The same function of IP localization can be applied to outbound traffic so that the responses from a server sent to an end-user can exit through its local WAN access without returning the session to the default gateway of origin.
However, it is imperative that when stateful services are deployed, the return traffic remains symmetrical with the incoming flows. This ensures the security of all current sessions without disrupting established sessions.
It is therefore important to involve the service of IP localization that exists for outgoing traffic with the other optimizations mechanisms available for the ingress traffic client to server.
