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Page 186 / 324 Scroll up to view Page 181 - 185
Chapter 16 Remote Management
P-660HN-TxA User’s Guide
186
The following table describes the labels in this screen.
16.5
The SNMP Screen
Simple Network Management Protocol is a protocol used for exchanging
management information between network devices. 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 (SNMPv2c). The next figure illustrates an SNMP
management operation.
Figure 92
SNMP Management Model
Table 65
Advanced > Remote MGMT > FTP
LABEL
DESCRIPTION
Server 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.
Server Access
Select the interface(s) through which a computer may access the ZyXEL
Device using this service.
Secured Client
IP Address
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.
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Chapter 16 Remote Management
P-660HN-TxA User’s Guide
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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.
16.5.1
Configuring SNMP
To change your ZyXEL Device’s SNMP settings, click
Advanced > Remote MGMT
>
SNMP
tab. The screen appears as shown.
Figure 93
Advanced > Remote MGMT > SNMP
The following table describes the labels in this screen.
Table 66
Advanced > Remote MGMT > SNMP
LABEL
DESCRIPTION
Server Port
The SNMP agent listens on port 161 by default. If you change the SNMP
server port to a different number on the ZyXEL Device, for example
8161, then you must notify people who need to access the ZyXEL Device
SNMP agent to use the same port.
Server Access
Select the interface(s) through which a computer may access the ZyXEL
Device using this service.
Secured Client
IP Address
A secured client is a “trusted” computer that is allowed to access the
SNMP agent on the ZyXEL Device.
Select
All
to allow any computer to access the SNMP agent.
Choose
Selected
to just allow the computer with the IP address that you
specify to access the SNMP agent.
Page 188 / 324
Chapter 16 Remote Management
P-660HN-TxA User’s Guide
188
16.6
The DNS Screen
Use DNS (Domain Name System) to map a domain name to its corresponding IP
address and vice versa. Refer to
Chapter 7 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 94
Advanced > Remote Management > DNS
The following table describes the labels in this screen.
Apply
Click
Apply
to save your changes back to the ZyXEL Device.
Cancel
Click
Cancel
to begin configuring this screen afresh.
Table 66
Advanced > Remote MGMT > SNMP (continued)
LABEL
DESCRIPTION
Table 67
Advanced > Remote Management > DNS
LABEL
DESCRIPTION
Server Port
The DNS service port number is 53 and cannot be changed here.
Server Access
Select the interface(s) through which a computer may send DNS queries
to the ZyXEL Device.
Secured Client
IP Address
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.
Page 189 / 324
Chapter 16 Remote Management
P-660HN-TxA User’s Guide
189
16.7
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.
Note: If you want your device to respond to pings and requests for unauthorized
services, you may also need to configure the firewall anti probing settings to
match.
Figure 95
Advanced > Remote Management > ICMP
The following table describes the labels in this screen.
Table 68
Advanced > Remote Management > ICMP
LABEL
DESCRIPTION
ICMP
Internet Control Message Protocol is a message control and error-
reporting protocol between a host server and a gateway to the Internet.
ICMP uses Internet Protocol (IP) datagrams, but the messages are
processed by the TCP/IP software and directly apparent to the
application user.
Respond to
Ping on
The ZyXEL Device will not respond to any incoming Ping requests when
Disable
is selected. Select
LAN
to reply to incoming LAN Ping requests.
Select
WAN
to reply to incoming WAN Ping requests. Otherwise select
LAN & WAN
to reply to both incoming LAN and WAN Ping requests.
Apply
Click this to save your changes.
Cancel
Click this to restore your previously saved settings.
Page 190 / 324
Chapter 16 Remote Management
P-660HN-TxA User’s Guide
190

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