The disclosed apparatus may include (1) a reply-reception module, stored in memory, that receives, from a satellite device, an authentication reply that includes an original authentication message digitally signed by the aggregation device using a private key of the aggregation device and that is digitally signed by the satellite device using a private key of the satellite device, (2) a forwarding module, stored in memory, that forwards the authentication reply to a network management server, (3) a validation-reception module, stored in memory, that receives, from the network management server in response to forwarding the authentication reply, a validation message, and (4) an authentication module, stored in memory, that authenticates the satellite device based at least in part on receiving the validation message. Various other apparatuses, systems, and methods are also disclosed.