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IP/Port Filter
Choose "Firewall→IP/Port Filter" menu, and you will see the next screen (shown in Figure 4-44).
Here you can set the IP/Port filter rules to secure or restrict your local network.
Figure 4-44
SPI Firewall: Choose to enable or disable the SPI firewall.
Rule Action: The filter mode of this entry, it can be "Permit" and "Deny". If the mode is "Permit",
the IP connection matches the rule will be permitted; if the mode is "Deny", the IP connection
matches the rule will be denied.
Protocol: The protocol of this entry, it can be "IP", "ICMP", "TCP" and "UDP".
Direction: The direction of this entry, it can be "upstream" and "Downstream".
Source IP Address / Mask Address: The source IP address and mask address of the entry.
Dest IP Address / Mask Address: The destination IP address and mask address of the entry.
SPort: Tf the protocol is "TCP" or "UDP", you should set the source port of the entry. It can be a
single port or a port range.
Dport: TI the protocol is "TCP" or "UDP", you should set the destination port of the entry. It can
be a single port or a port range.
Enable: Choose to enable or disable this filter entry.
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