Chapter 23 WAN Optimization, Web Cache, Explicit Proxy, and WCCP : Before you begin : Before you begin
  
Before you begin
Before you begin to configure WAN optimization, Web caching, explicit proxies or WCCP, take a moment to note the following:
• To use WAN optimization and web caching your FortiGate unit must support these features and not all do. In general your FortiGate unit must include a hard disk to support these features. See “FortiGate models that support WAN optimization”. Most FortiGate units support the explicit web and FTP proxies.
• To be able to configure WAN optimization and web caching from the web‑based manager you should begin by going to System > Config > Features and turning on WAN Opt. & Cache.
• To be able to configure the Explicit Web and FTP proxies from the web‑based manager you should begin by going to System > Config > Features and turning on Explicit Proxy.
• If you enable virtual domains (VDOMs) on the FortiGate unit, WAN optimization, web caching, and the explicit web and FTP proxies are available separately for each VDOM.
• This guide is based on the assumption that you are a FortiGate administrator. It is not intended for others who may also use the FortiGate unit, such as FortiClient administrators or end users.
• FortiGate WAN optimization is proprietary to Fortinet. FortiGate WAN optimization is compatible only with FortiClient WAN optimization, and will not work with other vendors’ WAN optimization or acceleration features.
• FortiGate web caching, explicit web and FTP proxies, and WCCP support known standards for these features. See the appropriate chapters of this document for details.
At this stage, the following installation and configuration conditions are assumed:
• For WAN optimization you have already successfully installed two or more FortiGate units at various locations across your WAN.
• For web caching, the explicit proxies and WCCP you have already successfully installed one or more FortiGate units on your network.
• You have administrative access to the web-based manager and/or CLI.
• The FortiGate units are integrated into your WAN or other networks
• The operation mode has been configured.
• The system time, DNS settings, administrator password, and network interfaces have been configured.
• Firmware, FortiGuard Antivirus and FortiGuard Antispam updates are completed.
• You Fortinet products have been registered. Register your Fortinet products at the Fortinet Technical Support web site, https://support.fortinet.com.