User's Manual

C HAPTER 8 | Firewall Configuration
Port Filtering
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The following parameters are displayed on this page:
◆ Target IP – Specifies an IP address or range on the local network to
filter.
◆ Destination Port Range – Specifies a TCP/UDP port number range to
filter. (Range: 1-65535 or Any)
◆ Protocol – Specifies the the port type. (Options: TCP, UDP, Any)
◆ Add – Adds a new IP address to the filter table.
◆ Remove – Removes an IP address from the filter table.
PORT FILTERING
Port filtering restricts connections to limit the risk of intrusion and can
defend against a wide array of common hacker attacks. The port filtering
feature allows the Gateway to block traffic for a specified schedule based
on TCP/UDP ports.
Figure 38: Port Filtering
The following items are displayed on this page:
◆ Available Services — The TCP/UDP services allowed access to the
Gateway. All TCP/UDP ports are open unless specified as blocked. Some
common protocols are pre-defined and can be selected to “Add” to the
Blocked Services. Select “Custom Port” to define other TCP/UDP port
ranges to block.
◆ Operation — Adds, removes, or clears all blocked services.
◆ Blocked Services — Lists the TCP/UDP ports that are blocked
◆ Type — Specifies the port type, TCP, UDP, or TCP/UDP.