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Topic # 55946 11-Jan-2010 08:58
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Just trying to work out, when I am on a website, ie on here, what part of my system tells the website my IP address?

I'm running Vista on its standard settings and using Vodafone mobile broadband.

Is it my PC or the vodem choosing the IP?

I would have thought that in standard form my PC has a dynamic IP address, so in this case, how can a website, ie geekzone, tell its me each time I go to the site?

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  Reply # 288855 11-Jan-2010 09:04
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The website server detects your IP address, and Geekzone uses cookies to know you are you.




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  Reply # 288858 11-Jan-2010 09:08
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Cookies are text files (not malware as some want you to believe) which can be stored on your computer by a web browser, or request.

When a session is initiated the server puts a cookie on your computer and automatically track it to keep the session open. We also store cookies on your computer if you select the option to automatically login - your username and password are stored there so your browser automatically sends this to the server when visiting the site.





 
 
 
 


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  Reply # 288860 11-Jan-2010 09:13
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magu: The website server detects your IP address


And where does this address come from? Is it from my PC independantly of whichever company I use to access the internet?

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  Reply # 288862 11-Jan-2010 09:14
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It will most likely be the IP address your ISP gives you.


EDIT: WOOT! Post #600!




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  Reply # 288868 11-Jan-2010 09:25
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Password in the cookie? I hope geekzone is well tested for XSS vulnerabilities!

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  Reply # 288870 11-Jan-2010 09:29
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Hi,
It is generally not your system per se that is telling a website your IP address. The TCP/IP packet that the website recieves includes your IP address as part of the information contained in it (well actually the external IP address of your modem/router/gateway). The IP address is actually assigned by your broadband provider (generally dynamically, but can be static) - you have little or no control over the extenal IP address. As for how a website knows who you are, generally it is from a "cookie" that is stored on you PC and contains information that the website can use to "track" you.



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  Reply # 288871 11-Jan-2010 09:31
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friedCrumpet: Password in the cookie? I hope geekzone is well tested for XSS vulnerabilities!



Thanks for pointing that out! Went to my Cookie storage and saw my password in plain-text!


Big no-no!


Use a hash at a minimum.




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  Reply # 288872 11-Jan-2010 09:39
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Damn it, it did that thing where I write a reply and click post reply, and instead it goes back to the forum homepage. Wish I knew why it did that. Keep wasting time writing replies and they get deleted. I try to copy text to clipboard before submitting but sometimes, like this time, I forget.

So changing from VF to Telecom broadband or vice versa, means that (any) website visited will have no clue who you are, there will be no other form of ID that gives the game away you are in fact the same person?

In this scenario do the cookies obtained during previous ISP still work, or will they be replaced with new ones and passwords, etc need to be entered again?

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  Reply # 288873 11-Jan-2010 09:40
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They *should* still work. Some websites may not, however, based on the change of IP addresses.




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  Reply # 288874 11-Jan-2010 09:42
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friedCrumpet: Password in the cookie? I hope geekzone is well tested for XSS vulnerabilities!


Do you worry about Trade Me? They store passwords in plain text too...





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  Reply # 288875 11-Jan-2010 09:44
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freitasm:
friedCrumpet: Password in the cookie? I hope geekzone is well tested for XSS vulnerabilities!


Do you worry about Trade Me? They store passwords in plain text too...




Oh OK, then. Since they're doing it as well, it must be fine, right? ;D




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  Reply # 288876 11-Jan-2010 09:44
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freitasm:
friedCrumpet: Password in the cookie? I hope geekzone is well tested for XSS vulnerabilities!


Do you worry about Trade Me? They store passwords in plain text too...



Two wrongs don't make a right.

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  Reply # 288877 11-Jan-2010 09:46
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Don't allow auto login generally solves the problem. It is convenient but.....

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  Reply # 288878 11-Jan-2010 09:46
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magu:
friedCrumpet: Password in the cookie? I hope geekzone is well tested for XSS vulnerabilities!


Thanks for pointing that out! Went to my Cookie storage and saw my password in plain-text!

Big no-no!

Use a hash at a minimum.


And how good would that be? Someone can steal the hash and still use it. The password is hashed and encrypted in our database, so the only way to be stolen is in your own PC or in transit during login.

Sensible password policy: use a different one for each website.





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