[ENG] 3.11. [DKSF 253.6 IU] What Notifications Are Displayed in a System Log?
The page «Log» of a device web interface represents the operation of a device. All events of a device are registered in a log chronologically. All notifications of the log are duplicated via SYSLOG protocol if an IP address of the SYSLOG server is specified in the settings of a device.
A system log is located in a nonvolatile memory. All notifications are registered in a circle, which means that the oldest notification in a log is rewritten by a new one.
The first time tag in a log is 01.01.70 Mon 00:00: 00.UTC. If an IP address of an NTP server is specified in the settings of a device, a device will try to get a precise time and if successful it will synchronize its internal clock with a precise time. After synchronizing time, two records that represent a time jump when resetting the clock to a precise time will appear in a log. If the time received while synchronizing with an NTP server is different from the time of the internal clock for less than 5 minutes, the clock will not be reset. Instead, a pace of internal clock will be changed in the way to fit a precise time, received from an NTP server in a certain period of time. Thanks to this, there is no time jumps in the list of events in the log, which simplifies its analysis.
Starting the operation (Rebooting) XXXX YYYY – is recorded in the log when rebooting or switching on a device. XXXX – is a model name of a device. YYYY – is a firmware version, which is installed in a device.
Resetting......clock – is recorded in the log if the time, received via an NTP protocol is different for more than 5 minutes from the time, set at the internal clock of a device. A notification is displayed in 2 lines. The first line represents a time tag before resetting the internal clock, the second line represents a time tag right after resetting the internal clock.
Device parameters are reset (starting with a clicked Reset button) – is recorded into a log when resetting parameters of a device into default settings by the «Reset» button.
Events from IO Lines
ION=Y XXXX ZZZZ – is recorded in the log when an IO line changes its current logic level (switches from the status «0» into the status «1» and vice versa) and notifications in a log from the IO line are enabled. N – is a number of an IO line. Y – is a current logic level of an IO line. XXXX – is a description of an IO line, which is set by a user at the page «INPUT-OUTPUT» of a device web-interface, ZZZZ – is a description of a logic level of an IO line, which is set by a user in the window of configuring notifications for an IO line.
Events from the Module of Sending E-mail Notifications
sendmail: in a response to XXXX YYYY is received – it is recorded in a log if a server returns an «incorrect» response code. XXXX – is a service information: authentication method or a notification addressee. YYYY – is a notification about an error.
sendmail: a message is dismissed – is recorded in the log if it is impossible to send an e-mail to an SMTP server.
No room for new mail message XXXX – is recorded in the log if a notification queue is overfilled. XXXX – is a client request and a server response.
All notifications in the log are duplicated by sending notifications via the SYSLOG protocol if an address of the SYSLOG server is set at the page «SETUP» of a device web interface.
SYSLOG server is convenient to use for a centralized collection of notifications about events that take place at numerous devices and computers, which operate at the network, including NetPing devices.