Dns Proxy - Siemens SIMATIC NET SCALANCE S615 Configuration Manual

The table has the following columns:
● Select
Select the check box in the row to be deleted
● Name Server Address
Shows the IP address of the DNS server.
● Origin
Shows whether the DNS server was configured manually or assigned
4.4.14.2

DNS proxy

The device provides a DNS server for the local network. If you enter the IP address of the
device in the local application as a DNS server, then the device answers the DNS requests
from its cache.
If the device does not know the IP address for a domain address, it forwards the query to an
external DNS server. How long the device keeps a domain address in the cache depends on
the host being addressed. In addition to the IP address, a DNS request to an external DNS
server also supplies the life span of this information.
Description
The page contains the following boxes:
● "Enable DNS Proxy" check box
Enable or disable the proxy of the DNS server.
● "Cache Name Errors (NXDOMAIN)" check box
Enable or disable the caching of NXDOMAIN replies. If you enable the option, the domain
names that were unknown to the DNS server remain in the cache.
SCALANCE S615 Web Based Management
Configuration Manual, 05/2015, C79000-G8976-C388-02
Configuring with Web Based Management
4.4 "System" menu
109