As long as the unit receives responses for at least one of the protocols that you select, the unit assumes the server is operating and can forward packets. Responding to more than one protocol does not enhance the status of the server or interface. |
Interface | Select the interface to test. | |
Gateway IP | Enter the IP address of the gateway. | |
Ping Server | Enter the IP address of the server to test. | |
Detect Protocol | Select one of the following protocols. | |
ICMP Ping | Use standard ICMP ping to confirm that the server is responding. Ping confirms that the server can respond to an ICMP ping request. | |
TCP Echo | Use TCP echo to confirm that the server is responding. Select this option if the server is configured to provide TCP echo services. In some cases a server may be configured to reply to TCP echo requests but not to reply to ICMP pings. TCP echo uses TCP packets on port number 7 to send a text string to the server and expect an echo reply back from the server. The echo reply just echoes back the same text to confirm that the server can respond to TCP requests. FortiGate units do not recognize RST (reset) packets from TCP Echo servers as normal TCP echo replies. If the unit receives an RST response to a TCP echo request, the unit assumes the server is unreachable. | |
UDP Echo | Use UDP echo to detect the server. Select this option if the server is configured to provide UDP echo services. In some cases a server may be configured to reply to UDP echo requests but not to reply ICMP pings. UDP echo uses UDP packets on port number 7 to send a text string to the server and expects an echo reply from the server. The echo reply just echoes back the same text to confirm that the server can respond to UDP requests. | |
Ping Interval | Enter the interval between pings, in seconds. | |
Failover Threshold | Enter the number of times the test can fail before the unit assumes that the interface cannot connect to the server. | |
HA Priority | Set the HA priority, if configuring an HA cluster. |