Funi,
Supposing your servers are less than 15, so you can correspond each public ip address to separate web server. This is example configuration for just one server ..
set security nat destination pool pool-1 address 192.168.1.1/32
set security nat destination rule-set rs1 from interface ge-0/0/X.Y
set security nat destination rule-set rs1 rule r1 match destination-address 10.10.10.1/32
set security nat destination rule-set rs1 rule r1 match destination-port 80
set security nat destination rule-set rs1 rule r1 then destination-nat pool pool-1
set security nat proxy-arp interface ge-0/0/X.Y address 10.10.10.1/32
Howver, if you have large server farm, then you can do two things
- Do the PAT to meet the requirement
- increase destination pool from /32 provided your servers (however, it is not workable if servers are hosting different websites)
regards