Configuring TCP/IP Packet FiltersFor increased security, you can implement IP packet filters to control the type of inbound IP traffic allowed to enter your computer and/or network. Inbound traffic can be filtered by destination TCP port, destination UDP port, and by IP protocol type. Implementing IP Packet FiltersUse the following process to implement IP packet filters:
By default, traffic on all TCP and UDP ports are allowed. To specify the type of traffic allowed to reach your computer, select one of the Permit Only options (depending on whether you want to configure TCP, UDP, or protocols) and click Add. If you are configuring TCP and UDP traffic, you will specify the port number (Tables 5.3 and 5.4 summarize some of the common ports used by TCP and UDP). To configure protocols, specify the type of IP protocol to which you want to allow access. Table 5.3. TCP Ports
Table 5.4. UDP Ports
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