NetApp StorageGRID Webscale SG6000 Series, Руководство пользователя

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If a port-level network connection is made to the remote host, but the host is not listening on one or
more of the selected ports, the “Port connectivity test failed” message appears in a yellow banner. The
nmap command output is listed below the banner.
Any remote port the host is not listening to has a state of “closed.” For example, you might see this
yellow banner when the node you are trying to connect to is in a pre-installed state and the
StorageGRID NMS service is not yet running on that node.
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If a port-level network connection cannot be made for one or more selected ports, the “Port connectivity
test failed” message appears in a red banner. The nmap command output is listed below the banner.
The red banner indicates that a TCP connection attempt to a port on the remote host was made, but
nothing was returned to the sender. When no response is returned, the port has a state of "filtered" and
is likely blocked by a firewall.
Ports with “closed” are also listed.
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