Guide to SSL VPNs

    Guide to SSL VPNs

    Secure Socket Layer (SSL) Virtual Private Networks (VPNs) are a great way to facilitate secure remote access to your network. This guide covers the basics of SSL VPNs and will help you evaluate this technology.

    Secure Sockets Layer (SSL) virtual private networks (VPN) provide secure remote
    access to an organization’s resources. A VPN is a virtual network, built on top of
    existing physical networks, that can provide a secure communications mechanism for data
    and other information transmitted between two endpoints. Because a VPN can be used over
    existing networks such as the Internet, it can facilitate the secure transfer of
    sensitive data across public networks. An SSL VPN consists of one or more VPN devices
    to which users connect using their Web browsers. The traffic between the Web browser
    and the SSL VPN device is encrypted with the SSL protocol or its successor, the
    Transport Layer Security (TLS) protocol. This type of VPN may be referred to as either
    an SSL VPN or a TLS VPN.

    This guide uses the term SSL VPN. SSL VPNs provide remote users with access to Web
    applications and client/server applications, and connectivity to internal networks.
    Despite the popularity of SSL VPNs, they are not intended to replace Internet Protocol
    Security (IPsec) VPNs.1 The two VPN technologies are complementary and address separate
    network architectures and business needs. SSL VPNs offer versatility and ease of use
    because they use the SSL protocol, which is included with all standard Web browsers, so
    the client usually does not require configuration by the user. SSL VPNs offer granular
    control for a range of users on a variety of computers, accessing resources from many

    This publication discusses the fundamental technologies and features of SSL VPNs. It
    describes SSL and how it fits within the context of layered network security. It
    presents a phased approach to SSL VPN planning and implementation that can help in
    achieving successful SSL VPN deployments. It also compares the SSL VPN technology with
    IPsec VPNs and other VPN solutions. This information is particularly valuable for
    helping organizations to determine how best to deploy SSL VPNs within their specific
    network environments.

    The attached Zip file includes:

    Intro Page.doc

    • Cover Sheet and Terms.doc
    • Guide to SSL VPNs.pdf

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