Connectivity service
The Connectivity services monitors if a device is accessible on the network. By querying the device with ICMP packets, the Connectivity service can alert you when the device is not accessible from the network in the same manner as the ping command.
The Connectivity service may not function properly when monitored by probes installed on systems using Windows Vista, because of the default setting in Windows Firewall with Advanced Security that does not allow incoming ICMP Echo messages. This may be resolved by enabling ICMP Echo messages through the creation of new inbound custom rules to allow ICMPv4 and ICMPv6 Echo Requests. For more information, see the Microsoft documentation on Windows Firewall with Advanced Security.
| Service Type | TCP/ICMP |
| Instances on a Device | 1 |
| Device Class | Server - Generic, Workstation - Generic, Other, Printer, Scanner/Camera, Switch/Router, Laptop - Windows, Server - Windows, and Workstation - Windows |
| Monitored By | Windows probe, Central Server |
| Scan Interval | 5 minutes |
| Timeout Value | The time in seconds that the N-able N-central server waits before considering the test a failure. The default is 30 seconds. |
| Packet Interval | The time in milliseconds between packets. The default is one millisecond. To define the packet interval in full seconds, the value must be expressed in units of one thousand. For example, a packet interval of 2000 will be 2,000 milliseconds or two seconds. |
| Packet Number | The number of packets to send for each scan. The default is five. |
| Packet Size | The number of data bytes in each packet. The default is 32. |
| Default TTL | TTL is the number of hops that a data packet must take before being discarded or returned. The default is 255. |
Status details
| Status Details | Description |
| Packet Loss (percentage) | A packet is dropped when its TTL value reaches zero or when the remote host is unreachable. When a packet is dropped, the echoed packet is never received. |
| Time to Live (hops) | A state transition for the service occurs when the threshold value exceeds the specified range for any of these threshold types. |
| Round Trip Time (ms) | The time for a request to be sent and received. |
| DNS Resolution | The threshold that determines whether the device name can be resolved. If an FQDN has been specified, the service searches for its IP address. If the IP address is found, the state will be Normal. Otherwise, it will be Failed, based on the default settings. If an IP address has been specified, the service checks only the IP address's format. If the format is correct, the state will be Normal. Otherwise, the state will appear as Failed, based on the default settings. |
Default Thresholds
| Normal | 0 - 5% |
| Warning | 4 - 15% |
| Failed | 14 - 100% |