DHCP, DNS and Proxy serversMembers: Muhammad Yasir 10-arid-479 Muhammad Rizwan 10-arid-473 Talib Mehmood 09-arid-828Group = JSpecial Thanks: Sir Ghawas Khan
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.
DHCPThis is a very simple and easyto use implementation of aDHCP Server for Windowsbased systems supporting allWindows operating systemsfrom Windows 98 to Windows7.Before you can configure the DHCP service, you mustinstall it on the server. DHCP is not installed by defaultduring a typical installation of Windows Standard Server2008 or Windows Enterprise Server 2008. You can installDHCP either during the initial installation of WindowsServer 2008 or after the initial installation is completed.
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
DHCP installation in windows server 2008• Step 1: Goto start -> Administration tools -> Server manger.•Step 2: Click Roles then Click Add New RoleA new window is appear.
Scope: A scope is a collection of IP addresses for computers on asubnet that use DHCP.
After Installation DHCPA menu of DHCP is addin Administration ToolClick on DHCP then thiswindow apeared it showall information of DHCPconfigurations.
For Changing therange of IP group,goto properties ofScope.In figure show theold range of IPaddresses you canchange it by enternew IP addresses
If you want to enter a group of IP then you right click on AddressPool select new Existing RangeThis Range only between the parent range.As see in Fig.
DHCP servers permit you to reserve an IP address for a client. This means that thespecific network client will have the same IP for as long as you wanted it to. To do thisyou will have to know the physical address (MAC) of each network card. Enter thereservation name, desired IP address, MAC address and description - choose whetheryou want to support DHCP or BOOTP and press add. The new reservation will be added tothe list.
DHCP Server TroubleShootingBefore Troubleshooting we must find what the problum e.gUnable to provide servers to clients or Server stopped or Datais loss during transfering.• Authorize the DHCP server in the enterprise where it is being used.• Inappropriate Address Assignment• IP Address Conflicts• DHCP overlapedhttp://www.windowsnetworking.com
DNS ServerThe Domain Name System (DNS) servers distribute the job ofmapping domain names to IP addresses among servers allocatedto each domain.Each second-level domain must have at least one domain nameserver responsible for maintenance of information about thatdomain and all subsidiary domains, and response to queries aboutthose domains from other computers on the Internet.
DNS Installation and ConfigurationIntallation1. 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.
DNS installation in windows server 2008• Step 1: Goto start -> Administration tools -> Server manger.•Step 2: Click Roles then Click Add New RoleA new window is appear.
Configuration of DNS ServerGoto start -> Administration Tool -> click DNS
By configuration Right click on Server name and go to properties
A forward lookup zone is the most common type of zone. DNSclients can use this zone to obtain such information as IPaddresses that correspond to DNS domain names or servicesthat is stored in the zone. Another type of zone, a reverse lookup zone, provides mappingfrom IP addresses back to DNS domain names.DNS provides a reverse lookup process, in which clients use aknown IP address during a name query and look up a computername based on its address. A reverse lookup takes the form of aquestion, such as "Can you tell me the DNS name of thecomputer that uses the IP address 192.168.1.20?“
For Creating new Host, right click on new server(forwordlookup)click add new hostYou can create Mail Exchanger
Proxy ServerA proxy server is a computer that offers a computernetwork service to allow clients to make indirectnetwork connections to other network services. A clientconnects to the proxy server, then requests aconnection, file, or other resource available on adifferent server. The proxy provides the resource eitherby connecting to the specified server or by serving itfrom a cache. In some cases, the proxy may alter theclients request or the servers response for variouspurposes.
•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 checkbox if you do not want the proxy server computer to be used when youconnect to a computer on the local network (this may speed upperformance).
Following softwares are used for proxy configuration1. CCProxy (Any Virsion)2. WebSphere Proxy Server3. Proxy Server4. My Proxy Server.com5. etcLinks:Softpedia.comBrothersoft.com
Types of Proxy ServersWeb Proxy Servers1. Transparent Proxy2. Anonymous Proxy3. High Anonymity Proxy
Transparent Proxy A transparent proxy is a server that satisfies the definitionof a proxy, but does not enforce any local policies. It means that itdoes not add, delete or modify attributes or modify informationwithin messages it forwards. These are generally used for theirability to cache websites and do not effectively provide anyanonymity to those who use them. However, the use of atransparent proxy will get you around simple IP bans. Further, yourweb browser does not require special configuration and the cacheis transparent to the end-user. This is also known as transparentforward proxy.
Anonymous Proxy An anonymous proxy server also known as web proxy,generally attempts to anonymize web surfing by hiding theoriginal IP address of the end user. This type of proxy server aretypically difficult to track, and provides reasonable anonymity formost users.High Anonymity ProxyThis type of proxy server does not identify itself as a proxyserver and does not make available the original IP address.