The method of obtaining the real IP address of the user by ASP

Get User IP address in ASP our easiest way to get here is to use the

The code is as follows	Copy Code
Request.ServerVariables ("REMOTE_ADDR")

However, if the user uses the proxy server IP address is not correct, but we can pass

The code is as follows	Copy Code
Request.ServerVariables ("REMOTE_ADDR")

Results The above two methods of obtaining IP can be operated as follows

The code is as follows	Copy Code
Userip = Request.ServerVariables ("Http_x_forwarded_for") If Userip = "" Then Userip = Request.ServerVariables ("REMOTE_ADDR")

The above is just a simple method of judging, in the actual application we may encounter more cases, the following look a good example

The code is as follows

Copy Code

<%private Function getip () Dim stripaddr If request.servervariables ("http_x_forwarded_for") = "" OR InStr (Request.serverv Ariables ("Http_x_forwarded_for"), "Unknown") > 0 Then stripaddr = Request.ServerVariables ("remote_addr") ElseIf InStr (Request.ServerVariables ("Http_x_forwarded_for"), ",") > 0 Then stripaddr = Mid ( Request.ServerVariables ("Http_x_forwarded_for"), 1, InStr (Request.ServerVariables ("Http_x_forwarded_for"), ",")-1 ElseIf InStr (Request.ServerVariables ("Http_x_forwarded_for"), ";") > 0 Then stripaddr = Mid (request.server Variables ("Http_x_forwarded_for"), 1, InStr (Request.ServerVariables ("Http_x_forwarded_for"), ";") 1) Else Stripaddr = Request.ServerVariables ("http_x_forwarded_for") End If GetIP = Trim (Mid stripaddr , 1) End Function Ip=getip () Response.Write (IP) %>

This can almost get the user's real IP address, but also can not save all the agents are able to obtain, but we all use the above method.

If you have friends who use ASP.net, refer to the following methods to obtain

The code is as follows

Copy Code

Method One HttpContext.Current.Request.UserHostAddress; Method Two httpcontext.current.request.servervariables["REMOTE_ADDR"]; Method Three String strhostname = System.Net.Dns.GetHostName (); String clientipaddress = System.Net.Dns.GetHostAddresses (strhostname). GetValue (0). ToString (); Method IV (ignoring the agent) httpcontext.current.request.servervariables["Http_x_forwarded_for"]; Method Five var ip = ' <!--#echo var= ' remote_addr '--> '; Alert ("Your IP address is" +IP); //Method VI (ignoring proxy) function getlocalipaddress () {     var obj = null;     var rslt = "";     try     {         obj = new Activexob Ject ("Rcbdyctl.") Setting ");         rslt = obj. getipaddress;         obj = null;    }     catch (E)     {        //    }          return rslt; }