| 摘要 |
An illustrative communication system provides remote access to target devices located behind a firewall or other network security gateway. The system includes an internal processor and target devices coupled to a network located inside the gateway, and an external processor and clients coupled to a network located outside the network security gateway, for example the Internet. The internal processor includes an application and a database containing the internal processor node number, the shared secret, and a static IP address of the external processor. The external processor includes an application and database containing the internal processor node number, the shared secret, port to port to target device address mapping, and authentication data for clients. Upon activation the internal processor initiates a persistent TCP session with the external processor. Client access to the targeted devices is provided upon a client connecting to a port of the external processor, the port associated with a target device. Multiple logical sessions between various clients and targeted devices are supported over and transparent to the single persistent TCP session.
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