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IP Address Question  
User currently offlineFlyvirgin744 From United States of America, joined Jul 1999, 1313 posts, RR: 1
Posted (11 years 1 month 1 week 8 hours ago) and read 942 times:

I have a few security questions about IP addresses.

When you log onto a website, you give out your IP, but what other information can that website get?

As an example, I'm a member of this website, could Johan if he wanted use my IP to figure out what my real name is just based on my IP, perhaps because I'm a member? Can he link my IP with the username FlyVirgin744? or does he only see that my IP has visited this site and nothing else?

Last question, does my own IP change with every ISP that I use? Like if I'm online thru ethernet by Gainesville Regional Utility, I pull out the ethernet cord and sign onto a AOL via a phone line, do they assign me a new IP?

Thanks in advanced,

Matt


Sometimes I go about in pity for myself and all the while a great wind carries me across the sky.
15 replies: All unread, jump to last
 
User currently offlineSebolino From France, joined May 2001, 3681 posts, RR: 4
Reply 1, posted (11 years 1 month 1 week 8 hours ago) and read 937 times:

The IP address cannot give information about you, except from the country where you are.
The IP is given to you by your ISP, and is most probably dynamic (ie change at every connection).

It changes at each ISP change, of course.

Basically, the IP can be seen like:

CountryNumber.IspNumber.CustomerNumber

or more precisely

NetworkAddress.MachineAddress, the NetworkAddress giving information about the location and the ISP.



[Edited 2003-09-18 17:03:33]

User currently offlineBobrayner From United Kingdom, joined Apr 2003, 2227 posts, RR: 6
Reply 2, posted (11 years 1 month 1 week 7 hours ago) and read 919 times:

What he said  Wink/being sarcastic

The IP address is usually assigned to you by your ISP. It's possible to get a fixed one if you really want it, but this costs extra, so you're unlikely to have a fixed IP without asking for it.

It can generally only be traced to your IP. If you did something really naughty, A.net could contact your ISP, but there's no guarantee they'd do anything about it.

It's possible to get other information - for instance, A.net could tell which version of browser you're using. It's still not enough to identify you.

However, if you're logged in, A.net can associate your Flyvirgin744 ID with your IP address and browsing habits.



Cunning linguist
User currently offlineN6376m From , joined Dec 1969, posts, RR:
Reply 3, posted (11 years 1 month 1 week 7 hours ago) and read 908 times:

How is the RIAA then finding the people downloading the music? What are they looking for when the subpoena the ISP?

User currently offlineBobrayner From United Kingdom, joined Apr 2003, 2227 posts, RR: 6
Reply 4, posted (11 years 1 month 1 week 7 hours ago) and read 905 times:

They contact your ISP and say:

"Somebody downloaded / shared copyrighted material (without permission) via one of your IP addresses. They did it at 13:20 on 9/9/03. Tell us who was using that IP address at that time, or we'll sue you lots."

The ISP then hands over account details (if they have them) to the RIAA. The RIAA then sends a subpoena to the account holder.

The ISP might not always have account details - there are lots of services (in most countries) that just let you dial in without an account; they get money from call termination charges. In this case, the ISP would give the RIAA all it knew - your phone number - and then the RIAA would pursue the telco for your details.

And so on.



Cunning linguist
User currently offlineRabenschlag From Germany, joined Oct 2000, 1010 posts, RR: 0
Reply 5, posted (11 years 1 month 1 week 7 hours ago) and read 901 times:

here in germany, ISP are obliged to keep tracks of IP-telephone number (if call by call) or IP-user assignment for half a year.

this basically means:

if someone knows your ISP (say because you visited a specific site at a specific time) he could contact your ISP and he would be able to link this dynamic IP to you personally, because it is logged who was assigned to a given IP at a given time.

of course, your ISP is only allowed to give that information to a prosecutor if there is a suspect that you committed a crime. it should be pretty much the same in the US, and I think this is the way cought the poor souls who fooled the music industry.


cheerio, r.


PS. and there are many other ways to identify you if you are uncatious. e.g., you have windows xp, you enter your real name into your user profile (you must enter something upon installation) - bang - if you visit a site, someone can read your cookies which then contain your real name. and the like.




User currently offlineCaptainstabbin From , joined Dec 1969, posts, RR:
Reply 6, posted (11 years 1 month 1 week 7 hours ago) and read 895 times:

Actually, some of the later versions of Kazaa and Kazaa lite have software than scramble or block your IP address entirely. There's even a program called Earth Station 5 that completely masks your IP address and claims total anonymity. They said they’re launching a war against the entertainment industry.

Anyone know more information about Earth Station 5? Seems kind of weird to use.


User currently offlineCaptainstabbin From , joined Dec 1969, posts, RR:
Reply 7, posted (11 years 1 month 1 week 7 hours ago) and read 889 times:

PS. and there are many other ways to identify you if you are uncatious. e.g., you have windows xp, you enter your real name into your user profile (you must enter something upon installation) - bang - if you visit a site, someone can read your cookies which then contain your real name. and the like.

I'm not the most computer savvy person in the world. Is there a way to change this?


User currently offlineRabenschlag From Germany, joined Oct 2000, 1010 posts, RR: 0
Reply 8, posted (11 years 1 month 1 week 6 hours ago) and read 884 times:

captain:

yes, use multiple users. add a user with a fake id, make sure that this user is an administrator and then use this profile for browsing the web.



