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Overview of Microsoft ISA Server

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Title: Overview of Microsoft ISA Server


1
Overview of Microsoft ISA Server
2
Introducing ISA Server
  • New ProductProxy Server
  • In 1996, Netscape had begun to sell a web proxy
    product, which optimized Internet web browsing by
    caching the images and text from web pages to
    local servers, enabling clients to access them
    quickly.
  • Microsoft released the first version (1.0) of
    Proxy Server, a new product to provide web proxy
    capabilities for clients.
  • the release of version 1.0 was version 2.0 ,
    which equalized many of the disparities between
    Microsofts Proxy Server product and the
    competitors
  • Proxy Server2.0 introduced the capability to
    create arrays of servers for redundancy and
    provided support for HTTP 1.1 and FTP

3
Introducing ISA Server
  • The Internet Security and Acceleration Server
    2000
  • focus more attention on the products security
    capabilities
  • This version of the product was the first that
    marketed it as a firewall by and of itself

4
Introducing ISA Server
  • ISA Server 2004
  • This version of ISA was vastly improved over the
    previous versions of the product, and it quickly
    became noticed in the wider security community.
  • ISA Server 2004 was originally released with only
    a standard edition of the product
  • Finally, predating the release of ISA Server 2006

5
Exploring ISA Server 2006s New Features
  • Multiple network support and per-network
    policiesintroduced the capability to set up and
    secure ISA between multiple networks
  • Support for complex and customizable
    protocolsinclude a wide array of known protocol
    support for rules.
  • New server and OWA(Outlook Web Access) publishing
    rules
  • Remote Procedure Call (RPC) filtering
    supportenables an administrator to specify what
    type of RPC traffic will be allowed from one
    network to another

6
Exploring ISA Server 2006s New Features
  • End-to-end secure web publishing
    capabilitiesallow for end-to-end securing of
    Secure Sockets Layer (SSL) encrypted web traffic
    from client to ISA Server, and then back to web
    server
  • RADIUS and SecurID authentication support
  • Stateful inspection for VPN connections
  • VPN quarantine control features
  • Enhanced monitoring, logging, and reporting
  • Forms-based authentication for all web sites
  • Enhanced branch office support tools

7
Choosing the Operating System for ISA Server 2006
  • install and deploy ISA Server 2006 servers on the
    Windows Server 2003 platform.
  • With ISA Server 2004, it was previously possible,
    though not recommended, to install ISA Server
    2004 on the Windows 2000 Operating System

8
Using Web Caching to Improve and Control Web
Browsing
  • caching commonly used web sites and their
    associated graphics, text, and media, and serving
    them up to end users more quickly than if they
    had to access the content across the Internet.
  • in ISA Server 2006the first time that particular
    page has been opened, the ISA Server then goes
    out to the Internet, downloads the content
    requested, and then serves it back to the client,
    while at the same time keeping a local copy of
    the text, images, and other HTTP or FTP content.
  • If another client on the network requests the
    same page, the caching mechanism delivers the
    local copy of the page to the user instead of
    going back to the Internet

9
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10
Using Firewalls
  • What is a Firewall?
  • A firewall is hardware, software, or a
    combination of both that is used to prevent
    unauthorized programs or Internet users from
    accessing a private network and/or a single
    computer
  • Firewall Rules
  • Allow traffic that flows automatically because
    it has been deemed as safe
  • Block traffic that is blocked because it has
    been deemed dangerous to your computer
  • Ask asks the user whether or not the traffic is
    allowed to pass through

11
Using Firewalls
12
3 Using Firewalls
  • enables you to block Internet traffic from using
    a specific port, such as FTP ports, to access
    internal resources.
  • In ISA, this type of filtering, done by
    traditional firewalls as well, provides for
    filtering of Internet Protocol (IP) traffic at
    the Network layer (Layer 3). however, comes with
    its capabilities to filter IP traffic at the more
    complex Application layer (Layer 7).

13
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14
Virtual Private Networks (VPNs)
  • Deployment of an ISA Server 2006 VPN solution is
    an increasingly common scenario for many
    organizations.
  • The capabilities for clients to securely access
    internal resources from anywhere in the world is
    ideal for many organizations.
  • VPN deployment with ISA Server 2006 typically
    involves a secure, encrypted tunnel being set up
    between clients on the Internet and an
    Internet-facing ISA firewall.
  • After the clients have authenticated, they are
    granted access to specific internal resources
    that are defined by the ISA administrator
  • The resources that can be accessed can be
    designated via access rules, so the control can
    be very granular

15
Virtual Private Networks (VPNs)
  • ISA Server also makes it possible to quarantine
    VPN users that do not comply with specific rules
    that can be set up

16
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