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Page 251 / 421 Scroll up to view Page 246 - 250
Chapter 17 Remote Management
P-660HN-FxZ Series User’s Guide
248
17.4
The FTP Screen
You can use FTP (File Transfer Protocol) to upload and download the ZyXEL Device’s
firmware and configuration files. Please see the User’s Guide chapter on firmware and
configuration file maintenance
for details. To use this feature, your computer must have an
FTP client.
Use this screen to specify which interfaces allow FTP access and from which IP address the
access can come. To change your ZyXEL Device’s FTP settings, click
Advanced > Remote
MGMT
>
FTP
. The screen appears as shown.
Figure 147
Advanced > Remote Management > FTP
The following table describes the labels in this screen.
17.5
The SNMP Screen
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.
Table 92
Advanced > 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 this to save your changes.
Cancel
Click this to restore your previously saved settings.
Page 252 / 421
Chapter 17 Remote Management
P-660HN-FxZ Series User’s Guide
249
"
SNMP is only available if TCP/IP is configured.
Figure 148
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.
Page 253 / 421
Chapter 17 Remote Management
P-660HN-FxZ Series User’s Guide
250
17.5.1
Supported MIBs
The ZyXEL Device supports MIB II, which 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.
17.5.2
SNMP Traps
The ZyXEL Device will send traps to the SNMP manager when any one of the following
events occurs:
17.5.3
Configuring SNMP
To change your ZyXEL Device’s SNMP settings, click
Advanced > Remote MGMT
>
SNMP
. The screen appears as shown.
Table 93
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 254 / 421
Chapter 17 Remote Management
P-660HN-FxZ Series User’s Guide
251
Figure 149
Advanced > Remote Management > SNMP
The following table describes the labels in this screen.
Table 94
Advanced > 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.
TrapCommunity
Type the trap community, which is the password sent with each trap to the
SNMP manager. The default is public and allows all requests.
TrapDestination
Type the IP address of the station to send your SNMP traps to.
Apply
Click this to save your changes.
Cancel
Click this to restore your previously saved settings.
Page 255 / 421
Chapter 17 Remote Management
P-660HN-FxZ Series User’s Guide
252
17.6
The DNS Screen
Use DNS (Domain Name System) to map a domain name to its corresponding IP address and
vice versa. Refer to
Chapter 6 on page 89
for background information.
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. This feature is not
available when the ZyXEL Device is set to bridge mode. Click
Advanced > Remote MGMT
>
DNS
to change your ZyXEL Device’s DNS settings.
Figure 150
Advanced > Remote Management > DNS
The following table describes the labels in this screen.
17.7
The ICMP Screen
To change your ZyXEL Device’s security settings, click
Advanced > Remote MGMT
>
ICMP
. The screen appears as shown.
If an outside user attempts to probe an unsupported port on your ZyXEL Device, an ICMP
response packet is automatically returned. This allows the outside user to know the ZyXEL
Device exists. Your ZyXEL Device supports anti-probing, which prevents the ICMP response
packet from being sent. This keeps outsiders from discovering your ZyXEL Device when
unsupported ports are probed.
Table 95
Advanced > 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 this to save your changes.
Cancel
Click this to restore your previously saved settings.

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