How to access Tomato GUI through Router modem login

Hi there

Noob question.

I have a Bipac Billion 8800AXL linked to a Netgearv R700 (tomato fw) and have finally succeeded in getting it to work with Private Innternet Access VPN.

When linked into the Netgear Router I can access both configuration pages on 192.168.1.254 and 192.168.1.1 but when linked into the 8800AXL I can only access the 8800AXL page.

Has anyone any idea how I can configure my setup to allow me to access the 192.168.1.1 page from my 8800AXL login.

Sorry if this has been answered before but I didn't know what search criteria to enter.

Regards

Midjet76