Linux Dns.GetHostEntry doesn't work on Linux

[denisvlah]

The Dns.GetHostEntry doesn't work at all on netcore 2.0.0 on Ubuntu.
It do work on windows netcore 2.0.0

Helpfully Dns.Resolve works on Linux as expected.

System.Net.Dns.GetHostEntry("192.168.1.21"); //fails with unreachable host
System.Net.Dns.Resolve("192.168.1.21"); // works on the same station on Linux.

I can see the same issue closed #20060 but I can reproduce this bug.

[denisvlah]

I have checked the netcore 2.0.2 the bug described above is fixed.
Closing the ticket.