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3.17 Security Settings
Note: You can change these settings via Telnet or serial connections only, not on the Web-Manager. We recommend
that you set security over the dedicated network or over the serial setup. If you set parameters over the network (Telnet
9999), someone else could capture these settings.
Caution: Disabling both Telnet Setup and Port 77FE will prevent users from accessing the setup menu from the
network. Disabling Port 77FE also disables the Web from configuring the device.
Disable SNMP (N)
SNMP Community Name (public):
Disable Telnet Setup (N)
Disable TFTP Firmware Update (N)
Disable Port 77FEh (N)
Disable Web Server (N)
Disable Web Setup (N)
Disable ECHO ports (Y)
Enable Encryption (N) (Only if Encrypted NET485)
Enable Enhanced Password (N)
Disable Port 77F0h (N)
3.17.1 Disable SNMP
This setting allows you to disable the SNMP protocol on the unit for security reasons.
3.17.2 SNMP Community Name
This option allows you to change the SNMP Community Name on the unit. This allows for ease of
management, and possibly some security. If someone tries to violate security but doesn’t know what
community to connect to, that person will be unable to get the SNMP community information from the unit.
The name is a string of 1 to 13 characters plus a null-terminator (14 bytes total). The default setting is
public.
3.17.3 Disable Telnet Setup
Note: If you choose to disable this option, keep in mind that disabling both Telnet Setup and Port 77FE will prevent
users from accessing the setup menu from the network.
This setting defaults to the N (No) option. The Y (Yes) option disables access to this Configuration Menu by
Telnet (port 9999). It only allows access locally via the Web pages and the serial port of the unit.
3.17.4 Disable TFTP Firmware Upgrade
This setting defaults to the N (No) option. The Y (Yes) option disables the use of TFTP to perform network
firmware upgrades. With this option, firmware upgrades can be downloaded over the serial port using
Device Installer’s Recover Firmware procedure.
3-42 NET485 User Guide