Moxa VPORT 254-M-SC-T Manual de usuario descargar pdf (Pagina 64)

VPort 254 User’s Manual System Configuration

4-20

Accessible IP List

The VPort 254 uses an IP address-based filtering method to control access to the VPort.

Accessible IP Settings allow you to add or remove “Legal” remote host IP addresses to prevent

unauthorized access. Access to the VPort is controlled by IP address. That is, if a host’s IP address

is in the accessible IP table, then the host will be allowed access to the VPort. Administrators can

allow one of the following cases by setting this parameter:

y Only one host with a specific IP address can access the VPort. Enter “IP

address/255.255.255.255” (e.g., 192.168.1.1/255.255.255.255)

y Hosts on a specific subnet can access the VPort.

y Enter “IP address/255.255.255.0” (e.g., “192.168.1.0/255.255.255.0”)

y Any host can access the VPort. Disable this function.

Refer to the following table for more configuration examples.

Allowable Hosts Input Formats

Any host Disable

192.168.1.120 192.168.1.120/255.255.255.255

192.168.1.1 to 192.168.1.254 192.168.1.0/255.255.255.0

192.168.0.1 to 192.168.255.254 192.168.0.0/255.255.0.0

192.168.1.1 to 192.168.1.126 192.168.1.0/255.255.255.128

192.168.1.129 to 192.168.1.254 192.168.1.128/255.255.255.128

SNMP

VPort supports three SNMP protocols. The available protocols are SNMP V1, SNMP V2c, and

SNMP V3. SNMP V1 and SNMP V2c use a community string match for authentication, which

means that SNMP servers access all objects with read-only or read/write permissions using the

community string public/private (default value). SNMP V3, which requires you to select an

authentication level of MD5 or SHA, is the most secure protocol. You can also enable data

encryption to enhance data security. SNMP security modes and security levels supported by VPort

are shown in the following table. Select one of these options to communicate between the SNMP

agent and manager.

1 2 ... 59 60 61 62 63 64 65 66 67 68 69 ... 97 98

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Moxa VPORT 254-M-SC-T Manual de usuario Pagina 64