflictso In past, admin had to configure theseo Today, plug and play
Chapter 4 Configuration: Client/Server Components 6
Network Interface Card Consider Ethernet adapter
o IRQ and I/O address chosen by BIOS
Chapter 4 Configuration: Client/Server Components 7
Network Interface Card Driver and protocol stack info
Chapter 4 Configuration: Client/Server Components 8
Windows 95 Specify IP
address or use DHCP
Chapter 4 Configuration: Client/Server Components 9
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
Chapter 4 Configuration: Client/Server Components 10
Windows 95 DNS Here, DNS server is
named server.Raleigho Not connected to Internet
If connected to Internet, need a fully qualified domain nameo server.Raleigh.com, oro server.Raleigh.net, …
Chapter 4 Configuration: Client/Server Components 11
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
Chapter 4 Configuration: Client/Server Components 12
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)
Chapter 4 Configuration: Client/Server Components 13
Windows 95 Configure SNMP agent
o Allow mgmt station to see MIB information
Chapter 4 Configuration: Client/Server Components 14
Windows NT Server Server manager
o Primary domain controller, SERVERo Login once and access all computers in domain
Chapter 4 Configuration: Client/Server Components 15
Windows NT Server User manager for domains
o For configuring servero Lists users and groups
Chapter 4 Configuration: Client/Server Components 16
Windows NT Server TCP/IP protocol stack
o Similar to previous example (Windows 95)
Chapter 4 Configuration: Client/Server Components 17
Windows NT Server WINS server
o Static mapping of NetBIOS to IP addresseso Not necessary to statically configure this
Chapter 4 Configuration: Client/Server Components 18
Windows NT Server DNS
o Similar to previous
Chapter 4 Configuration: Client/Server Components 19
Windows NT Server Network interface card
o Also similar to Windows 95
Chapter 4 Configuration: Client/Server Components 20
Windows NT Server SNMP
o More to configure in server
Chapter 4 Configuration: Client/Server Components 21
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
Chapter 4 Configuration: Client/Server Components 22
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
Chapter 4 Configuration: Client/Server Components 23
Windows NT Server SNMP security configuration
Chapter 4 Configuration: Client/Server Components 24
Windows NT Server SNMP Traps
o Unsolicited msgs from agent to mgmt station
o Specify destination mgmt station for trapso In distributed mgmt scenario, can send trap
to more than one mgmt stationo Example of trap: incorrect community name
(might help to detect an attack)
Chapter 4 Configuration: Client/Server Components 25
Windows NT Server SNMP Traps
Chapter 4 Configuration: Client/Server Components 26
Chapter 4 Summary Client/Server configuration
o Windows 95o Windows NT server
IRQ and address TCP/IP Windows NT domain NetBIOS, etc.