Distribute VIP's to specific LAN users

[prk]

Hello everyone,
I hope I am asking this at the right forum.
I am a newbie and this might be a noob questions.

My internet provider is giving me 5 usable static IP's
I am successfully able to use internet using the default WAN settings.(something like 103.11.12.14)

I wanted to know if I can distribute Virtual IP's to users in my network, as in, local IP 192.168.1.10 to 192.168.1.19 tries to access whatismyip.com the public IP for them should show as 103.11.12.99
local IP from 192.168.1.20 tries to access whatsmyip the public IP it shows to them will be 103.11.12.100

Another question is if I can make sure that all requests which goes for port 22 (outbound) should always use my Public IP and for all other services it should use Virtual IP.

Below is the IP range I have got (not exactly same but similar).
WAN IP
IP - 103.11.12.14
Sub net - 255.255.255.252
Gateway - 103.11.12.13

Public IP Pool - 103.11.12.96/29
Network - 103.11.12.96
Gateway - 103.11.12.97
Broadcast - 103.11.12.103
Usable - 103.11.12.98 - 103.11.12.102

Can somoeone help me on how this needs to be configured.
Thank You

[viragomann]

@prk
You can do that all with Firewall > NAT > Outbound. Switch it into hybrid mod, then you can add rules to override the default behaviour (masquerading).

If you strict want to forward a public IP to a certain internal and have this internal IP use that public, you can use NAT 1:1 rules.

However, before you have to assign each IP out of the additional /29 subnet in Firewall > virtual IPs as type "IP Alias" to your WAN.