This document discusses DHCP, DNS, and proxy servers. It provides instructions on how to install and configure DHCP and DNS servers in Windows Server 2008. It explains what DHCP, DNS, and proxy servers are and their purposes. DHCP assigns IP addresses to clients, DNS maps domain names to IP addresses, and proxy servers allow indirect network connections between clients and other servers.

2. DHCP, DNS and Proxy
servers
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3. DHCP Server
 Dynamic Host Configuration Protocol
(DHCP) is a network configuration protocol for
hosts on Internet Protocol (IP) networks.
Computers that are connected to IP networks
must be configured before they can
communicate with other hosts.
 A DHCP Server assigns IP addresses to client
computers. This is very often used in enterprise
networks to reduce configuration efforts. All IP
addresses of all computers are stored in a
database that resides on a server machine.

4. DHCP
This is a very simple and easy
to use implementation of a
DHCP Server for Windows
based systems supporting all
Windows operating systems
from Windows 98 to Windows
7.
Before you can configure the DHCP service, you must
install it on the server. DHCP is not installed by default
during a typical installation of Windows Standard Server
2008 or Windows Enterprise Server 2008. You can install
DHCP either during the initial installation of Windows
Server 2008 or after the initial installation is completed.

5. How to DHCP install and Configure
 Step 1: Go to Start and select on
Administration Tool click on server
manager
 Step 2: Click Roles then click add role from
right of window
 Step 3: new window apear click next and
check the Dynamic Host Configuration
Protocol and click next
 Step 4: There are step shown
bellow(figures)
 Step 5: Click Next button for install

6. DHCP installation in windows server
2008
• Step 1: Goto start -> Administration tools -> Server manger.
•Step 2: Click Roles then Click Add New Role
A new window is appear.

8. Scope: A scope is a collection of IP addresses for computers on a
subnet that use DHCP.

10. After Installation DHCP
A menu of DHCP is add
in Administration Tool
Click on DHCP then this
window apeared it show
all information of DHCP
configurations.

11. For Changing the
range of IP group,
goto properties of
Scope.
In figure show the
old range of IP
addresses you can
change it by enter
new IP addresses

12. If you want to enter a group of IP then you right click on Address
Pool select new Existing Range
This Range only between the parent range.
As see in Fig.

14. DHCP servers permit you to reserve an IP address for a client. This means that the
specific network client will have the same IP for as long as you wanted it to. To do this
you will have to know the physical address (MAC) of each network card. Enter the
reservation name, desired IP address, MAC address and description - choose whether
you want to support DHCP or BOOTP and press add. The new reservation will be added to
the list.

15. DHCP Server TroubleShooting
Before Troubleshooting we must find what the problum e.g
Unable to provide servers to clients or Server stopped or Data
is loss during transfering.
• Authorize the DHCP server in the enterprise where it is being used.
• Inappropriate Address Assignment
• IP Address Conflicts
• DHCP overlaped
http://www.windowsnetworking.com

16. DNS Server
The Domain Name System (DNS) servers distribute the job of
mapping domain names to IP addresses among servers allocated
to each domain.
Each second-level domain must have at least one domain name
server responsible for maintenance of information about that
domain and all subsidiary domains, and response to queries about
those domains from other computers on the Internet.

17. DNS Installation and Configuration
Intallation
1. Go to Start, Administration Tool and then click Server
Manager.
2. In the results pane, under Roles Summary, click Add roles.
3. In the Add Roles Wizard, if the Before You Begin page
appears, click Next.
4. In the Roles list, click DNS Server, and then click Next.
5. Read the information on the DNS Server page, and then click
Next.
6. On the Confirm Installation Options page, verify that the
DNS Server role will be installed, and then click Install.

18. DNS installation in windows server
2008
• Step 1: Goto start -> Administration tools -> Server manger.
•Step 2: Click Roles then Click Add New Role
A new window is appear.

20. Configuration of DNS Server
Goto start -> Administration Tool -> click DNS

21. By configuration Right click on Server name and go to properties

22. A forward lookup zone is the most common type of zone. DNS
clients can use this zone to obtain such information as IP
addresses that correspond to DNS domain names or services
that is stored in the zone.
Another type of zone, a reverse lookup zone, provides mapping
from IP addresses back to DNS domain names.
DNS provides a reverse lookup process, in which clients use a
known IP address during a name query and look up a computer
name based on its address. A reverse lookup takes the form of a
question, such as "Can you tell me the DNS name of the
computer that uses the IP address 192.168.1.20?“

23. For Creating new Host, right click on new server(forwordlookup)
click add new host
You can create Mail Exchanger

26. Proxy Server
A proxy server is a computer that offers a computer
network service to allow clients to make indirect
network connections to other network services. A client
connects to the proxy server, then requests a
connection, file, or other resource available on a
different server. The proxy provides the resource either
by connecting to the specified server or by serving it
from a cache. In some cases, the proxy may alter the
client's request or the server's response for various
purposes.

27. Proxy Settings
Browsers Settings
Goto Tool -> Internet Options
Then Click Connections -> LAN
Settings

28. •In the Address box, type the IP address of the proxy server. In the Port box,
type the port number that is used by the proxy server for client connections
(by default, 8080).
• You can click to select the Bypass proxy server for local addresses check
box if you do not want the proxy server computer to be used when you
connect to a computer on the local network (this may speed up
performance).

29. Following softwares are used for proxy configuration
1. CCProxy (Any Virsion)
2. WebSphere Proxy Server
3. Proxy Server
4. My Proxy Server.com
5. etc
Links:
Softpedia.com
Brothersoft.com

36. Types of Proxy Servers
Web Proxy Servers
1. Transparent Proxy
2. Anonymous Proxy
3. High Anonymity Proxy

37. Transparent Proxy
A transparent proxy is a server that satisfies the definition
of a proxy, but does not enforce any local policies. It means that it
does not add, delete or modify attributes or modify information
within messages it forwards. These are generally used for their
ability to cache websites and do not effectively provide any
anonymity to those who use them. However, the use of a
transparent proxy will get you around simple IP bans. Further, your
web browser does not require special configuration and the cache
is transparent to the end-user. This is also known as transparent
forward proxy.

38. Anonymous Proxy
An anonymous proxy server also known as web proxy,
generally attempts to anonymize web surfing by hiding the
original IP address of the end user. This type of proxy server are
typically difficult to track, and provides reasonable anonymity for
most users.
High Anonymity Proxy
This type of proxy server does not identify itself as a proxy
server and does not make available the original IP address.