strange adsl problem

M

Mineer

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Hi

recently I have started to notice that after browsing for a few minutes my speed drops considerably. I am thinking virus cos I dual boot to linux and the speed is constant only problem I have is I have bit defender 2010 and that seems to be working fine also nothing suspicious in the firewall what programs do u guys recommend to do more in depth investigation

ps my bit defender is paid for so dont wanna get rid of it but starting to believe it failing me any advise here also
thanks
 
Make sure windows is not downloading updates in the background if this is only happening for the last day.

netstat -a
will show you your open connections.
adding a -b will also show which program is responsible for the connection.
hope this helps

but start with netstat -b this will probs give u what u want right off the bat <- must be admin to run the -b option

http://demosten.com/showtraf/ if you prefer a gui to display the live traffic
 
Last edited:
Download a bandwidth monitor tool, like DU Meter, so you can see the total download and upload traffic on your PC. Could be a virus, or something else in the background (Windows Updates, Java Updates, Adobe Updates, etc, etc) downloading stuff. The bandwidth monitor will only help you to confirm/deny the fact that something is downloading without your permission/knowledge.

Also, I believe that is a tool that will show you the internet traffic of each process running on your PC. It monitors the TCP/IP traffic or somethin like that. Can't remember the name, or URL, but I'm sure some other helpful myBB forumite will post it here shortly..
 
Here's a link to an oldish thread about Bandwidth monitoring that I've update a moment ago: http://mybroadband.co.za/vb/showthread.php?t=202445

BitDefender is definitely one of the decent antivirus & firewall software on the market, so I would still continue to use it if I were you.

I would recommend that you run Spybot: Search & Destroy and Malwarebytes' Antimalware to ensure that your PC isn't infected with spyware/malware.

I've once had a similar case where someone brought in his PC where his Internet went extremely slow after a couple of minutes. It went from 400kB/s to a few bytes/s, even though his HSDPA dongle's stats page reported no other traffic. I've ran multiple virus & spyware scans (McAfee, Avira, Spybot, Malwarebytes, and a few more) and none of them detected anything. I'm no fan of AVG any more, but I installed it and ran it in any case and it actually detected and removed the culprit! :D
 
Personally, since Windows Vista came out there is no need to buy another company's firewall software.

Why?
Take a look at just how advanced the Vista and Win7 built-in firewalls are. They are even better than the Linux iptables for Desktop users. I like how you can block/allow based on source ip and port, as well as Application level without causing too many popups.

I would highly suggest using the windows firewall if you are on vista/7, if you are still on XP Bitdefender is a good option.

You do however have to figure out what is making connections, could be something that is constantly updating itself or just a trojan/bot/virus sending out lots of spam on your connection.
 
Tinuva, I can't remember Windows Vista's firewall blocking outgoing connections at all. I don't have Vista, so I can't test it either.

I have seen that Windows 7's firewall is quite advanced though, and it should be able to block outgoing connections.

Linux iptables have their advantages too, like setting up chain rules, which you can't do in the Windows Firewalls.
 
Pada said:
Tinuva, I can't remember Windows Vista's firewall blocking outgoing connections at all. I don't have Vista, so I can't test it either.

I have seen that Windows 7's firewall is quite advanced though, and it should be able to block outgoing connections.

Linux iptables have their advantages too, like setting up chain rules, which you can't do in the Windows Firewalls.
Click to expand...

Win7 and Vista has the exact same firewall. And yes iptables has it's advantages, but out of the point of view of a normal desktop user the Win7/Vista firewall is what you want.
 
thanks for the advise guys last night I found the little bugger and squished him thanks for the netstat -b advise lol I had to do some research on google to understand what I was reading but ya got him also for those who is interested found this program called "hijack this" it help me squash the bug apparently it loads when I start my browser

thanks all :)
 
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