TM internetwork products offer NAT, which are implemented as Packet Translation Rules.  Input Translation Rules are honored when packets are first received, and can alter the destination IP address or port of packets.  Output Translation Rules occur just before packets are transmitted, and can alter the source IP address.  Packet Translation Rules occur on a connection-by-connection basis, meaning that 'forward' and 'reverse' traffic part of the same logical network communication are translated as a whole.  Connections may be matched by most combinations of source address, destination address, input interface, output interface, and destination port.