how a name DNS can have several @ IP in different lan?

[MOULARD Guillaume OCISI]

Hi,=20

I have a delegation from my domain name. I want to create new services =
in my domain :=20
myservice.mydomain.com.

example for one of the 3 services:
In Internet, the good ip @ is: internet: myservice.mydomaine.com -> =
217.167.31.20
In my lan, there is a different @: private lan1: myservice.mydomaine.com =
-> 10.241.14.15
In other privale lan, the good adress is: private lan2: =
myservice.mydomaine.com -> 10.232.0.250

There is a NAT from lan 1 to lan 2=20
@lan2(10.232.0.250) -> @lan1(10.241.14.15)

All sercices in mydomaine.com are used by internet.=20
only 3 services in mydomaine.com are used in internet, lan1 and lan2
For these services, it is necessary to have exacly the same name, and =
the same domaine.

If I configure my DNS with 217.167.31.20, it is necessary to create 2 =
others DNS
and for each DNS syncronise manually all @ for services in =
mydomaine.com.

I don't know a better architecture ?=20
do you have some information, for a beginner in DNS.

Regards,=20
Guillaume Moulard=20