Each application filter contains language specific to the protocol it is filtering, so it can
identify and block traffic that does not comply with the proper use of the protocol. The
following application filters are configured by default in ISA Server 2006:
. DNS filter
. FTP Access filter
. H.323 filter
. MMS filter
. PNM filter
. POP Intrusion Detection filter
. PPTP filter
FIGURE 3.34 Examining the Add-ins node of the ISA Console.
102 CHAPTER 3 Exploring ISA Server 2006 Tools and Concepts
. RPC filter
. RTSP filter
. SMTP filter
. SOCKS V4 filter
. Web Proxy filter
Examining Web Filters
In addition to the default application filters available with ISA Server 2006, a series of web
filters is also installed that extends the capability of ISA to scan incoming web (HTTP)
packets. These web filters, shown in Figure 3.35, allow for advanced HTTP filtering capabilities,
such as the capability to secure Outlook Web Access (OWA) traffic, or the capability
to perform Link Translation.
The web filters in ISA are accessible via the Web Filters tab in the Details pane of the Addins
node. For more specific information on using web filters, refer to Chapter 14,
???Securing Web (HTTP) and SharePoint Site Traffic.
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