Microsoft Proxy Server - Application Servers - Lecture Slides, Slides of Computer Networks

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Microsoft Proxy Server 2.0 docsity.com Objectives of the Proxy Server • Defining the Microsoft Proxy Server 2.0 • Benefits • Features • System Requirements • Pricing • Different Sized Network • Configuration of Proxy Server • Proxy Relay • Advantages and Disadvantages of Proxy • Summary docsity.com Benefits of Proxy Server • High Performance Caching • Manageability & Control • Firewall Security docsity.com High-Performance Caching • Accelerates access to the Internet • Offers unbeaten scalability • Fault-Tolerance docsity.com Manageability & Control • Blocks access to undesirable web sites • Supports centralized management tools • Many cost saving benefits docsity.com Features of MS Proxy Server 2.0 • Real-time Security Alerts • Reverse Proxy • Reverse Hosting • Server Proxying • Improved Performance • Hierarchical Content Caching • FTP and HTTP Cache Support • Web Administration docsity.com Real-Time Security Alerts • Notification of network under attack • Supports several alerting thresholds docsity.com Reverse Proxy • Places web server behind Proxy server to Publish to the Web • Web Server can maintain access to internal network services docsity.com Server Proxying • Application Server can be behind Ms Proxy Server for added security. • Similar to Web Server behind Proxy Server • Example: MS Exchange Server computer can be placed behind you Proxy Server docsity.com Improved Performance • Offers unbeaten performance for Internet connection • Proxy Server 2.0 is 40% faster than Proxy Server 1.0 docsity.com Hierarchical Caching • Caching across a hierarchical connection of individual Proxy Servers • Enables distributed deployment to branch offices and departments docsity.com System Requirements for MS Proxy Server • Computer / Processor • Memory • Hard Disk • Display • operating System • Peripherals docsity.com Computer /Processor of MS Proxy Server • 486/33 MHz or Higher • Pentium or Pentium PRO Processor • Intel Pentium 133 MHz supports up to 300 desktop PCs • Intel Pentium 166 MHz supports more than 300 desktop PCs also supports DIGITAL Equipment Alpha Processor /AXP docsity.com Hardware • 1 to 300 clients: Pentium 133 with 2 GB of cache and 32 MB of RAM • 300 to 2,000 clients: Pentium 166 with 2 to 4 GB of cache and 64 MB of RAM • 2,000 to 3,500 clients: Pentium 200 with 8 to 16 GB of cache and 256 MB of RAM docsity.com Display of MS Proxy Server • VGA • Super VGA • Video Graphics adapter – Compatible with Windows NT Server 4.0 docsity.com Operating System of MS Proxy Server • Microsoft Windows NT Server version 4.0 • With windows NT Server 4.0 Service Pack 3 or greater docsity.com Peripherals Microsoft Internet Information server 3.0 or greater docsity.com Different Sized Networks • Small Office Network • Medium-Size office Network • Large Enterprise Network docsity.com Small Office Network • Single LAN segment • Connectivity to an ISP • Supports fewer than 300 clients • NIC to the internal network • Modem to the external network (Internet) • Uses Auto Dial for dialing to the Internet docsity.com Small NetworkInternet Internet Service Provider Proxy Server Client Web ServerClient docsity.com Medium Sized Network • Branch office with several LAN segments • Central office has a single LAN segment • Demand-dial connection from Central office to the Branch office • Supports fewer than 2000 clients • Auto Dial used for dialing between offices • NIC to local network (branch) • Modem to network in the central office docsity.com Large Enterprise Network • Central location with LAN segments with a backbone LAN • Branch offices, each with a single LAN segment • ISP and Dedicated Link connection from central location to an ISP • Supports over 2000 clients docsity.com Auto Dial • Proxy Servers dialing technique to an ISP for Internet connection • Uses Windows NT ‘s (Remote Access Service) and Dial Up Networking to connect with an ISP docsity.com Proxy server configuration • Uses Internet Service Manager. • Proxy services – Caching page • Definition of cache • Types of cache • Application benefits from larger caches – Routing page – Publishing page – Permission page docsity.com Caching Page Routing | Publishing | Logging | Cache • Definition of cache • Types of caches • Applications that benefit from larger caches docsity.com Cont. types … • Ex. L1 cache memory on the same chip as the microprocessor. • International, national, regional, organizational and other “macro” caches to which highly popular information can be distributed and periodically updated and from which most users would obtain information. docsity.com Applications that benefit from larger caches • Use of Apple GeoPort Telecom Adatper • Computationally intensive applications such as 3-D rendering • Games, particularly 3-D types such as Marathon and Descent • SoftWindows docsity.com Proxy Relay • Internet Firewall to protect the Intranet • Intranet Firewall Window • Static Router docsity.com Installing a proxy on the WAN • To install the proxy server on the WAN port, first configure the Internet Firewall’s intranet settings to allow LAN users to access the proxy. 1. Install the proxy server – Install and configure using a valid IP address – Proxy server connect to a hub that is connected to the WAN port on the Internet Firewall docsity.com Installing cont…. • Configure the Web Proxy Relay – Click Advanced, and then select the Proxy Relay tab – Configure the Web proxy relay • Web traffic is directed to the proxy without reconfiguring all the Web browsers on the LAN docsity.com Proxy Relay Window Bea eee ee Promy Relay intrapet ac Gne thon pair Automatic Proxy Forwarding (¥ See i Network 5 a Installing Firewall… • Connect the power adapter to an AC power outlet and then connect it to the power port on the back of the Internet Firewall • Click Advanced, select the Intranet tab • Using the inclusive method – Include IP addresses of the machines which are connected to the Intranet Firewall’s LAN port docsity.com Installing Firewall… • Using the exclusive method – Specify the IP addresses of the machines connected to the Internet Firewall’s WAN port • You can enter these addresses individually or as a range – Ex. 51 IP addresses from 192.168.23.50 to 192.168.23.100 • Click Update to send the configuration data to the Internet Firewall docsity.com Intranet Firewall Window Paka en eed Ele Edk View (Go Window |Help Update Cancel J STATUS: Rearly Document! Done http://support.3com.com/infodelit Static Router Ee tadinaM diktet es debates babes ad Fie Edt View Go Window Helo pe fee |S Lat | lc.) A) | i I] eh Back Reload Home Seach Guide Prt Secuty & > Bockmaiks | | IT Prony Relay Current Network Settix Web IP Address Subnet ceeacror 3 5 LAN 55.255 DMZWAN Network Static Routes Dest. N Subnet mask Add Route Log Tools Policy bse ath Se Network Settings See ee ae ed Fie Ect View Go Window! Help Paes ||| Foor | | LSet | Ieee Back Reload Home Search <i Bookmarks 4¢ Location [hits //1 Network Addressing Mode ere Network Update Cancel | 5 Policy Advamed STATUS: Heady Advantages of Proxy Server • Previously accessed pages will load much faster • Improved security on the Internet • Protects the internal network from being identified by the public. – Giving the network two identities: • One for internal use • One for external use • The cache can serve all users docsity.com Cont. Disadvantages… • A proxy server makes the audio and video stream less efficient • The movements are jerkier and the sound and lip movements are skewed – Because it can only store repeatable information. docsity.com The reasons for using Proxy servers • Greatly reduce the amount of traffic on the internet due to the fact when a popular page is requested – It doesn’t need to be loaded from the source every time. – The first time is requested it is cached and every page is loaded from the proxy server. docsity.com Summary • A proxy server intercepts all requests to the Web server to see if it can fulfill the requests by returning a locally stored copy of the requested information. If not, the proxy – Completes the request to the server – Returns the requested information to the user – Saves it locally to fulfill future requests docsity.com