User currently offlineBobrayner From United Kingdom, joined Apr 2003, 2227 posts, RR: 6
Reply 9, posted (11 years 1 month 1 week 6 hours ago) and read 881 times:

Actually, some of the later versions of Kazaa and Kazaa lite have software than scramble or block your IP address entirely. There's even a program called Earth Station 5 that completely masks your IP address and claims total anonymity. They said they’re launching a war against the entertainment industry.

A genuine (and unique) IP address is an absolute requirement for any data to reach your PC. There are a dozen different ways to conceal your IP address from the person at the other end - either intentionally, or for innocent technical reasons - but they all require that somebody else in the chain knows your IP address in order to get the data to your PC.

Any anonymising service, regardless of the mechanism, must know your IP address. The RIAA could send them a subpoena. Therefore, if you're really paranoid, choose one based in a country out of the RIAA's reach; or choose one that isn't required by law to retain your details after you disconnect. Good luck.  Smile/happy/getting dizzy

Alternatively, use an internet cafe, or connect through a contract-less mobile phone!



Cunning linguist
User currently offlineN6376m From , joined Dec 1969, posts, RR:
Reply 10, posted (11 years 1 month 1 week 6 hours ago) and read 869 times:

Captain, Bobrayner, Rabenschlag - Great info!

Thanks.

-76M


User currently offlineFlyVirgin744 From United States of America, joined Jul 1999, 1313 posts, RR: 1
Reply 11, posted (11 years 1 month 1 week 5 hours ago) and read 851 times:

Please see if I have this correctly based on the information from above:

Situation: I'm logged in as a first class member, and a few days later, Johan wants to know my IP, he could get it by linking my a.net name with my IP address (because I was logged into his website).



Sometimes I go about in pity for myself and all the while a great wind carries me across the sky.
User currently onlineCPH-R From Denmark, joined May 2001, 6013 posts, RR: 3
Reply 12, posted (11 years 1 month 1 week 4 hours ago) and read 844 times:

Hey, in Denmark, the RIAA have a very worthy opponent - they don't need a warrant to enter your house, and if you refuse, they'll get one - without showing a shred of evidence. Oh - and according to them, a IRC client ranks next to Kazaa, because you can share files with it...  Insane

As for me, I've always had a fixed IP, because I occasionally use my PC for various servers  Smile/happy/getting dizzy


User currently offlineBobrayner From United Kingdom, joined Apr 2003, 2227 posts, RR: 6
Reply 13, posted (11 years 1 month 1 week 1 hour ago) and read 833 times:

Situation: I'm logged in as a first class member, and a few days later, Johan wants to know my IP, he could get it by linking my a.net name with my IP address (because I was logged into his website).

Yes, presuming Johan is keeping logs. However, your IP might change during those few days.



Cunning linguist
User currently offlineFlyVirgin744 From United States of America, joined Jul 1999, 1313 posts, RR: 1
Reply 14, posted (11 years 1 month 6 days 23 hours ago) and read 827 times:

Ok, last thing.

Say that I lived in a large apartment complex with its own T3 and free internet to all rooms in every 4-bedroom apartment. Meaning, I never had to set up an internet account, I just plug into the apartments own ISP which has dynamic IPs.

Do you think there is any way for anything to be traced back to "my" computer. I suppose the only way they could is if they are keeping logs of IPs to every port to every room since there are no accounts. But can they do that? Have a log to just ports? or does it need to be an account?

Or perhaps, once I connect to an apartments internet, can they take information from my computer so that they know exactly who is using that IP that day?


Well now that I'm thinking, last year in the dorms, it was a scenario just like this. You plugged into the wall ethernet and you had internet. However, if you tried going onto kazaa, they took away your internet. How do they know who's doing it? Does the university assign every dorm room a single IP (non-dynamic) so that way they know exactly who tried going onto kazaa? Are their any other ways they can do that?

I guess the main question is, do non-account ISPs take information from the computers in their network (like mine), so they know where each IP is going (again, like my computer) for whatever period of time?



Sometimes I go about in pity for myself and all the while a great wind carries me across the sky.
User currently offlineBobrayner From United Kingdom, joined Apr 2003, 2227 posts, RR: 6
Reply 15, posted (11 years 1 month 6 days 23 hours ago) and read 819 times:

Accounts aren't needed in this context.

When you first try connecting to a fixed network, your computer doesn't have an IP address - it has no practical way of communicating on the network, just a very basic identifier called a MAC address (which is hardwired into your PC). So, it just hollers "somebody give me an IP address!" until it gets an answer.

Your network will have a DHCP server of some description, which is listening for this. It responds to your PC with an offer of an IP address (the address is leased, for a limited time, but it gets renewed automatically if you stay online). The server has a pool of addresses that it can offer to PCs. It might offer one at random, or the network admin might have set up some particular rules for how they are allocated. They might even have told the DHCP server to reserve one address for each PC, in which case you effectively get a fixed IP.

The DHCP server remembers who it leased the IP address to; so your network admin can find out at least your MAC address. They can probably trace other details - port number, and/or hostname. You might be free to change the latter. If they offer anything more than basic network connectivity (IE they have a Windows domain, or whatever), this will will store more information that your network admins might use.

For the purposes of this post: Anything qualified with "can", "might", "probably", &c. is technically possible, but we can only guess as to whether or not it's actually done in that building.



Cunning linguist
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