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Page 271 / 427 Scroll up to view Page 266 - 270
P-2602H(W)(L)-DxA Series User’s Guide
Chapter 21 Remote Management Configuration
271
Figure 144
Remote Management: FTP
The following table describes the labels in this screen.
21.6
SNMP
Simple Network Management Protocol (SNMP) is a protocol used for exchanging
management information between network devices. SNMP is a member of the TCP/IP
protocol suite. Your ZyXEL Device supports SNMP agent functionality, which allows a
manager station to manage and monitor the ZyXEL Device through the network. The ZyXEL
Device supports SNMP version one (SNMPv1) and version two (SNMPv2). The next figure
illustrates an SNMP management operation.
Note:
SNMP is only available if TCP/IP is configured.
Table 107
Remote Management: FTP
LABEL
DESCRIPTION
Port
You may change the server port number for a service if needed, however you must
use the same port number in order to use that service for remote management.
Access Status
Select the interface(s) through which a computer may access the ZyXEL Device
using this service.
Secured Client IP
A secured client is a “trusted” computer that is allowed to communicate with the
ZyXEL Device using this service.
Select
All
to allow any computer to access the ZyXEL Device using this service.
Choose
Selected
to just allow the computer with the IP address that you specify to
access the ZyXEL Device using this service.
Apply
Click
Apply
to save your customized settings and exit this screen.
Cancel
Click
Cancel
to begin configuring this screen afresh.
Page 272 / 427
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272
Chapter 21 Remote Management Configuration
Figure 145
SNMP Management Model
An SNMP managed network consists of two main types of component: agents and a manager.
An agent is a management software module that resides in a managed device (the ZyXEL
Device). An agent translates the local management information from the managed device into
a form compatible with SNMP. The manager is the console through which network
administrators perform network management functions. It executes applications that control
and monitor managed devices.
The managed devices contain object variables/managed objects that define each piece of
information to be collected about a device. Examples of variables include such as number of
packets received, node port status etc. A Management Information Base (MIB) is a collection
of managed objects. SNMP allows a manager and agents to communicate for the purpose of
accessing these objects.
SNMP itself is a simple request/response protocol based on the manager/agent model. The
manager issues a request and the agent returns responses using the following protocol
operations:
•
Get - Allows the manager to retrieve an object variable from the agent.
•
GetNext - Allows the manager to retrieve the next object variable from a table or list
within an agent. In SNMPv1, when a manager wants to retrieve all elements of a table
from an agent, it initiates a Get operation, followed by a series of GetNext operations.
•
Set - Allows the manager to set values for object variables within an agent.
•
Trap - Used by the agent to inform the manager of some events.
21.6.1
Supported MIBs
The ZyXEL Device supports MIB II that is defined in RFC-1213 and RFC-1215. The focus of
the MIBs is to let administrators collect statistical data and monitor status and performance.
Page 273 / 427
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Chapter 21 Remote Management Configuration
273
21.6.2
SNMP Traps
The ZyXEL Device will send traps to the SNMP manager when any one of the following
events occurs:
21.6.3
Configuring SNMP
To change your ZyXEL Device’s SNMP settings, click
Advanced > Remote MGMT
>
SNMP
. The screen appears as shown.
Table 108
SNMP Traps
TRAP #
TRAP NAME
DESCRIPTION
0
coldStart (defined in
RFC-1215
)
A trap is sent after booting (power on).
1
warmStart (defined in
RFC-1215
)
A trap is sent after booting (software reboot).
4
authenticationFailure (defined in
RFC-1215
)
A trap is sent to the manager when receiving any
SNMP get or set requirements with the wrong
community (password).
6
whyReboot (defined in ZYXEL-
MIB)
A trap is sent with the reason of restart before
rebooting when the system is going to restart (warm
start).
6a
For intentional reboot:
A trap is sent with the message "System reboot by
user!" if reboot is done intentionally, (for example,
download new files, CI command "sys reboot", etc.).
6b
For fatal error:
A trap is sent with the message of the fatal code if the
system reboots because of fatal errors.
Page 274 / 427
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Chapter 21 Remote Management Configuration
Figure 146
Remote Management: SNMP
The following table describes the labels in this screen.
Table 109
Remote Management: SNMP
LABEL
DESCRIPTION
SNMP
Port
You may change the server port number for a service if needed, however you
must use the same port number in order to use that service for remote
management.
Access Status
Select the interface(s) through which a computer may access the ZyXEL Device
using this service.
Secured Client IP
A secured client is a “trusted” computer that is allowed to communicate with the
ZyXEL Device using this service.
Select
All
to allow any computer to access the ZyXEL Device using this service.
Choose
Selected
to just allow the computer with the IP address that you specify
to access the ZyXEL Device using this service.
SNMP Configuration
Get Community
Enter the
Get Community
, which is the password for the incoming Get and
GetNext requests from the management station. The default is public and allows
all requests.
Set Community
Enter the
Set community
, which is the password for incoming Set requests
from the management station. The default is public and allows all requests.
Trap
Community
Type the trap community, which is the password sent with each trap to the
SNMP manager. The default is public and allows all requests.
Destination
Type the IP address of the station to send your SNMP traps to.
Apply
Click
Apply
to save your customized settings and exit this screen.
Cancel
Click
Cancel
to begin configuring this screen afresh.
Page 275 / 427
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Chapter 21 Remote Management Configuration
275
21.7
Configuring DNS
Use DNS (Domain Name System) to map a domain name to its corresponding IP address and
vice versa. Refer to
Chapter 8 on page 107
for background information.
To change your ZyXEL Device’s DNS settings, click
Advanced > Remote MGMT
>
DNS
.
The screen appears as shown. Use this screen to set from which IP address the ZyXEL Device
will accept DNS queries and on which interface it can send them your ZyXEL Device’s DNS
settings.
Figure 147
Remote Management: DNS
The following table describes the labels in this screen.
21.8
Configuring ICMP
To change your ZyXEL Device’s security settings, click
Advanced > Remote MGMT
>
ICMP
. The screen appears as shown.
Table 110
Remote Management: DNS
LABEL
DESCRIPTION
Port
The DNS service port number is 53 and cannot be changed here.
Access Status
Select the interface(s) through which a computer may send DNS queries to the
ZyXEL Device.
Secured Client IP
A secured client is a “trusted” computer that is allowed to send DNS queries to the
ZyXEL Device.
Select
All
to allow any computer to send DNS queries to the ZyXEL Device.
Choose
Selected
to just allow the computer with the IP address that you specify to
send DNS queries to the ZyXEL Device.
Apply
Click
Apply
to save your customized settings and exit this screen.
Cancel
Click
Cancel
to begin configuring this screen afresh.

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