How did this site get my IP Address

[Inwoner]

The following sites can accuratly show my IP Address:

http://www.blackcode.com/scan

http://stealthtests.lockdowncorp.com/cgi-bin/envtest

How do they do this?

How can we prevent this?

 

[browolf]

when your computer makes a connection to their website, they have to know where to send the pages to, ie your ipaddress.

you can use a proxy. and then the website only sees the proxy. ===============
Security Forums

http://www.security-forums.com

 

[Inwoner]

The problem is that we are using a proxy (Unix OS - Proxy is Squid)

What if you are going thru a service provider. Shouldn't the IP address be those of the Service provider, and the service provider should redirect the packets to you.

 

[browolf]

i think it depends on whether you have a public ip address or not. when you go thru a service provider you are given a public ip.

is the website showing a public or private ip address? ===============
Security Forums

http://www.security-forums.com

 

[Inwoner]

Private IP Address


Have YOU tried the 2 shortcuts I have specified

 

[browolf]

i see what you mean.

the 2nd one gives a hint...
i suggest we go and look up the meaning of stealth proxy ===============
Security Forums

http://www.security-forums.com

 

[Inwoner]

Can you prevent this without replacing your proxy with a new proxy.....


Can you not send out false ip info. Remember that this is a corporate environment......

Are there any *quick* way to block this....

 

[browolf]

it might just mean it isnt configured properly. afaik squid can do pretty much anything.

suggest u get over and ask at

http://www.security-forums.com

there's some ppl there that know about things like that. ===============
Security Forums

http://www.security-forums.com

 

[Grenage]

indeed as with all packets the senders and recipients IP address is sent along with it. If you send someone a letter and you want a reply you have to include your own address don't you?

Anything you connect to is going to know your IP address, why is this a problem ?