Detecting if IP is a proxy

[oleshka]

I know how to whois an IP and various other tools to look into IP's but how do you tell if an IP is that of a proxy?

Is there anyway at all to find out?

[Charter]

There are a number of possibilities not only to detect a visitor using several anonymous proxy servers, but also to detect his real IP even if he is using an anonymous proxy server.

You cannot detect IP with the help of cookies. However, when you first visit a web site, the IP (i.e. your proxy server s IP) is detected by the web server and then stored in the cookies.

ActiveX and plug-ins are various add-ons and modules of your browser. These modules are in fact real proper programs run on the client s machine and therefore they have wider capacities than Java and Javascript. They can easily detect your browser settings and track down your real IP address.

[balachis]

How do yo detect an IP of a spammer?
Can you do that?
Let's say that I'm a regular user that don't have any website and I got a so many spam messages from someone I don't even know in my inbox, how can I detect where's he ?

[hostaddonltd]

Yes, there are ways to determine if an IP address is associated with a proxy server. While it's not always possible to definitively know if an IP address is being used as a proxy, there are several methods you can use to make an educated guess:

1. Check Proxy Headers: Take a look at the HTTP headers of the network traffic to see if any proxy-specific headers are present. Common headers include "X-Forwarded-For" and "Via."

2. Reverse DNS Lookup: Perform a reverse DNS lookup on the IP address to see if it resolves to a known proxy server or hosting provider.

3. Blacklist Check: Verify if the IP address is listed on any proxy or blacklist databases. These databases often track known proxy servers and IP addresses associated with suspicious activities.

4. Geolocation: Use geolocation services to determine the physical location of the IP address. If the IP originates from a data center or a hosting provider, it may indicate proxy usage.

5. Behavioral Analysis: Analyze the network traffic patterns associated with the IP address. Unusually high traffic, frequent connections, or patterns consistent with proxy usage can suggest that the IP is being used as a proxy.

Remember, these methods can provide insights, but they're not foolproof. Determining if an IP address is a proxy requires a combination of technical analysis and contextual understanding.

One of my friends uses this php-script which doesnt allow users with proxy to get on the site - if thats what you need mate pm me and ill get you the name or the link

[saravanan28]

In the Windows search bar, type "Internet Options".
Select Internet Options from the results list.
Click to open the Connections tab.
Click the LAN settings button.
Notice in the Proxy Server section: