A method includes receiving, at a client device, an authentication seed from a first network. The method also includes receiving a shared secret. The method further includes, in response to receiving the authentication seed, determining a network address of the client device. The method further includes computing a result of a one-way hash function of a combination of the network address, the authentication seed, and the shared secret. The method further includes transmitting the network address and the result of the one-way hash function to a server that provides access control of a second network coupled to the first network. The method further includes receiving permission from the server to access the second network.