Chapter 16 Local Services; Dns - Funkwerk W1002 Manual

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bintec W1002/W1002n/W2002/WIx040/WIx065

Chapter 16 Local services

16.1 DNS

Each device in a TCP/IP network is usually located by its IP address. Because host names
are often used in networks to reach different devices, it is necessary for the associated IP
address to be known. This task can be performed by a DNS server, which resolves the
host names into IP addresses. Alternatively, name resolution can also take place over the
HOSTS file, which is available on all PCs.
Your device offers the following options for name resolution:
• DNS Proxy, for forwarding DNS requests sent to your device to a suitable DNS server.
This also includes specific forwarding of defined domains (Forwarded Domains).
• DNS cache, for saving the positive and negative results of DNS requests.
• Static entries (Static Hosts), for manually defining or preventing assignments of IP ad-
dresses to names.
• DNS monitoring, for providing an overview of DNS requests on your device.
Global Name Server
The IP addresses of global name servers that are queried if your device is unable to an-
swer requests itself or by forwarding entries are entered in Local Services -> DNS ->
Global Settings -> Basic Parameters.
For local applications, the IP address of your device or the general loopback address
(127.0.0.1) can be entered as the global name server.
Your device can also receive the global name servers dynamically and transfer them dy-
namically if necessary.
Strategy for name resolution on your device
A DNS request is handled by your device as follows:
(1) If possible, the request is answered directly from the static or dynamic cache with IP
address or negative response.
(2) Otherwise, if a suitable forwarding entry exists, the relevant DNS server is asked, de-
pending on the configuration of the Internet or dialin connections, if necessary by set-
ting up a WAN connection at extra cost. If the DNS server can resolve the name, the
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