Understanding Windows Firewall
Windows Firewall in Windows Vista is a significant advance over the Windows Firewall first introduced in Windows XP Service Pack 2. Table 27-1 illustrates a feature comparison between these two firewalls.
Table 27-1. Feature Comparison Between Windows Firewall in Windows Vista and Windows XP SP2
Feature | XP SP2 | Windows Vista |
|---|---|---|
Filtering direction | Inbound only | Both inbound and outbound |
Default filtering action | Block (fixed) | Configurable actions for inbound and outbound traffic |
Protocols supported | TCP, UDP, ICMP (partial) | Any IANA IP protocols |
Types of rules | Filter by port, application, or ICMP type | Filter by any combination or permutation of the following: protocol, local or remote port (TCP and UDP only), ICMPv4/v6 Type and code, local ... |
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