A system and method is disclosed for transporting application data through a communications tunnel between a host device and a guest device that each includes networked processors. The application data may be transported between the host device and the guest device through an allowed port of the host device, the communications tunnel, and a port of the guest device. Based on logon credentials, the guest device can be authenticated by a security server and a role may be determined. The role can include allowed ports and associated applications on the host that the guest is allowed to access. Remote access from the guest device to host devices or remote devices may be enabled without needing prior knowledge of their configurations. Secure access may be facilitated to remote host devices or remote devices, according to security policies that can vary on a per-session basis and takes into account various factors.