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Windows 7: Multiple DDoS attacks prevention?

05 Apr 2012   #11
kegobeer

Windows 7 Ultimate x64 SP1
 
 

If you have several computers behind the router, and they all trigger an attack as soon as they go online, then I would wager those computers are infected - they are "phoning home", which triggers the DDOS. I'm with quickdraw on this one - I'd do a restore or a complete Windows installation.


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05 Apr 2012   #12
quickdraw2011

windows 7 home premium 64 bit
 
 

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06 Apr 2012   #13
Lorlan

Windows 7 Home Premium x64
 
 

Thanks for all the help you've both given me! I was considering doing a restore but wanted to leave it as a last option, I don't know if this will help anyone else but I phoned up my ISP once again, they said that in the past few weeks they've received several reports of people receiving DoS attacks. Also Virgin Media(UK), offer nothing in the way of personal support for this issue apart from having a division to send a log to if you're being attacked by someone from their IP pool or so they tell me and that Virgin will send any information they have to the police or similar services. So don't waste your time phoning up asking for help, you'll get none or very little if you're a domestic user except advice to upgrade your security, make sure any existing security is working and running scans. If you do wish to report a log and you're being attacked by someone from their IP pool, you can report it here, just a small note I reported a log on the 15th of February and I doubt I'll receive a reply. This is from a confirmation e-mail that I received after I sent in my report "Please note that Virginmedia will not discuss the outcome of our investigation into this matter, nor divulge details of the account concerned. Unless we require further information from you, you will not receive any further communication from us in regards to the above reference number." If they contact you at all, expect it to be a long time after you send your report: NetReport - Virgin Media

I'll try a system restore, I'll let you know if this fixes the problem.
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06 Apr 2012   #14
fseal

Windows 7 x64 Ultimate
 
 

Well, also be aware that everyone everywhere is basically constantly "attacked" random DDOS, probes etc. nearly constantly. That's how they work. They just continuously probe until a machine becomes vulnerable.

Really the only soution is to keep your router firmware up to date as well as your firewall and computers. The wolves are always at the door...
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06 Apr 2012   #15
Lorlan

Windows 7 Home Premium x64
 
 

Sadly I got told the same by a friend too. I'm unsure where to update my router's firmware or if it's done automatically as it was supplied by my ISP and runs their firmware. Looking at the router's status page the current firmware version is: 3.4.4.1.0.1. While looking at netgear's firmware version for my router would be 1.1.00.41. So I'm unsure whether I should be using the current firmware or Netgear's.
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06 Apr 2012   #16
F5ing

Windows 7 Ultimate x64
 
 

You may have heard that if you connect a clean, but unsecured machine directly to the internet, it will likely be compromised within a few minutes. You are always under attack.

But you mention that your connection speeds drop, and this shouldn't happen under normal circumstances. Do you have only one realtime virus scanner running? When one machine's connection speed drops, does it also drop for the other two?
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06 Apr 2012   #17
Lorlan

Windows 7 Home Premium x64
 
 

Never heard that before, but it wouldn't surprise me too much. As far as I know it's like this for the other machines too. Apart from Avast, MSE and malwarebytes these are the only things which have realtime scanning enabled, look at my first post to see what else I use. Also added Spybot search and destroy to my machine and one of the other ones.
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07 Apr 2012   #18
quickdraw2011

windows 7 home premium 64 bit
 
 

Internet Security (Anti-virus & Firewall)
I use Norton, it's does everthing automatically. (Besides, my ISP provides it free).
Use Malwarebytes
Other than CCleaner, I don't recommend using registry cleaners, they can cause more harm than good.
Keep Microsoft Updates current.
Social networks, Torrent downloads, Opening strange email, and Girly sites , will be were you get infected the most.
Remove programs you do not use from add/remove programs. Google, if not sure.
Spybot: Search & destroy, always disable the Tea timer which runs in real time. Causes a lot of issues. (You only need Malwarebytes).
The more Malware scanner software you download, the greater the changes are of getting false positive readings from the scan results.
Clean your browser History often.
Google msconfig startup entries, and disable the ones you don't need.
Defragment often.
I perform system recovery, twice per year on all my computers. Keeps them running tops! I keep important stuff backed up on external drives.
The computer you have is not every powerful, so you need to keep software to a minimum, and keep it well maintenanced.

That's my two cents worth.

Quickdraw
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07 Apr 2012   #19
Lorlan

Windows 7 Home Premium x64
 
 

I used to use Norton, but it hogged a lot of my resources and sadly I had to pay for it. I already use CCleaner and keep MS updates current. As for social networks, torrenting, strange e-mails and girly sites; I try to keep those at a low. Regularly check to see if I have unnecessary programs anyway. Didn't know about the tea timer, and false positive issue though, so thanks for that. Clean my browsing history fairly often. I'll give check the startup entries too. Defragment about once every 2 weeks. Might be an idea to do a system recovery, and it's always a good idea to back up your important files. I try my best to keep my machines maintained ok, but thanks again for the advice!
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07 Apr 2012   #20
quickdraw2011

windows 7 home premium 64 bit
 
 

Post a screen shot of processes in task manager. I'd like to see what is running there.

Screenshots and Files - Upload and Post in Seven Forums

Here's how mine looks in selective startup mode. But, post your's in normal mode.

Multiple DDoS attacks prevention?-capture.png


Quickdraw


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 Multiple DDoS attacks prevention?




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