Allied Telesis AR400 Series Router - Manual (Page 45)

Getting Started with the Graphical User Interface (GUI) 45
Software Release 2.6.1
C613-02021-00 REV D
Problem The GUI is behaving inconsistently, or you cannot access some pages.
Solution ■ Delete your browser’s temporary files (see “Deleting Temporary Files” on
page 44) and try again.
■ Check that you are trying to access the GUI from a supported operating
system and browser combination. See “Browser and PC Setup” on page 24
for more information.
■ Check that JavaScript is enabled.
Problem The GUI does not seem to configure the router correctly.
Solution ■ Use the buttons on the GUI pages to navigate, not your browser’s Back,
Forward or Refresh buttons. The GUI’s navigation buttons perform aspects
of the configuration.
■ If you have enabled the firewall, check that your firewall access rules are
valid.
Traffic Flow and Network Address Translation (NAT)
Problem No traffic is passing through the router to or from the LAN, the DMZ or
both.
Solutions ■ Check that the router’s link to the LAN is functioning, by checking the
interface status (Monitoring) and that the link LED is lit. If the LED is not
lit, or the appropriate interfaces do not have an status of “active”:
• Check that the port is enabled (Configuration > Port > Settings)
• Check that the IP address of the interface is still valid.
• Check that the cables are connected correctly and function correctly.
■ If you have enabled the firewall, check that the correct interfaces are
attached to the policies (Configuration > Firewall > Interfaces > Interfaces
tab) and that your firewall access rules are valid.
■ Check the RIP configuration (Configuration > Internet Protocol > RIP).
• Check that the RIP neighbour can reach the router, by pinging the
router from the RIP neighbour. Note that you will not get a response if
Respond to ping
is unchecked on the Firewall Policy Options page
(Configuration > Firewall > Interfaces > Policy options tab). This option
is checked by default.
• Any password and authentication settings must be configured on the
neighbour as well as on this router.
■ Check that the router is passing the correct DNS information to hosts on
the LAN, if the router is a DHCP server. If the router acting as a DHCP
client as well, and therefore is passing on DNS information from another
DHCP server, check that this DHCP server is providing the router with the
correct information.
Problem A device on the LAN or DMZ can send some traffic out, but cannot receive
traffic.
Solution If you are using a static Standard NAT, this problem may indicate that NAT is
mapping to an invalid IP address. To check this, select Configuration > Firewall
> NAT.