![]() These can be found under the respective firewall rule. Source and destination heartbeats define the minimum required heartbeat from the source and destination, respectively. Source heartbeat and destination heartbeat Sophos security software isn't working correctly.This is based on the IP address or DNS resolution. Communication sent to a known bad host is detected.This traffic might lead to a command-and-control server involved in a botnet or other malware attack. Malicious network traffic is detected.You must take action if one or more of the following issues occur: A typical reason is that active malware has been detected and couldn’t be automatically removed. Red heartbeat statusĪ red status requires action. However, you can choose to take action when a PUA or malware is detected. Usually, it's temporary, and no action is required. A potentially unwanted application is detected.Twenty-four hours since the last signature update.A newly installed PUA (potentially unwanted application).No potentially unwanted application is detected.Sophos security software is working correctly.Green heartbeat statusĪ green heartbeat status requires no action and means that: Using these options may delay missing heartbeat notifications that you want to receive. Delay sending Missing Heartbeat status to Sophos Central: By default, Sophos Firewall directly sends information to Sophos Central about an endpoint going into the missing heartbeat status.In some cases, when switching between network adapters, specifically when switching from a wired to a wireless connection, this timeout can be too short. Increase the default timeout for missing heartbeat detection: The default timeout between the last received security heartbeat messages and moving the endpoint into a missing heartbeat status when still detecting network activity of the endpoint is set to 60 seconds.The customization options are as follows: To avoid frequent and misleading notifications about endpoints going into a missing heartbeat status after intentional actions, such as power off, suspend, hibernate, or moving to a different network adapter, you can customize the heartbeat detection behavior. The MAC address of an endpoint determines a missing heartbeat, and all interfaces are taken into account. When the endpoint sends the heartbeat again, Sophos Firewall considers it active. Sophos Firewall logs a heartbeat as missing when it doesn't receive three consecutive heartbeats from an endpoint that continues to send network traffic. Sophos Firewall sends a list of endpoints whose health status is red (at risk) or yellow (warning) every second heartbeat, every 30 seconds. ![]()
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