Closed
Description
openedon Oct 4, 2018
A call to
System.Net.Dns.GetHostAddresses(System.Net.Dns.GetHostName())
returns only the first local IP address when running on Linux.
Tested with .NET Core 2.1.3
Here is the repro code:
using System;
using System.Net;
using System.IO;
namespace ConsoleDnsTest
{
class Program
{
static void Main(string[] args)
{
string hostname = Dns.GetHostName();
Console.WriteLine("My hostname is '{0}'", hostname);
Console.WriteLine("My ip addresses are:");
foreach (var address in Dns.GetHostAddresses(hostname))
Console.WriteLine("\t{0}", address);
}
}
}Here is the (wrong) output I get on my Linux Debian 9:
root@inim-test:~# dotnet ConsoleDnsTest.dll
My hostname is 'inim-test'
My ip addresses are:
172.22.28.132
root@inim-test:~#
If I run the very same code under Mono, it works, and this is the correct output I get:
root@inim-test:~# mono ConsoleDnsTest.exe
My hostname is 'inim-test'
My ip addresses are:
172.22.28.132
172.22.28.133
172.22.28.134
172.22.28.138
10.128.0.1
root@inim-test:~#
On Windows both .NET Core and .NET Framework versions work well.
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