Some questions on AC86U

[Phoenix13023]

Hello Guys,

I have a new AC86U and flash it to Merlin 384.5. I use a HDD connect to usb3.0 port and follow a tourist install Transmission (2.94).
The problem is the transmission couldn't connect private bitorrent tracker and the port for its always closed.
I have try write script like :

#!/bin/sh
iptables -I INPUT -p tcp --destination-port 51413 -j ACCEPT
iptables -I INPUT -p udp --destination-port 51413 -j ACCEPT

and also set the "Port forwarding" in "Wan"-"advanced settings".

But in transmission remote gui - wan - port "testing", it's still close.

In transmission setting, DHT,pex are all be off.

So, it's look like two issue, or may be one. I don't know how I could find the right way for it.

If you know anything related, please tell me. thx!