ZyXEL Communications GS1920-48HPv2, Руководство пользователя

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Chapter 51 Troubleshooting
GS1920v2 Series User’s Guide
400
Adva nc e d Sug g e stio ns
• Try to access the Switch using another service, such as Telnet. If you can access the Switch, check the
remote management settings to find out why the Switch does not respond to HTTP.
I can see the
Lo g in
screen, but I cannot log in to the Switch.
1
Make sure you have entered the user name and password correctly. The default user name is
a dm in
,
and the default password is
1234
. These fields are case-sensitive, so make sure [Caps Lock] is not on.
2
You may have exceeded the maximum number of concurrent Telnet sessions. Close other Telnet
session(s) or try connecting again later.
Check that you have enabled logins for HTTP or Telnet. If you have configured a secured client IP
address, your computer’s IP address must match it. Refer to the chapter on access control for details.
3
Disconnect and re-connect the cord to the Switch.
4
If this does not work, you have to reset the device to its factory defaults. See Section 4.6 on page 54 .
Pop-up Windows, JavaScripts and Java Permissions
In order to use the web configurator you need to allow:
• Web browser pop-up windows from your device.
• JavaScripts (enabled by default).
• Java permissions (enabled by default).
I cannot see some of
A dva nc e d Applic a tio n
submenus at the bottom of the navigation panel.
The recommended screen resolution is 1024 by 768 pixels. Adjust the value in your computer and then
you should see the rest of
Adva nc e d Applic a tio n
submenus at the bottom of the navigation panel.
There is unauthorized access to my Switch via telnet, HTTP and SSH.
Click the
Displa y
button in the
Syste m Lo g
field in the
Ma na g e m e nt
>
Dia g no stic
screen to check for
unauthorized access to your Switch. To avoid unauthorized access, configure the secured client setting
in the
Ma na g e m e nt
>
Ac c e ss C o ntro l
>
Re m o te Ma na g e m e nt
screen for telnet, HTTP and SSH (see
Section 40.6 on page 356 ). Computers not belonging to the secured client set cannot get permission to
access the Switch.