ok, depends on your network topology but you should just be able to use a forwarding VS, see below
"Host IP forwarding virtual server
A host IP forwarding virtual server forwards traffic to a single destination host address. For example, the following configuration defines a host IP forwarding virtual server that accepts any traffic arriving on the Virtual Local Area Network (VLAN) named external whose destination is 10.0.0.1 on any service port using any valid TCP/IP protocol. The traffic is forwarded from the external VLAN to the destination host at 10.0.0.1:"
ltm virtual /Common/forward_vs {
destination /Common/10.0.0.1:0
ip-forward
mask 255.255.255.255
profiles {
/Common/fastL4 { }
}
source 0.0.0.0/0
translate-address disabled
translate-port disabled
vlans {
/Common/external
}
vlans-enabled
}