TCP connection check, measures the accessibility and performance of any port open to internet access for services offered. As is known, a sockey (IP address + port pair) means the endpoint used in communicating with another node / host, and the communication between the two sockets represents a single end to end connection. After selecting the address (IP and hostname) and port number to be monitored by TCP connection control, you can monitor the sockets we have mentioned. After you select the parameters, such as monitor address and frequency, you can set up your criteria for your monitor to be successful. These criteria are;

• Success of TCP connection request
• The response time (delay) is below a certain amount of time

After you select success criteria, you can also select failure criteria with data rule. The options are;

• Assume downtime, if any of the probe results are unsuccessful.
• Assume downtime, if all of the probe results are unsuccessful.
• Assume downtime, a specific ratio of the probe results are unsuccessful.

These selections allow you to choose how sensitive the measurements are to the fault. By selecting the following alarm criteria after the data rule, you can receive alarm notifications when there is an degredaton in performance that does not meet your defined success criteria. The alarm criteria are as follows:

• Alarm is active
• Notify if measurement is unsuccesful for a number of measurement periods
• Notify when the monitor is successful again
• Refresh alarm at a specific period of time

You can select the users you want to be notified whan an alarm occur, and then decide how you want to receive the notifications. Notification options include;

• Email
• webhook
• slack
• twitter DM
• Push notification (mobile applications)