— Connections from joined appliances: [Management Appliance Only] A critical alert is
triggered after 10 minutes of a loss of connection.
— System load: A warning alert is triggered if the load average is greater than 50%.
— Report data backup: [Management Appliance Only] A critical alert is triggered if a scheduled
upload fails.
— Transaction log files archive: [Not available on Management Appliance] A critical alert
is triggered if a scheduled upload fails.
— Configuration backup: [Not available on Joined Web Appliance] A critical alert is triggered
if a scheduled upload fails.
— Connection to Sophos: A warning alert is triggered after two hours if the appliance is
unable to connect to the Sophos site to receive threat definitions or software updates. A
critical alert is issued if the appliance is unable to connect to the Sophos site after six hours.
— System updates: A critical alert is triggered when a system software update fails or if the
software is out of date.
— System reboot: A warning alert is triggered if there are pending updates that will cause
the Web Appliance to automatically reboot in the next available update window.
— Syslog server availability: A warning alert is triggered if the appliance is unable to connect
to its configured Syslog server.
— Active Directory integration: A critical alert is triggered if the appliance gets disconnected
from the Active Directory domain. If this occurs, click Verify Settings on the appliance’s
Configuration > System > Active Directory configuration page to ensure that the domain
controller is accepting connections. Ensure that the username and password supplied have
the relevant rights to access the domain and that your network is configured correctly to
allow the appliance to access the relevant ports on the domain controller. Contact Sophos
Technical Support if additional help is required.
— Active Directory synchronization: [Not available on Joined Web Appliance] The Web
Appliance synchronizes with the configured Active Directory server every 2 hours. If this
synchronization fails, a critical alert is raised.
— Active Directory Trusted Domains synchronization: [Not available on Joined Web
Appliance] If synchronization with a trusted (or child) domain fails, a warning alert is raised.
— eDirectory synchronization: [Not available on Joined Web Appliance] A critical alert is
triggered if the appliance has problems synchronizing with the eDirectory server.
— eDirectory user identification: [Not available on Management Appliance] A warning is
triggered if the appliance has encountered a problem obtaining user identification data from
the eDirectory server(s). A critical alert is triggered if the appliance has encountered problems
over an extended period of time when attempting to obtain user identification data from the
eDirectory server(s).
— Web categorization data update: An alert is triggered if the Web Appliance has problems
receiving web categorization data.
— Email alert delivery: A warning alert is triggered if the appliance has not been able to send
email notifications (EDNs) for 4 hours. A critical alert is triggered if the appliance has not
been able to send any EDNs for 72 hours.The appliance was either unable to connect to
an email server when trying to send an alert notice, or was unable to deliver the email to
190 | System Status | Sophos Web Appliance
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