I am facing a DNS issue due to NAT, i think dns doctoring can solve this but the scenario is a little different so not sure of the exact solution.
Attached is the network diagram. Exchange Server , DNS and Domain Controller are all located on a single physical server which has an IP 172.20.10.100. Both the server and the intenal users reside on the inside subnet. In the DNS the name-to-IP mapping is for example srv.abc.com -> 172.20.10.100. The Inside users have no connectivity issue.
The server is translated to 192.168.100.20 when accessing the outside network, this is a static translation
static (Inside,Outside) 192.168.100.20 172.20.10.100 netmask 255.255.255.255
The Branch users when they access they try to resolve srv.abc.com get the mapping to 172.20.10.100 which does not allow communication using name as Branch users cannot access 172.20.10.100 but they can access 192.168.100.20.
What needs to be configured on the ASA to resolve this issue ?
will this work
static (Inside,Outside) 192.168.100.20 172.20.10.100 netmask 255.255.255.255 dns