How to use expanded iptables on Asus RT-AC1200G+

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haf o matic

New Around Here
hello,
I'm using Asus RT-AC1200G+ with newest firmware version 3.0.0.4.382_51610.
Since I cannot use Merlin on my router I'm trying to figure out is there a way to extend itables capabilities some other way.

Current version of iptables is v1.4.12.2
As far as I could read on the net TEE extension should be available from v.1.4.8. so technically I would be able to use TEE but that is not the case.

I'm trying to do Port Mirroring as described here: https://computermentor.net/guides/guides/asus-port-mirror.php

Code:
iptables -I PREROUTING -t mangle -j ROUTE --gw 192.168.1.2 --tee

iptables -I POSTROUTING -t mangle -j ROUTE --gw 192.168.1.2 --tee

But this sees not to work on my router although commands don't issue an error.
I think --tee and --gw arguments doesn't work for me.

Any advice?
 

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