Help please {No Such host is known} error

Question

I am using the following code under windows 2016 Standard Server IIS10 - .NET Framework 4.0 Goal to obtain the remote client computer name. C# Code Behind Default.aspx.cs var RemoteClient_DevineName = System.Net.Dns.GetHostEntry(HttpContext.Current.Request.ServerVariables[ "REMOTE_HOST" ]).HostName; Result is this error message below Server Error in '/' Application. No such host is known Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Net.Sockets.SocketException: No such host is known Source Error: An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. Stack Trace: [SocketException (0x2af9): No such host is known] System.Net.Dns.InternalGetHostByAddress(IPAddress address, Boolean includeIPv6) +2943591 System.Net.Dns.GetHostEntry(String hostNameOrAddress) +8625688 Thank you for your help.

Sachin Singh · Answer

string clientMachineName; clientMachineName = (Dns.GetHostEntry(Request.ServerVariables[ "remote_addr" ]).HostName); Or string IP = Request.UserHostName; IPAddress myIP = IPAddress.Parse(IP); IPHostEntry GetIPHost = Dns.GetHostEntry(myIP); List string > compName = GetIPHost.HostName.ToString().Split( '.' ).ToList(); string mycompNameRemote = compName[0];

Jose Saiz · Answer

Thank you Sachin for your reply, I've tried with REMOTE_ADDR as well and got the same error message. It is unbelievable how Microsoft is losing their programming ground, every time they make any changes to either the OS or the visual studio they end up messing up the good things. The above mentioned code was working fine until all Microsoft patches came about, no wonder Python is leading the programming business. Thanks again Sachin Singh