How Important is an IP Address?
There's an interesting post on VitalSecurity.org by paperghost. He's talking about a feature in Gmail that allows you to see all IP Addresses logged into your Gmail account and even sign out all other users. He has two interesting thoughts in the article. That there's now a privacy concern if an attacker is in your account and that password protecting this information may be a valid counter measure. The second thought is disregarded in the same sentence on the basis that the attacker has the password, however if you're the victim of sidejacking, perhaps this is the perfect defense.
I want to discuss the other point... that it's time to be paranoid, throw up the proxies and worry that your IP is being stored. I wonder if your IP Address is even an important piece of information these days? I'd prefer if not everyone knew my IP but at the same time, does it matter?
We mask packet captures because quite often those contain private IPs that could contain information on infrastructure and available resources. After all a host named dc.example.com or exchange.example.com probably tells you it's exact function. Should we worry as much about public facing IPs?
Let's picture the attacker and the victim. The victim is likely to log in from one of four places... Work, Home, Mobile, Free Wifi. Let's take a look at each of these.
Work - The attacker has access to your email and quite possibly targeted you. This means they're likely to know where you work. A simple search on a site like ARIN Whois will tell me all the public facing IPs... Sure this may speed things up... but I'm an attacker, I've got more than enough time.
Home - How often is your home IP targeted by an individual these days? Sure it may be scanned by bots and sure you may be targeted by malware, but an individual attacker? Unless they really want something specific from you, your home IP doesn't matter to them. Even if they do want it, having it shouldn't help them, a simple home router for $39.95 from Best Buy is going to keep those open ports from facing the internet.
Mobile - Since this is probably a NAT'ed IP Address what are they going to get... your cell provider?
Free Wifi - The attacker may now know where you are located if you are out and about, but twitter, Facebook and everything else under the sun already tells them that information.
So is an IP Address important private information these days? Maybe if you're breaking the law... but otherwise I don't think it matters.
I fully support the idea of adding password validation to the details section (perhaps even a different password than your login) but I definitely wouldn't want the feature going away... I love it.
The bigger issue will probably come when you can assign names to sessions ( and have it link that IP to the session for future ease of use). If your spouse happens to log in and sees another session open and it doesn't have 'Office' next to it like your previous ones, especially after you said you were going to be working late... well then you might have problems.





