APC AP7900 Manual Do Utilizador

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.

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.)

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.