Nortel Networks 4050 Establishing a Telnet connection, Enabling and restricting Telnet access

772Chapter 16 The Command Line Interface

Establishing a Telnet connection

A Telnet connection offers the convenience of accessing the Nortel SNAS 4050 cluster from any workstation connected to the network. Telnet access provides the same options for user access and administrator access as those available through the console port.

When you use a Telnet connection to access the Nortel SNAS 4050 from a workstation connected to the network, the communication channel is not secure. All data flowing back and forth between the Telnet client and the Nortel SNAS 4050 is sent unencrypted (including the password), and there is no server host authentication.

To configure the Nortel SNAS 4050 cluster for Telnet access, you need to have a device with Telnet client software located on the same network as the Nortel SNAS 4050 device or cluster. The Nortel SNAS 4050 must have a RIP and a MIP. If you have already performed the initial setup by selecting new or join in the Setup menu, the assignment of IP addresses is complete.

When you are making configuration changes to a cluster of Nortel SNAS 4050 devices using Telnet, Nortel recommends that you connect to the MIP. However, if you want to halt or reboot a particular Nortel SNAS 4050 in a cluster, or reset all configuration to the factory default settings, you must connect to the RIP (the IP address of the particular Nortel SNAS 4050 device). To view the IP addresses of all Nortel SNAS 4050 devices in a cluster, use the /info/contlist command (see page 664).

Enabling and restricting Telnet access

Telnet access to the Nortel SNAS 4050 cluster is disabled by default, for security reasons. However, depending on the severity of your security policy, you may want to enable Telnet access. You may also restrict Telnet access to one or more specific machines.

For more information on how to enable Telnet access, see the /cfg/sys/adm/telnet command (see page 484). For more information on how to restrict Telnet access to one or more specific machines, see “Configuring the Access List using the CLI” on page 474.

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