Apparatus comprising: at least one computer memory that is not a transitory signal and that comprises instructions executable by at least one processor to: establish communication with a first wireless network; establish communication with a second wireless network, the first and second wireless networks not communicating with each other except through the apparatus; prevent a first type of message from the first wireless network and addressed to the second wireless network and/or one or more devices communicating over the second wireless network from being passed to the second wireless network; permit a second type of message from the first wireless network and addressed to the second wireless network and/or one or more devices communicating over the second wireless network to be passed to the second wireless network; prevent a third type of message from the second wireless network and addressed to the first wireless network and/or one or more devices communicating over the first wireless network from being passed to the first wireless network; and permit a fourth type of message from the second wireless network and addressed to the first wireless network and/or one or more devices communicating over the first wireless network to be passed to the first wireless network; wherein the first type of message includes a simple service discovery protocol (SSDP) presence message; wherein the second type of message includes a request for information embodied in a simple object access protocol (SOAP) request; wherein the third type of message includes a request for information embodied in a simple object access protocol (SOAP) request; and wherein the fourth type of message includes a simple service discovery protocol (SSDP) presence message. at least one computer memory that is not a transitory signal and that comprises instructions executable by at least one processor to: establish communication with a first wireless network; establish communication with a second wireless network, the first and second wireless networks not communicating with each other except through the apparatus; prevent a first type of message from the first wireless network and addressed to the second wireless network and/or one or more devices communicating over the second wireless network from being passed to the second wireless network; permit a second type of message from the first wireless network and addressed to the second wireless network and/or one or more devices communicating over the second wireless network to be passed to the second wireless network; prevent a third type of message from the second wireless network and addressed to the first wireless network and/or one or more devices communicating over the first wireless network from being passed to the first wireless network; and permit a fourth type of message from the second wireless network and addressed to the first wireless network and/or one or more devices communicating over the first wireless network to be passed to the first wireless network; establish communication with a first wireless network; establish communication with a second wireless network, the first and second wireless networks not communicating with each other except through the apparatus; prevent a first type of message from the first wireless network and addressed to the second wireless network and/or one or more devices communicating over the second wireless network from being passed to the second wireless network; permit a second type of message from the first wireless network and addressed to the second wireless network and/or one or more devices communicating over the second wireless network to be passed to the second wireless network; prevent a third type of message from the second wireless network and addressed to the first wireless network and/or one or more devices communicating over the first wireless network from being passed to the first wireless network; and permit a fourth type of message from the second wireless network and addressed to the first wireless network and/or one or more devices communicating over the first wireless network to be passed to the first wireless network; wherein the first type of message includes a simple service discovery protocol (SSDP) presence message; wherein the second type of message includes a request for information embodied in a simple object access protocol (SOAP) request; wherein the third type of message includes a request for information embodied in a simple object access protocol (SOAP) request; and wherein the fourth type of message includes a simple service discovery protocol (SSDP) presence message.