C.8. Network Services; C.8.1. Network Services::dns Lookup; C.8.2. Network Services::ftp - Red Hat NETWORK SATELLITE 5.1.1 Reference Manual

Appendix C. Probes
Field
Warning Maximum Threads Running
Warning Minimum Threads Running
Critical Minimum Threads Running
Table C.36. MySQL::Threads Running settings

C.8. Network Services

The probes in this section monitor various services integral to a functioning network. When applying
them, ensure that their timed thresholds do not exceed the amount of time allotted to the timeout
period. Otherwise, an UNKNOWN status is returned in all instances of extended latency, thereby
nullifying the thresholds.

C.8.1. Network Services::DNS Lookup

The Network Services::DNS Lookup probe uses the dig command to see if it can resolve the system
or domain name specified in the Host or Address to look up field. It collects the following metric:
• Query Time — The time in milliseconds required to execute the dig request.
This is useful in monitoring the status of your DNS servers. To monitor one of your DNS servers,
supply a well-known host/domain name, such as a large search engine or corporate Web site.
Field
Host or Address to look up
Timeout*
Critical Maximum Query Time
Warning Maximum Query Time
Table C.37. Network Services::DNS Lookup settings

C.8.2. Network Services::FTP

The Network Services::FTP probe uses network sockets to test FTP port availability. It collects the
following metric:
• Remote Service Latency — The time it takes in seconds for the FTP server to answer a connection
request.
This probe supports authentication. Provide a username and password in the appropriate fields to
use this feature.The optional Expect value is the string to be matched against after a successful
connection is made to the FTP server. If the expected string is not found, the probe returns a
CRITICAL state.
Field
Expect
Username
Password
FTP Port*
224
Value
Value
10
Value
FTP
21