Microweb PRO Series Guia de Instalação descarregar pdf (Página 48)

Trend Micro™ InterScan™ Web Security Virtual Appliance 6.5 Installation Guide

2-20

Web page requests follow this sequence:

1. The Web client sends a request to the HTTP proxy server.

2. The proxy server forwards the request to IWSVA.

3. IWSVA validates the request using URL Filtering/URL Access Control:

• If the URL is invalid (blocked), the HTTP service sends the HTTP client an

appropriate notice, completing the transaction.

• If the URL is valid, the HTTP service forwards the request to the Web server

on the Internet.

4. The contacted Web server returns a response (ideally a Web page) to IWSVA.

5. IWSVA performs its processing on the returned data (virus, spyware, ActiveX

scanning), then forwards the appropriate response/data to the proxy server.

6. The Proxy server caches the data (if cacheable), then delivers the response/data to

the HTTP client.

IGURE

2-9.

HTTP Proxy in Dependent Mode (Proxy Behind)

ABLE

2-5.

HTTP Proxy in Dependent Mode (Proxy Behind)

DVANTAGES

IMITATIONS

No configuration changes required

on the clients.

Configuration changes or pattern

updates on IWSVA do not affect cached

objects.

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Microweb PRO Series Guia de Instalação Página 48