Ping probe

A ping probe sends an ICMP echo request to the target. It then expects an ICMP echo reply. If the response is not received, the probe fails.

HTTP probe

The HTTP probe sends an HTTP GET request to the target and expects a particular status code in response. The probe fails if there is no response or a different status code is received. Following are the parameters of an HTTP probe:

• Path—Server document path, which defaults to /.
• Port—Server port, which defaults to 80.
• Status code—Expected HTTP status code, which defaults to 200.

HTTPS probe

The HTTPS probe sends an HTTPS GET request to the target and expects a particular status code in response. The probe fails if there is no response or a different status code is received. An invalid SSL certificate also causes a failure by default. Following are the parameters of an HTTPS probe:

• Path—Server document path, which defaults to /.
• Port—Server port, which defaults to 443.
• Status code—Expected HTTPS status code, which defaults to 200.
• Certificate validation—Certificate validation enforcement enabled by default.

SNMP Probe

The SNMP probe sends an SNMP GET request to the target and expects a particular value at an OID. The probe fails if there is no response, or a different value is received. Following are the parameters of an SNMP probe:

• OID—Object identifier, in numbered dot notation, to look up.
• Value—Expected value.
• SNMP version—SNMP versions, which are 1 or 2.
• Community—SNMP community string, which defaults to public.