In development environment Used Self-signed certificate.
That's succeeded.
But customer environment used same certificate,it's failed app installation.
customer environment is closed network.
I tried at development environment.
First,My device set to can't connect internet.
Next,I tried app installation but it's failed.
I think enterprise app OTA has not supported at closed network.
I suggest, open on specific port and IP on firewall.
If there're some authentication at OTA,I have to pass through that.
If you know,please tell me those IP range and port.
Thanks.
Firewall requirements when installing an Enterprise app OTA are at the bottom of this page.
Also, the devices will need periodic access to the apple server (probably the same one as given above) after the app is installed. See the message from user ebarth03 on June 7 in this thread.