?
Solved

Getting a client's IP address

Posted on 1999-01-14
2
Medium Priority
?
159 Views
Last Modified: 2013-12-25
I am interested in identifying a client which activates a cgi/servlet on my server. I would like to use his IP address as the identifier. How can I read this identifier in my cgi/servlet? I know the cgi variables REMOTE_HOST and REMOTE_ADDR give me some information about the client, but it is not necessarily his exact IP. I think it's only his network IP. Is there something else?
0
Comment
Question by:ariefishler
2 Comments
 
LVL 11

Accepted Solution

by:
mouatts earned 200 total points
ID: 1830589
The IP address returned is the full, and only IP address, that you can get to. It is this address that the server will respond to when it sends data back to the client.

The problem is that if the client is behind a firewall or is using a caching proxy server then the IP address that you will see is the IP address of the proxy server. The real IP address is held by the proxy so that when you respond to it it will respond to the client.

If the client is not using a proxy the the IP address will be the IP address of the actual machine.

I am afraid there is no way around this as has been discussed and mentioned several times before in other questions.

As also stated the only ways in which a user can reasonably be recognised are.

1) To store a cookie which you can re-read on subsequent accesses.

2) Allow registered users through a password control mechanism and then track the user through the course of you site.

3) Implement the site via SSL and require a certificate. This is generally not an option at the present time as the use and understanding of certificates is so poor generally that you would  get no users to you site.

HTH
    Steve
0
 

Author Comment

by:ariefishler
ID: 1830590
Thanks....was quite quick !!!!
0

Featured Post

Get your problem seen by more experts

Be seen. Boost your question’s priority for more expert views and faster solutions

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Making a simple AJAX shopping cart Couple years ago I made my first shopping cart, I used iframe and JavaScript, it was very good at that time, there were no sessions or AJAX, I used cookies on clients machine. Today we have more advanced techno…
A quick Powershell script I wrote to find old program installations and check versions of a specific file across the network.
The viewer will learn how to create and use a small PHP class to apply a watermark to an image. This video shows the viewer the setup for the PHP watermark as well as important coding language. Continue to Part 2 to learn the core code used in creat…
In a recent question (https://www.experts-exchange.com/questions/29004105/Run-AutoHotkey-script-directly-from-Notepad.html) here at Experts Exchange, a member asked how to run an AutoHotkey script (.AHK) directly from Notepad++ (aka NPP). This video…
Suggested Courses

578 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question