Lantronix G520 G520 User Guide - Page 205

17: Tunnel Field Description Local Port Set the port number for use as the network local port. The default local port number correlates with the tunnel instance:  Tunnel 1: 10001  Tunnel 2: 10002  Tunnel SPP Slave: 10003  Tunnel SPP Master: 10004 Protocol Select the desired security protocol:  SSL  TCP (default protocol)  TCP AES  Telnet Configure the protocol fields as determined by the protocol selection. Secure Protocols When using SSL, select the secure protocols and the SSL credential. Protocol options are:  SSL3  TLS1.0  TLS1.1 (default selected)  TLS1.2 (default selected)  TLS1.3 (default selected) TCP Keep Alive The TCP keep alive time is the time in which probes are periodically sent to the other end of the connection to ensure the other side is still connected. Enter the TCP Keep Alive time in milliseconds. Set to 0 to disable TCP Keep Alive, and blank the field to restore the default. TCP Keep Alive Interval Enter the time, in milliseconds, to wait between Keep Alive probes in order to keep the TCP connection up during idle transfer periods. Blank the field to restore the default. TCP Keep Alive Probes Enter the number of TCP Keep Alive probes to send before closing the connection if no response is received. The probes are sent after the initial TCP Keep Alive probe is sent. Valid values are between 1 and 16. Blank the field to restore the default. AES Encrypt Key Enter the AES Encrypt Key. This configuration field becomes available when the TCP AES protocol is selected. AES Encrypt Key Type Select Text or Hexadecimal to indicate format. This configuration field becomes available when the TCP AES protocol is selected. AES Decrypt Key Enter the AES Decrypt Key. This configuration field becomes available when the TCP AES protocol is selected. AES Decrypt Key Type Select Text or Hexadecimal to indicate format. This configuration field becomes available when the TCP AES protocol is selected. G520 Series IoT Cellular Gateway User Guide 205