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USER’S GUIDE
Switched Rack PDU
120
Port assignments
If a Telnet, FTP, SSH/SCP, or Web/SSL/TLS server uses a non-standard
port, a user must specify the port when using the client interface, such as a
Web browser. The non-standard port address becomes an extra
“password,” hiding the server to provide an additional level of security. The
TCP ports for which these servers listen are initially set at the standard “well
known ports” for the protocols. To hide the interfaces, use any port numbers
from 5000 to 32768.
User names, passwords, community names (SNMP)
All user names, passwords, and community names for SNMP are
transferred over the network as plain text. A user who is capable of
monitoring the network traffic can determine the user names and
passwords required to log on to the accounts of the control console or Web
interface of the Switched Rack PDU. If your network requires the higher
security of the encryption-based options available for the control console
and Web interface, be sure to disable SNMP access or set its access to
read-only. (Read-only access allows you to receive status information and
to use SNMP traps.)
Authentication versus Encryption
You can select to use security features for the Switched Rack PDU that
control access by providing basic authentication through user names,
passwords, and IP addresses, without using encryption. These basic
security features are sufficient for most environments in which sensitive
data are not being transferred.