Allows two global IP to connect to one internal IP with Port Address Translation.
PIX515E 7.22


access-list ACLIN extended permit tcp any any eq www
access-list PNAT1 extended permit tcp host 192.168.1.40 eq www any eq www
global (outside) 1 interface
nat (inside) 1 0.0.0.0 0.0.0.0
static (inside,outside) tcp interface www 192.168.1.40 www netmask 255.255.255.255 tcp 500 150
static (inside,outside) tcp 255.255.227.115 www access-list PNAT1 tcp 80 0
access-group ACLIN in interface outside