Allied Telesis AR400 Series Router - Manual (Page 36)

36 AR400 Series Router User Guide
Software Release 2.5.2
C613-02034-00 REV A
• The IP addresses the rules apply to are entered correctly, and actually
belong to the specified devices.
• The rules apply to the correct days and time.
■ If an IP address-based rule exists to block traffic from this particular
device, check that the device has a permanently-assigned IP address.If the
router is assigning IP addresses as a DHCP server, you can give the
required device a permanent IP address by making it a static entry
(Configuration > DHCP Server).
Problem You have created a Firewall rule to allow (or deny) FTP traffic, selecting FTP
as the Common Service, but passive FTP traffic is still dropped (or allowed).
Solution The FTP service in the Common Service list is only active FTP.
IP Addresses and DHCP
Problem You have selected Quick Start > WAN > DHCP, but the router hasn’t been
given an IP address.
Solution ■ Check that the router’s domain and host name are correct (Configuration >
System > General).
■ Check that the DHCP server can reach the router, by pinging the router
from the DHCP server. 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.
Problem The router is enabled as a DHCP server, but cannot assign an IP address to a
host.
Solution ■ Reboot the host machine.
■ Check the host’s TCP/IP settings, to make sure that the host is set to obtain
its IP address dynamically:
In Windows 95/98, click Settings > Control Panel > Network. Select TCP/
IP and click Properties. Click Obtain an IP address automatically.
In Windows 2000, click Settings > Control Panel > Network and Dial-up
Connections > Local Area Connection > Properties. Select Internet
connection (TCP/IP) and click Properties. Click Obtain an IP address
automatically
.
■ Check that the DHCP server has a large enough range of addresses
(Configuration > DHCP Server).
■ Check that the router’s link to the LAN is functioning, by checking that the
port has a green icon on the System Status page (Monitoring > System),
and that the link LED is lit (see “Accessing the GUI” on page 32).