Additional IP for cPanel [Revist]

[mcit]

Hi Everyone

As per this previous post - https://forum.pfsense.org/index.php?topic=58138.msg311149#msg311149
https://forum.netgate.com/topic/52349/additional-ip-for-cpanel

In summary, I have had this running successfully for some time, and to complete the above post, I am able to block individual ports via the WAN interface rules.

Now, I have a new fibre service installed, that is delivered via DHCP rather than PPPoE. So I have 1 less interface to use here.

I want to replicate the existing setup, but over the new connection. This issue is, that I now do not have a spare interface to assign the gateway IP to.

I have tried an IP Alias but so far I cannot get any traffic to flow [not even between the internal machine and the gateway].

I know this is a little used scenario compared to what most people are doing, but would anyone have any idea of what I can do to get this working?

Any help appreciated.

Matthew