Speed Touch Dns Resolving - Alcatel SPEED TOUCH PRO User Manual

13 Networking Services - DNS

13.1 Speed Touch DNS Resolving

Introduction
Local DNS resolving
Example of local DNS
resolving
Result of local DNS
resolving
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The STPro features a DNS server for the locally attached PCs, and
as DNS relay for non local DNS hostnames.
The same mechanism for resolving computer names to IP
addresses when browsing the Internet, applies to your local
network.
Instead of using the IP addresses for a local IP node e.g.
10.0.0.138 for the STPro, you can give your nodes names and let
a local DNS server, e.g. the STPro itself, do the resolving.
In the following example, a LAN is built around the STPro.
In this scenario, it is assumed that the STPro acts as DHCP server,
and as DNS server for the local network.
During start up, a first PC launches a DHCP request on the LAN.
One of the fields in the DHCP request contains the computer
name e.g. YourPC.
The STPro reacts by intercepting this request and returns a DHCP
reply containing:
The IP address for his computer, e.g. 10.0.0.1
"
The local domain name, e.g. lan (default)
"
The IP address of the local DNS server, e.g. 10.0.0.138 being
"
the STPro (default).
A second PC, named MyPC, is powered on and is configured via
a DHCP reply as below:
The IP address for his computer, e.g. 10.0.0.2
"
The local domain name, i.e. lan
"
The IP address of the local DNS server, i.e. 10.0.0.138
"
In the example scenario, it is now possible to ping both PCs,
MyPC and YourPC, by referring to their computer names instead of
their IP addresses.
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