As seen from the Router Monitor, you have deleted the default route to 192.168.2.1? Please confirm.
There is nothing wrong with making the router the default gateway.
Have you made the router " transparent" to port 8080 traffic, i.e. created a port forwarding to .99.102? If not or if this is not configured correctly then no 8080 traffic ever reaches the FG.
Have you checked that there are no ACLs (" firewall" ) on the router itself?
I correct myself, wan1 is using PPPoE and has 2 IPs assigned to it. But as there is no default route pointing to wan1 it is not used for outgoing traffic to the internet. So I don' t think it interferes here.
You can monitor traffic on wan1 with the bandwidth gadget (widget) on the Status page.
This setup is more complicated than needed, with a transfer net between FG and router. Can' t you just put the router in modem mode (bridge) and handle the PPPoE login on the FG? You' ll see more, have dynDNS etc.
The way it is set up now you' ll have to configure 2 devices everytime you change something.
Ede Kernel panic: Aiee, killing interrupt handler!