I need your help with router and Comodo, please...

Hi, everybody.
I need your help about something: I decided to ask you if there is a way with DMZ to bypass router’s protection:
I read here that it is actually possible:

I followed those steps, but for some reason whenever I put my IP address in DMZ (192.168.x.x) either internet connection was disrupted or it simply did not work at all, since direction of all unsolicited traffic directly to the software firewall’s network interface was not achieved in any way.
And that’s what I want.
I did this once before like 4 years ago, it truly worked, now it does not work at all, is there any way to bypass router’s protection or not?
My router is Edimax AR-7084A.

The reason why I want to do this is because I want to see how good is Comodo’s inbound protection and are all ports closed by Comodo firewall, just in case, I want to know if I didn’t do something wrong.
Thank you in advance for your time and patience.

Does it mean that from now on it’s permanently impossible to direct all router’s traffic to software firewall?
I don’t do this normally, most of the time, but from time to time I like to do this, just to see how Comodo smashes and defeats attacts.
Thank you for your time and patience.

There should be no problems with placing a client in the DMZ, I use the facility quite often. However, according to your router manual, if you have SPI enabled on the router, all traffic will be filtered, including that of clients in the DMZ. Look under the routers Advanced settings/firewall. Also make sure you reboot the PC after configuring the DMZ on the router.

I did all that yesterday and today, and it still does not work, the last time I followed those exact instructions and it did work, now it does not work at all.

The installation of CIS will have no impact on your routers ability to place clients in the DMZ. It will have an impact on the connectivity of the PC, if you have incorrectly configured rules.

Perhaps you can provide some more detail…