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P-660HN-TxA User’s Guide
181
C
HAPTER
16
Remote Management
16.1
Overview
Remote management allows you to determine which services/protocols can access
which ZyXEL Device interface (if any) from which computers.
The following figure shows remote management of the ZyXEL Device coming in
from the WAN.
Figure 88
Remote Management From the WAN
Note: When you configure remote management to allow management from the WAN,
you still need to configure a firewall rule to allow access.
You may manage your ZyXEL Device from a remote location via:
•
Internet (WAN only)
•
LAN only
•
LAN and WAN
•
None (Disable)
To disable remote management of a service, select
Disable
in the corresponding
Service Access
field.
You may only have one remote management session running at a time. The ZyXEL
Device automatically disconnects a remote management session of lower priority
LAN
WAN
HTTP
Telnet
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182
when another remote management session of higher priority starts. The priorities
for the different types of remote management sessions are as follows.
1
Telnet
2
HTTP
16.1.1
What You Can Do in the Remote Management Screens
•
Use the
WWW
screen (
Section 16.2 on page 183
) to configure through which
interface(s) and from which IP address(es) users can use HTTP to manage the
ZyXEL Device.
•
Use the
Telnet
screen (
Section 16.3 on page 184
) to configure through which
interface(s) and from which IP address(es) users can use Telnet to manage the
ZyXEL Device.
•
Use the
FTP
screen (
Section 16.4 on page 185
) to configure through which
interface(s) and from which IP address(es) users can use FTP to access the
ZyXEL Device.
•
Your ZyXEL Device can act as an SNMP agent, which allows a manager station to
manage and monitor the ZyXEL Device through the network. Use the
SNMP
screen (see
Section 16.5 on page 186
) to configure through which interface(s)
and from which IP address(es) users can use SNMP to access the ZyXEL Device.
•
Use the
DNS
screen (
Section 16.6 on page 188
) to configure through which
interface(s) and from which IP address(es) users can send DNS queries to the
ZyXEL Device.
•
Use the
ICMP
screen (
Section 16.7 on page 189
) to set whether or not your
ZyXEL Device will respond to pings and probes for services that you have not
made available.
16.1.2
What You Need to Know About Remote Management
Remote Management Limitations
Remote management does not work when:
•
You have not enabled that service on the interface in the corresponding remote
management screen.
•
You have disabled that service in one of the remote management screens.
•
The IP address in the
Secured Client IP Address
field does not match the
client IP address. If it does not match, the ZyXEL Device will disconnect the
session immediately.
•
There is already another remote management session with an equal or higher
priority running. You may only have one remote management session running
at one time.
•
There is a firewall rule that blocks it.
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183
Remote Management and NAT
When NAT is enabled:
•
Use the ZyXEL Device’s WAN IP address when configuring from the WAN.
•
Use the ZyXEL Device’s LAN IP address when configuring from the LAN.
System Timeout
There is a default system management idle timeout of five minutes (three
hundred seconds). The ZyXEL Device automatically logs you out if the
management session remains idle for longer than this timeout period. The
management session does not time out when a statistics screen is polling.
16.2
The WWW Screen
Use this screen to specify how to connect to the ZyXEL Device from a web
browser, such as Internet Explorer.
Note: If you disable the
WWW
service in the
Remote MGMT > WWW
screen, then
the ZyXEL Device blocks all HTTP connection attempts.
16.2.1
Configuring the WWW Screen
Click
Advanced > Remote MGMT
to display the
WWW
screen.
Figure 89
Advanced > Remote MGMT > WWW
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184
The following table describes the labels in this screen.
16.3
The Telnet Screen
You can use Telnet to access the ZyXEL Device’s command line interface. Specify
which interfaces allow Telnet access and from which IP address the access can
come.
Click
Advanced > Remote MGMT
>
Telnet
tab to display the screen as shown.
Figure 90
Advanced > Remote MGMT > Telnet
Table 63
Advanced > Remote Management > WWW
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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185
The following table describes the labels in this screen.
16.4
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 91
Advanced > Remote MGMT > FTP
Table 64
Advanced > Remote Management > Telnet
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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