OUI issue NGINST-64002: Error occurred in validation of: “Host Name”
When installing an Oracle application using OUI (Oracle Universal Installer) sometimes it verifies if a given host is reachable.
Unfortunately, in my case, it was always failing:
![](https://jhartman.pl/wp-content/uploads/2019/10/image012.jpg)
All this despite the host was perfectly reachable using Ping:
![](https://jhartman.pl/wp-content/uploads/2019/10/image013.jpg)
So what was …