Find a visitor’s IP Address in ASP at DiscoMoose

Find a visitor’s IP Address in ASP

Published 2 years, 12 months ago in ASP and ASP Basics

Do you want to know the IP address of a visitor? This can be useful for many reasons, such as tracking site usage or blocking access to specific people. Here's how you can find it.

In an ASP page, within the ASP tags, <% ... %>, you can retrieve the IP address of a user through the ServerVariables collection of the Request object. To do this, you use the code Request.ServerVariables("REMOTE_ADDR").

Display The IP Address

So, if you want to display the IP Address to the user then the following page will suffice:

Click here to view the below code as plain text

ASP:

<%@language="VBScript"%>
<%
Response.Write "Hello! Your IP Address is: " & Request.ServerVariables("REMOTE_ADDR")
%>

Exploring Request.ServerVariables

You might be wondering what other information you can get from Request.ServerVariables, well you can find out with the following script which displays all the variables in it along with their values if set, in a HTML table:

Click here to view the below code as plain text

ASP:

<%@language="VBScript"%>
<table border="1">
<tr><th>Variable</th><th>Value</th></tr>
<%
Dim variable
For Each variable In Request.ServerVariables
Response.Write "<tr><td>" & variable & "</td>"
Response.Write "<td>" & Request.ServerVariables(variable) & "</td></tr>"
Next
%>
</table>

Improving the find IP code

Finally, the following code works harder to find the true IP of the user by checking to see if the visitor is using a proxy:

Click here to view the below code as plain text

ASP:

Function UserIP()
’ This returns the True IP of the client calling the requested page
’ Checks to see if HTTP_X_FORWARDED_FOR has a value then the client is operating via a proxy
UserIP = Request.ServerVariables ( "HTTP_X_FORWARDED_FOR" )
If UserIP = "" Then
UserIP = Request.ServerVariables ( "REMOTE_ADDR" )
End if
End Function

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8 Responses to “Find a visitor’s IP Address in ASP”

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1 bob May 16th, 2006 at 11:37 pm

Helped a LOT! Thanks very much!
2 Runner90 Aug 16th, 2006 at 7:44 am

How Can I transfer this IP Address to a Log File in My HostMachine….
3 radu Aug 23rd, 2006 at 3:52 pm

Hi there,

I have a problem with finding out the real IP of the visitor. Looks that the simple code:
Request.ServerVariables(”REMOTE_ADDR”)
is not working and I always get the IP of the server instead.

Do you have any idea why?

Thanks,
Radu
4 Jensen Jan 4th, 2007 at 5:48 am

Dear Radu and All,

I do have same problem with you which Request.ServerVariables(”REMOTE_ADDR”)
is always return me the server IP itself.

May i know that do you found out the solution alreday?

Mind to share what is the solution?

Thanks,
Jensen
5 farid Mar 12th, 2007 at 9:03 pm

i was wounderin gif anybody can tell me. i have chat system i want to place this code in guest table . if i want to block their ip i can do . is there anyone can help me how to store visitiros ip address in data base then i be able to block or give them access to use certain page?
help will be appreciated
6 sam Jul 21st, 2007 at 12:55 pm

thnx alot
7 hamid Jul 21st, 2007 at 8:31 pm

hi
i want source code to find visitor ip address other website
example :
get visitor ip www.discomoose.org
8 Rajeev Kumar Oct 13th, 2007 at 8:16 am

I want to source code in vb.net or c# to find out the IP Address of other website visitor.
Thanks
Rajeev