Access the cluster by using Telnet
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You can issue Telnet requests to the cluster to perform administrative tasks. Telnet is disabled by default.
The following conditions must be met before you can use Telnet to access the cluster:
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You must have a cluster local user account that is configured to use Telnet as an access method.
The
-application
parameter of thesecurity login
commands specifies the access method for a user account. For more information, see thesecurity login
man pages. -
Telnet must already be enabled in the management firewall policy that is used by the cluster or node management LIFs so that Telnet requests can go through the firewall.
By default, Telnet is disabled. The
system services firewall policy show
command with the-service telnet
parameter displays whether Telnet has been enabled in a firewall policy. For more information, see thesystem services firewall policy
man pages. -
If you use IPv6 connections, IPv6 must already be configured and enabled on the cluster, and firewall policies must already be configured with IPv6 addresses.
The
network options ipv6 show
command displays whether IPv6 is enabled. Thesystem services firewall policy show
command displays firewall policies.
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Telnet is not a secure protocol.
You should consider using SSH to access the cluster. SSH provides a secure remote shell and interactive network session.
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ONTAP supports a maximum of 50 concurrent Telnet sessions per node.
If the cluster management LIF resides on the node, it shares this limit with the node management LIF.
If the rate of in-coming connections is higher than 10 per second, the service is temporarily disabled for 60 seconds.
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If you want to access the ONTAP CLI from a Windows host, you can use a third-party utility such as PuTTY.
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From an administration host, enter the following command:
telnet hostname_or_IP
hostname_or_IP
is the host name or the IP address of the cluster management LIF or a node management LIF. Using the cluster management LIF is recommended. You can use an IPv4 or IPv6 address.
The following example shows how the user named “joe”, who has been set up with Telnet access, can issue a Telnet request to access a cluster whose cluster management LIF is 10.72.137.28:
admin_host$ telnet 10.72.137.28 Data ONTAP login: joe Password: cluster1::>