4 IP on single cable for ESX

Dear team

I would like to move all my home things to server housing provider so now I am playing until it works as expected.

Now - I have playing server with 3 NICs.

I installed trial esx.

I moved to housing vendor.

They provided me 1 "ONE" physical cable where 4 public IPs are translated 1:1. (A, B, C, D)

When I setup management IP as A I have problem that as soon as I start to play with pfsense firewall installed, I lost connect to A.

Can you advice where I do mistake?

Many thanks

V