NTL IP's - several people on same ones?

[zoombini]

I found out today that several people at different locations can all have the same IP.

I.E. someone has posted on another forum & they have done this under exactly the same IP as me (& some others) on the same day!.

How come?

[Chris W]

The people do not have the same ip (the way ip works makes this impossible) but the forum will be picking up the ip of the proxy server, rather then their real ip address.

MB

[zoombini]

ah heck...okidoki.
Any way around that with an vb forum?

[Chris W]

Yep.... the team on this forum see your real ip instead of proxy...

it is a hack installed by the admins i believe

[Paul M]

Originally Posted by zoombini

ah heck...okidoki.
Any way around that with an vb forum?

If you mean a vBulletin forum then yes, you install the appropiate hack (like the one I partially wrote, and we use )

[generationgav]

How does this hack work?
The one way I know of it being possible is via Javascript checking, but that is unbelievably easy to fake. So what method do you use? or is that a trade secret?

[Paul M]

trade secret

[Horace]

generationgav :

http://www.vbulletin.org/forum/showt...t=69295&page=1

You'll need to register to download the fiile.

[Tricky]

Some PHP Code I knocked up:

PHP Code:

    if ($HTTP_VIA)
        {
            *****proxy = "Y";
            if (strpos($HTTP_X_FORWARDED_FOR,',')) 
            { 
                $HTTP_X_FORWARDED_FOR = substr($HTTP_X_FORWARDED_FOR,0,strpos($HTTP_X_FORWARDED_FOR,',') ); 
            }
                *****addy = $HTTP_X_FORWARDED_FOR;
                if(*****addy == "")
                    *****addy = getenv("REMOTE_ADDR");                    
            }
        else
        {
            *****proxy = "N";
            *****addy = getenv("REMOTE_ADDR");
        }
} 


Would result in two variables being set:
*****proxy would be either Y or N to show if you've come via a PROXY (like NTL)
and
*****addy would be your REAL IP Address

EDIT: Don't you just love the filters!!! - the ***** was a $ for the variable followed by hit therefore looking like a foul smelling substance!? instead of ***** I.e. $wordproxy and $wordaddy

[David25]

If someone was browsing through a properly anonymous proxy can it be detected? I assume not, but one never knows.

[nffc]

Is there a phpBB hack for this?

[zoombini]

Thanks for the info folks - passed it on.

[poolking]

Originally Posted by Horace

generationgav :

http://www.vbulletin.org/forum/showt...t=69295&page=1

You'll need to register to download the fiile.

And also have a valid vbulletin licence.