> Services > Connectivity Service

Connectivity Service

The Connectivity services monitors whether or not a device is accessible on the network. By querying the device with Internet Control Message Protocol (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. This is due to 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


Instances on a Device


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 MSP 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 1 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 (2) seconds.

Packet Number

The number of packets to send for each scan. The default is 5.

Packet Size

The number of data bytes in each packet. The default is 32.

Default TTL

TTL (time to live) is the number of hops that a data packet must take before being discarded or returned. The default is 255

Status Details

Status Details


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, it will be Failed, based on the default settings.