Issue with internet connection (reaching ISP activation webpage)

[Lambeth]

Hello

My ISP has setup so that every customer (me) needs to access an activation webpage, and on the webpage click a button "activate internet" so that the internet connection actually works.

My problem is that I cannot reach this webpage from my computer, since my computer is "behind" my OPNSense firewall/router.
I must connect a device directly, and then open a web-browser, try to go to a website which triggers a redirection to the ISP activation webpage.

Reaching the ISP activation webpage is a bothersome task, is it perhaps possible to fix in some way so that I can reach the webpage from my computer (which is behind the OPNSense firewall/router in a LAN)

Thanks for any ideas.

[Patrick M. Hausen]

This policy sucks rocks. Find a better ISP.