application 212 in node b for the security of the overall system neither table may be used to re construct the other table and neither table alone reveals the overall ip routing configuration from the remote terminal client 222 to the remote terminal server 223 the session managing application 218 in node a 202 maintains one or more tcp sessions and also routes the received data packets or files from the remote terminal client 222 via the proxy application 220 to the data sending application 210 the data sending application 210 is configured to send the data with the pre assigned channel numbers to node b 203 through the data sending interface 206 across the one way data link in link r 204 the data is then received by the data receiving application 212 in node b 203 through the data receiving interface 208 the data receiving application 212 then maps the channel numbers from the received data to the tcp session managing application 219 the session managing application 219 maintains one or more tcp sessions and routes the received data packets or files from the data receiving application 212 to the proxy application 221 the tcp proxy application 221 in node b fully implements the tcp ip protocol in its bilateral communications with the remote terminal server 223 requests a socket connection and delivers the data received from the.