NetComm HS1200N User Manual page 61

If the Protocol Type is IP, the Protocol Number needs to be defined.
User Firewall Rules
After the custom protocol is defined(or just use the Predefined Service Protocols), you will need to enable the Firewall Rule to apply
these protocols. Firewall Rules for IPv6 is also supported.
Firewall Rules: Click Rule No. to edit individual rules and click Apply to save the settings. The rule status will be shown on the list.
Check the "Active" checkbox and click Apply to enable the rule.
Rule No.1 has the highest priority; Rule No.2 has the second highest priority and so on. Each firewall rule is defined by Source,
Destination and Pass/Block action. Optionally, a Firewall Rule Schedule can be set to specify when the firewall rule is enforced. It
can be set to Always, Recurring or One Time.
Selecting the Filter Rule Number 1 as an example:
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