TP-Link TD854W User Manual page 74

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
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.

Current Filter table: It shows the current filter rules. You can enable or disable or delete the
filter entry.
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Figure 4-45
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