global.asax code working fine in local but not after deploying on IIS

Question

I have below code in global.asax. I am getting remote_addr details in my local but not after deployment.

log4net.GlobalContext.Properties["username"] = System.Net.Dns.GetHostEntry(Request.ServerVariables["remote_addr"]).HostName.ToString();

Answer 1

To get the Host Name, you need to turn the reverse dns lookup on. It is a behavioral change in IIS. system.webServer/security/ipSecurity@doReverseDns and get the REMOTE_HOST server variable.