Two Public Networks with ISP Modem in bridge mode.

[Alex89]

Hi Everybody,

my ISP assigned two public networks to me.
They said to me, the modem that they send to me is configured to bridge mode.

Im dailing in over pfSense PPPoE. The PPPoE connection is automatic getting a dynamic gateway assigned.

My PPPoE Network/IP Address is 187.98.0.124/32. As said, the gateway address is dynamic and automatically assigned during the dial in process.
So the "WAN Address" is always 187.98.0.124.

The second network that my ISP assigned to me is 177.123.44.16/29
My ISP told me, that the Gateway for that Network is 177.123.44.17
But i cant ping that Gateway 177.123.44.17.

The address 177.123.44.18-177.123.44.22 are configured as Virtual IPs and are working fine for Outbound NAT and incoming connections. (Over the Dynamic assigned Gateway of my PPPoE connection).

I dont want to use the "normal" PPPoE WAN Address 187.98.0.124.
How can i configure pfSense to get over the Gateway 177.123.44.17? If i set the Gateway manually pfSense always marks the Gateway as "down". And there is no connection to the Internet.

Is the routing maybe not configured correct on the ISP site?
I think the gateway for my /29 network should be pingable or shouldnt it?

I want pfSense to use 177.123.44.18 as "WAN Address".. How can i realise that?
Is that even possible?

I would appreciate every help and hints pointing me in the right direction..

Thank you and greets,
Alex