Application layer filters perform stateful application layer inspection on non-Web protocols.
There are application layers for the most common application layer protocols used to connect to the Internet.
Web filters are used to filter HTTP, HTTPS, and FTP tunneled connections through the ISA firewall.
You cannot disable the Web Proxy filter for Web Publishing Rules.
The ISA firewall automatically protects you against common network layer attacks; this is the ISA firewall's intrusion protection feature.
The ISA firewall can be configured to detect and report common attacks. This is the ISA firewall's intrusion detection feature.
Even when the ISA firewall is not configured to detect an intrusion, it will protect you against it.
The DNS filter protects published Web servers from common buffer overflow exploits, and prevents remote users from performing a zone transfer from your published DNS servers.
You can configure the ISA firewall to allow specific IP Options when required for network diagnostics and then disable those options after the diagnostics are completed.