Red Hat NETWORK 4.0 -, Reference Manual

Page: 255 / 290

Appendix C. Probes 239
C.8.10. Network Services::SSH
The Network Services::SSH probe determines the availability of SSH on the specified port
and collects the following metric:
•
Remote Service Latency — The time it takes in seconds for the SSH server to answer a
connection request.
Upon successfully contacting the SSH server and receiving a valid response, the probe dis-
plays the protocol and server version information. If the probe receives an invalid response,
it displays the message returned from the server and generates a WARNING state.
Field Value
SSH Port* 22
Timeout* 5
Critical Maximum Remote Service Latency
Warning Maximum Remote Service Latency
Table C-46. Network Services::SSH settings
C.8.11. Network Services::Web Server (HTTP)
The Network Services::Web Server (HTTP) probe determines the availability of the Web
server and collects the following metric:
•
Remote Service Latency — The time it takes in seconds for the HTTP server to answer
a connection request.
This probe confirms it can connect to the HTTP port on the specified host and retrieve the
specified URL. If no URL is specified, the probe will fetch the root document. The probe
looks for a HTTP/1. message from the system, unless you alter that value. Specifying
another port number will override the default port of 80. Unlike most other probes, this
probe will return a CRITICAL status if it cannot contact the system within the timeout
period.
This probe supports authentication. Provide a username and password in the appropriate
fields to use this feature. Also, the optional Virtual Host field can be used to monitor a
separate documentation set located on the same physical machine presented as a standalone
server. If your Web server is not configured to use virtual hosts (which is typically the case),
you should leave this field blank. If you do have virtual hosts configured, enter the domain
name of the first host here. Add as many probes as necessary to monitor all virtual hosts
on the machine.