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When an Stelnet client accesses an Stelnet server, it uses the locally saved host public key of the server
to authenticate the server. When acting as an Stelnet client, the device supports the first authentication by
default. When the device accesses an Stelnet server for the first time but it is not configured with the host
public key of the SSH server, it can access the server and locally save the server's host public key for
future use. In a secure network, the first authentication can simplify the configuration on the SSH client,
but it is not reliable.
To establish a connection to an Stelnet server: