ASA5505 SOHO public ip range and nat head ache

Question

Hello
Can anyone shed some ligh on a problem im having. We have setup a ASA 5505 with an ISP called Zen that allocates you a subnet of public ip addresses. i have sucessfully  setup the asa to access the internet using nat on the outside interface. we would like to use the other ip addresses in the range for other services but i cannot think how i can do this/configure this.
LAN > ASA5505 > VDSL Modem > ISP
the range they have given us is
Number of IP addresses: 8
IP addresses: XX.XX.XXX.40 - XX.XX.XXX.47
Subnet mask: 255.255.255.248
Subnet in slash notation: XX.XX.XXX.40 /29
Network address: XX.XX.XXX.40
XX.XX.XXX.41
XX.XX.XXX.42
XX.XX.XXX.43
XX.XX.XXX.44
XX.XX.XXX.45
XX.XX.XXX.46 Router
Broadcast address: XX.XX.XXX.47
Router address: XX.XX.XXX.46
i have setup XX.XX.XXX.46 on the otside interface and hosts inside can access the net and nat from the internet to internal devices all work.
we have a vdsl modem connected to the outside interface and using PPPoE we dynamically get the XX.XX.XXX.46/32 address.
Is there any way i can use the other spare addresses? i do see how i can use them. i have done a lot of browsing and the only way i see that other people have been able to do this is using a layer3 device and using ip unnumber of the external int point to a loopback,
any info or advice would be gratefully received.
regards
C.

Answer 1

Hello
the version is Cisco Adaptive Security Appliance Software Version 9.2(2)4
debugging icmp i see pings to the .46 address however i see no pings/traffic received on the asa for the other addresses. how does zen know to route the xx.xx.xx.41 to .45 ip addresses to the firewall using the .46 address?
the nat rules i have are
nat (Vlan200_Int,Outside_Dirty_Int) dynamic interface < this works for lan access to the internet
nat (Vlan200_Int,Outside_Dirty_Int) static xx.xx.xx.45 no-proxy-arp service tcp www 65100
nat (Vlan200_Int,Outside_Dirty_Int) static xx.xx.xx.45 no-proxy-arp service tcp https 65101
access-list Outside_Dirty_Network_access_in extended permit tcp object Click_PC object ESXi object-group DM_INLINE_TCP_7
object-group service DM_INLINE_TCP_7 tcp
port-object eq 902
port-object eq www
port-object eq https
thanks for the help