BinTec X4000, Руководство пользователя

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246 X4000 User’s Guide
Advanced Configuration of the Basic Unit with the Setup Tool
8
Proceed as follows to enter the system time in X4000 manually:
➤
Go to S
YSTEM
➧
T
IME AND
D
ATE
.
➤
Enter New Time.
➤
Enter New Date.
➤
Confirm the new system time with SET.
Current Time: shows the new system time set in
X4000 .
8.3.2 Name Resolution in X4000 with DNS Proxy
Why Name Resolution?
IP address = ? Name resolution is necessary for converting host names in a LAN or on the
Internet into IP addresses. For example, if you would like to reach the host
"Goofy" in your LAN or enter the URL "http://www.bintec.de" in your Internet
browser, you need the associated IP address before you can set up the required
connection. The following options are available:
■
DNS (Domain Name Server):
A DNS stores the relevant IP addresses for host names in the form of DNS
records and resolves the names if a relevant request is received, i.e. the
name server sends a DNS record with the IP address associated with the
name to the source of the request. Name servers form a hierarchical tree
structure. If a name server cannot resolve a name, it therefore asks a
higher-order name server, etc.
■
HOSTS files:
HOSTS files are located on the PCs in the LAN. You can use these files to
create a table of host names with associated addresses. This means
connections to DNS are no longer needed to resolve these names. As the
HOSTS files must be updated on each PC, this method of name resolution
is not very practicable.
If a method for deriving the time automatically is also defined in X4000 , the
values obtained automatically have higher priority. That is, if X4000 receives a
relevant time signal (e.g. from a time server), any system time entered
manually is overwritten.