Jetter AG
Identification and Configuration | 7
User Manual – JetControl 365MC
68 / 148
Step
Description
5
The controller tries to resolve the name into a related IP address by
sending a request to the DNS server.
If …
… then …
... the controller has resolved the
name,
... it enters the name and IP ad-
dress into the translation table;
→ proceed with step 6.
... the controller has not resolved
the name,
... the controller aborts the func-
tion, e.g. the system function for
sending an e-mail, and issues an
error message.
6
The controller uses the found IP address for further communication.
Tab. 45:
Name resolution
Configuration File
"hosts"
The
hosts
configuration file holds the static assignment between names and IP
addresses. During the boot phase, the JC-365MC reads the file once.
■
File format: Text
■
Location:
/etc
■
File name:
hosts
Domain Name
System (DNS)
If a name cannot be found in the
/etc/hosts
file, the JC-365MC tries to resolve
the IP address by DNS server request. During the boot process the JC-365MC
reads the IP address of the DNS server from the configuration memory.
