[c-nsp] Bandwidth Throttling for HOST

[madunix]

my office network is connected to net via leasedline speed 2Mbps
backup---Internet--- Router ---ASA--DMZ--HOST
HOST got eth0:DMZ IP  w.x.y.z and eth1:LAN IP a.b.c.d
I want to take backup remotely of this server from outside through the
net, to speed up the backup i am looking to control the amount of
bandwidth (perform some sort of Quality of Service QOS) for this
(HOST) using a Cisco ASA for specific time 22:00-24:00 in order to
take the backup in short time.
i want to have full bw or limiting bandwidth to this particular IP
address (HOST) use e.g. 1.5Mbps of the bandwidth could i implement
this in asa or cisco router and how?

Thanks