18 | SRA 6.0 Administrator’s GuideConcepts for Dell SonicWALL SRAThis section provides an overview of the following key concepts, with which the administratorshould be familiar when using the SRA appliance and Web-based management interface:• “Encryption Overview” section on page 18• “SSL Handshake Procedure” section on page 19• “IPv6 Support Overview” section on page 19• “Browser Requirements for the SRA Administrator” section on page 22• “Browser Requirements for the SRA End User” section on page 22• “Portals Overview” section on page 23• “Domains Overview” section on page 23• “Application Offloading and HTTP(S) Bookmarks Overview” section on page 23• “Cross Domain Single Sign-On” section on page 28• “ActiveSync Authentication” section on page 28• “Network Resources Overview” section on page 33• “SNMP Overview” section on page 39• “DNS Overview” section on page 39• “Network Routes Overview” section on page 39• “NetExtender Overview” section on page 39• “Two-Factor Authentication Overview” section on page 43• “One Time Password Overview” section on page 46• “End Point Control Overview” section on page 48• “Secure Virtual Assist Overview” section on page 49• “Web Application Firewall Overview” section on page 60Encryption OverviewEncryption enables users to encode data, making it secure from unauthorized viewers.Encryption provides a private and secure method of communication over the Internet.A special type of encryption known as Public Key Encryption (PKE) comprises a public and aprivate key for encrypting and decrypting data. With public key encryption, an entity, such as asecure Web site, generates a public and a private key. A secure Web server sends a public keyto a user who accesses the Web site. The public key allows the user’s Web browser to decryptdata that had been encrypted with the private key. The user’s Web browser can alsotransparently encrypt data using the public key and this data can only be decrypted by thesecure Web server’s private key.Public key encryption allows the user to confirm the identity of the Web site through an SSLcertificate. After a user contacts the SRA appliance, the appliance sends the user its ownencryption information, including an SSL certificate with a public encryption key.
