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UDP activity on my firewall

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UDP activity on my firewall

I have noticed that there regular activity on my internet connection every 6 seconds or so.

When I looked at my firewall, and locked internet access, I received warnings of blocked UDP attempts which cycled through all the UDP ports. This activity appears on both of my computers.

Typically I see:

packet sent from (192.168.0.1 UDP port XXXX to 255.255.255.255 UDP port 61112 was blocked.

Is this something I should be concerned about?
6 REPLIES
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UDP activity on my firewall

Personally I'd be concerned, and run a scan with your Antivirus software.

Additionally, run an Anti-spyware scan with something like Spybot Search & Destroy (freeware)

http://security.kolla.de

Ad-Aware

http://www.lavasoft.com

Spyware Blaster

http://www.javacoolsoftware.com
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UDP activity on my firewall

Mysteriously the activity stopped the following day.

I think somebody was doing a random port scan of some sort. While it was going on I closed all my forwarded ports just in case.

I used Spybot to remove anything suspicious.

Thanks for your response.
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UDP activity on my firewall

No problem
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UDP activity on my firewall

udp isnt so worring tcip is like a phone were there is a conversation on both sides udp is like someone throwing a letter to you and not bothering to see if you reply.

In this sense there is no actual conection to your pc as there is with tcip. You could get this if you run some p2p stuff or mirc as something is trying to find a port to talk on.

You did the right thing by shutting it down for a while its worth running a port check if its alll ok

visit
http://www.janwright.co.uk/drivec.htm

there are several sites listed which will check your ports and report any problems
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UDP activity on my firewall

Watch out for scaremongering amongst the so called 'security experts' though.
<stands back for fear of flames>

Check out http://www.roypenfold.co.uk/admin.php?op=FaqCatGo&id_cat=3

for detaills of the drive 'c' hoax
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UDP activity on my firewall

The problem with the scaremongers is they obscure the real problem with a barage of information.

Most of what they say it true, but any sane person would weigh up if they need to perform some of the advice they use, or use more generic methods.

Generic methods can be less secure on specific points, but provide overall stability.

Many people like to say "don't rely on NAT as a sole security measure". That is true. A software firewall will give you readily available statistics companred to a NAT rotuer.

However, NAT is pretty damned secure, and only specific pass-through functions of your rotuer may make that a false statment,