Installation guide

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

2-12

IGURE

2-5.

Reconfiguring the Client Settings

Using a Layer 4 Switch

Transparency is the functionality whereby client users do not need to change their Internet

connection’s proxy settings to work in conjunction with IWSVA. Transparency is

accomplished with a Layer 4 switch that redirects HTTP packets to a proxy server,

which then forwards the packets to the requested server.

IWSVA supports the “simple” type transparency. Simple transparency is supported by

most Layer 4 switches. While it is compatible with a wide variety of network hardware

from different manufacturers, configuring simple transparency does impose several

limitations:

• When using simple transparency, the User Identification method to define policies is

limited to IP addresses and host names; configuring policies based on LDAP is not

possible.

• FTP over HTTP is not available; therefore, links to ftp:// URLs might not work if

your firewall settings do not allow for FTP connections. Alternatively, links to ftp://

URLs might work, but the files will not be scanned.