Virtual Interface or virtual ip's

[karanik]

Hello

I am trying to set up 1 WAN with block ip's

WAN Network               : 76.191.140.152/30
WAN Provider Interface GW : 76.191.140.153/30
WAN PfSense Interface     : 76.191.140.154/30

Block 8 IP’s

76.109.115.240/29

Until now i have done...

Firewall / Virtual IPs

76.109.115.241/29	FIBER 	IP Alias	Public IP #1	 
76.109.115.242/29	FIBER 	IP Alias	Public IP #2	 
76.109.115.243/29	FIBER 	IP Alias	Public IP #3	 
76.109.115.244/29	FIBER 	IP Alias	Public IP #4	 
76.109.115.245/29	FIBER 	IP Alias	Public IP #5	 
76.109.115.246/29	FIBER 	IP Alias	Public IP #6

NAT 1:1 Mappings

Interface	External IP    Internal IP	Destination IP	Description	    Actions
FIBER	    76.109.115.242     192.168.1.63	      *	        Public IP #2 >>    Nextcloud 

Port Forward

Interface	Protocol	Source Address	Source Ports	Dest. Address	Dest. Ports	NAT IP	NAT Ports	
FIBER	TCP	*	*	FIBER address	443 (HTTPS)	192.168.1.63	443 (HTTPS)

My ISP guides tell me the IP's Block must be on new virtual interface with ip 76.109.115.241 and Gateway 76.191.140.153
Is there any way /possibility to create a virual interface or the only way is to use virtual IP's?
Is there anything that I miss?