Hello.
Can anyone tell me what is "Internal" and "External" parts in "named.conf" file?

For example "http://www.server-world.info/en/note?os=CentOS_7&p=dns"

Thank you.

BIND lets you run multiple "views" of data depending on the end user of the data.

For example you have a medium/large sized company with it's own single data center which hosts all of their servers including their external facing website and DNS servers.

In that example you would split the DNS data into two different views to stop hackers trying to gain information about the internal network structure by probing the DNS server for random records.

It might also be done because the company uses RFC1918 addresses for internal users and has a limited number of public IP addresses showing to the outside world. Allowing DNS lookups to return RFC1918 addresses over the Internet is a bad idea so you only show the public addresses and ignore the rest for external users.

You don't need to use views but it is another way you can run your DNS server if it suits your particular situation.

I just want to configure a DNS for local network. Must I define "Internal" Or "External" ?

Hi,

You will need to define internal and external name servers for configuring a DNS for local network. Here's a guide on what is DNS and it's configuration - http://forums.bodhost.com/archive/index.php/t-388.html

Then in your case, in one of the conf (named.conf) add the below setting

In some tutorials never defined "Internal" and "External" parts for internal DNS server. I guess these parts are for Web servers!!!!

Most tutorials for BIND are not designed for the complicated configurations that use internal/external views.

And if your after a basic DNS resolver then you do not need any view configuration at all.

Your post shows you do not even know about the view feature in BIND as your talking about something completely unrelated.

I just want to a DNS server for internal network, Something like Windows DNS server for a local network. I want to know for my goal, Must I define Internal and External?

No.

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Thank you a lot.