DNS Requirements

[petewatterschats]

Please correct me if I am wrong

For the 3CX system the only issue reguarding DNS is a resolution of the IP Address of the PC/Server Hosting the 3CX PBX so that only one FQDN A record is at issue.

Public FQDN resolved by DNS Server on the Internet and Private FQDN resolved by a DNS Server on the Private Network. One A Record each

In reviewing the Form and Documentation there seems to be a suggested difference between

External FQDN and Internal FQDN
and
Split DNS

To my mind they are one in the same

SPLIT DNS is where the IP Address to which a DNS Name resolves is dependent on the location of the client. Local Private Network Side Client DNS entries resolve to a different IP Addres than a Remote Client DNS entry resolves to its public counterpart.

So I have a PUBLIC DNS Server A record phone.csmi.com that points to my PUBLIC IP address

and

A private side DNS Server with an A Record phone.csmi.com that points to the private address of the 3CX server

If External FQDN and Internal FQDN
and
Split DNS

Are different can someone enlighten me

 

[cfive]

" So I have a PUBLIC DNS Server A record phone.csmi.com that points to my PUBLIC IP address

and

A private side DNS Server with an A Record phone.csmi.com that points to the private address of the 3CX server"

That would be "split DNS" - where a single FQDN points to two addresses, depending on where the DNS query is answered.

External and Internal would be like this:

Internal: phone.csmi.local - internal DNS resolver points to private lan IP.
External: phone.csmi.com - external DNS resolver points to public IP.

 

[petewatterschats]

Thanks, that is what I thought