CO-tsend Tunnel Sender Service

The CO-tsend.exe BMC Defender Tunnel Sender Service is an optionally installed program, included with the WTS, that relays messages to the BMC Defender system server program using an encrypted, reliable TCP channel, including possible buffering of this data if a connection cannot immediate establish.

This type of program is often called a Tunnel since it provides a way to tunnel through firewalls and blocking routers in a highly secure manner. The program service is installed as part of the setup dialog, but must be manually enabled and configured, as described in this section. A network administrator can limit the number of firewall holes to a single point-to-point connection between the CO-tsend.exe and the BMC Defender program, using this function. The program also provides additional encryption and reliable TCP connections.

In order to use the CO-tsend.exe program, you must also configure the CO-trecv.exe BMC Defender Tunnel Receiver Service program on the main BMC Defender Server platform. This receiver program accepts messages from the CO-tsend.exe program, decrypts and authenticates these messages, and relays these messages to the appropriate processes running at the central BMC Defender Server. The configuration of both the CO-tsend.exe and CO-trecv.exe programs are in this section.

Note

The information herein is not required to install and use the CO-sysmsg.exe program but is provided only to support more advanced applications and requirements, with special emphasis on security and reliability of message delivery.

Additional notes

  • The CO-tsend.exe program can be configured at any Windows platform to create an encrypted TCP tunnel between that platform and the BMC Defender Server. The CO-trecv.exe program runs at the BMC Defender Server and must be enabled in order to receive messages from the CO-tsend.exe program.
  • Both the CO-tsend.exe and CO-trecv.exe programs make use of a configuration file, with the same name as the program, except with a .cnf (rather than an .exe) suffix. These configuration files are in the same folder as the program.
  • The default TCP port number, used for communication between the CO-tsend.exe and CO-trecv.exe programs, is TCP port 51462. This value can be changed. However, if the value changes in one configuration file, it must be changed in all configuration files.
  • Exactly one copy of CO-trecv.exe should normally be installed, to accept messages from one or more CO-tsend.exe programs. You can install one CO-tsend.exe program, and direct all traffic to that program, or can install multiple copies of the CO-tsend.exe program (such as one copy on each Windows platform).

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