BinTec X4000, Руководство пользователя

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226 X4000 User’s Guide
Advanced Configuration of the Basic Unit with the Setup Tool
8
(name resolution). Domain Name Servers form a hierarchical tree structure. As
soon as a request is sent to a Domain Name Server, it tries to execute name
resolution using its internal tables. If it cannot find the name, it asks a higher-
level DNS that it knows.
If you use the DNS Proxy function, X4000 can save previously resolved names
and IP addresses in the cache and on receipt of a request first checks if the
desired address can be answered from the cache. This keeps the costs of
setting up WAN connections to name servers outside the LAN at a low level and
optimizes performance in the LAN, as requests to frequently used addresses or
addresses already resolved are answered by X4000 itself. How to configure the
DNS Proxy function is described in chapter 8.3.2, page 246 .
When you enter a WAN partner in X4000 , you can define whether X4000 sends
or answers requests for WINS or DNS IP addresses.
Configuration is made in:
■
IP
➧
S
TATIC
S
ETTINGS
■
WAN P
ARTNER
➧
E
DIT
➧
IP
➧
A
DVANCED
S
ETTINGS
Table 8-24: IP
➧
S
TATIC
S
ETTINGS
Field Meaning
Primary Domain Name
Server IP address of X4000 ’s first global Domain
Name Server (DNS).
Secondary Domain
Name Server IP address of another global Domain Name
Server.
Primary WINS IP address of X4000 ’s first global WINS
(Windows Internet Name Server) or NBNS
(NetBIOS Name Server).
Secondary WINS IP address of another global WINS or NBNS.