Router Zyxel EX3301-T0 firewall, rule priority

HarryDualBeard · September 2023

Could you say anything about how the router Zyxel EX3301-T0 works with respect to its firewall functionality? I have a specific question:
If you set up Security > Firewall > General, level to "High", and create
an Access Control Rule that drops FTP traffic from LAN to WAN; what happens?
-- Will the text "Only local network traffic and LAN to WAN service
(Telnet, FTP, HTTP, HTTPS, DNS, POP3, SMTP) is permitted" have priority? Or ACL?
I e will FTP be dropped?

I couldn't find the answer in Zyxel's manual (470 pages), about which rule that has priority.

HouliCrab · November 2023

you can use protocol , Security>Firewall> Protocol

tonygibbs16 · November 2023

The user guide available at https://www.zyxel.com/uk/en-gb/support/download and https://www.zyxel.com/uk/en-gb/products/dsl-cpe/dual-band-wireless-ax1800-gigabit-ethernet-iad-ex3301-t0

says the following:

"Your customized rules take precedence and override the Zyxel Device’s default settings. The Zyxel
Device checks the source IP address, destination IP address and IP protocol type of network traffic
against the firewall rules (in the order you list them). When the traffic matches a rule, the Zyxel Device
takes the action specified in the rule."

HarryDualBeard · November 2023

Thanks for info.

HarryDualBeard · November 2023

I'm not impressed of the firewall. Each rule consumes 5% of the memory, and I probably need to write more than 20 rules…

The firewall also lacks the ability to group IP-addresses in each rule, it seems.

Router Zyxel EX3301-T0 firewall, rule priority

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