Summary: Intrusion attempts are actually common - you'd be surprised at how much internet traffic is due to infected machines trying to infect other machines.
The security on my computer says network traffic from (some IP address) matches the signature of a known attack. does this mean someone tried to hack into my computer and if so, how do i find out who it was?
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Yes it does, and no it doesn't.
And finding out who it was it not only difficult, but probably pointless as well.
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While it's certainly possible that someone is attempting to break in to your computer, it's really not very likely. By that I mean that unless you present some kind of lucrative target for some reason, there's not likely to be someone out there trying to get at you specifically.
What's more likely is that:
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Most viruses work by trying to infect other machines once they've infected yours. They do that through a number of different ways, but the important thing here is that they're simply machines, and they're dumb. They're just looking to infect anyone that they can reach.
If you were to actually look at the traffic on the internet you'd see that a great portion of it is exactly that: infected machines randomly or methodically attempting to reach out and infect other machines.
This is why you need a firewall. Even a NAT router will do. Firewalls protect you from these random and unauthorized attempts.
The great news here, is that it sounds like you already have that in place. It's likely your firewall that's reporting the intrusion attempt.
You could try to track down the infected machine trying to infect you, I suppose. The problem is that with only the IP address you can only get as far as the ISP that provides that machine's internet connection. That's not going to do much for you.
In your shoes, I'd ignore it, knowing that my firewall was protecting me, and get on with my life.
Related:
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Ask Leo! - What's a firewall, and how do I set one up?
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Ask Leo! - Can I get someone's name and address from their IP address?
Article C3085 - July 14, 2007
If you need a great firewall, there is a free one called zone alarm. Go to www.zonealarm.com and download the free one. You can also have a free trial for 15 days of a virus protector but I wouldn't take it. The best virus protector in my opinion is Avg. This is free also and is available at
Posted by: Trevor at July 20, 2007 7:58 PMhttp://rd.bcentral.com/?ID=4765304&s=149596295
or you can go to www.grisoft.com and try and find it that way.
OK. I am getting this intrusion attempt. My information says that the attacking computer is my own (I would think that this was the computer that is trying to attack mycomputer). And then i gives another desination attempt. It happens when I'm trying to access the internet. So I'm assuming that my computer is trying to access a site that is not trusted by my firewall. However, I don't recognize the website as one that I've ever attempted to purposely access. So now, it comes up as my homepage and when I try to set my homepage back to the default, it will set it for one try and then it reverts back to the intrusion site. How can I change this? I would like to get into the internet without goin through this routine every time. Thank you
Posted by: Raquel at December 12, 2008 2:54 PM