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net defense firewall port scan detected severity high.

I have the system suite 8 professional program which includes a firewall, virus protection, and spyware protection. Here is the situation. On the bottom right of my screen it says that there has been some suspicious activity that has been caught and has been put in a log. I double click on the flashing fire wall icon and it brings me to a securtiy log. It tells me the time security type severity direction protocol local ip remote host and the application involved also the count. Now this port scan has been happening at very random times but usually when it does occur they occur in very close intervals. System suite says that its a portscan of a major severity inbound from a udp protocol. the local ip is and the remote host is The application involved is either SYSTEM or C:\WINDOWS\system32\svchost.exe For the past about 20 times it has involved the system application. The times it has been happening are today at 5:52 5:56 6:01 6:58 6:59 7:01 7:02 7:03 7:04 and 7:05

I can backtrace it and it says the ip address of the remote host and it says that the host name is unknown. When i click on whois it says [whois.arin.net] orgname: internet assigned numbers authority orgid: IANA and the rest is city state and location of i dont know what.

I have a general understanding of computer but im not exactly sure what a port scan is other than that it figures out what ports are open.

My question is this any threat to my computer or do i have nothing to worry about. Thanks.

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Port scanner
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should i worry

In reply to: Port scanner

do you know if this port scan is something i should worry about or not?

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I would not worry as the firewall is doing its job...

In reply to: should i worry

and alerting you. To be 100 % sure, I would run the ShieldsUp test, only to have "peace of mind".

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In reply to: I would not worry as the firewall is doing its job...

what is the point of having ports? what do ports do? is it a bad thing if i have open ports? why do i need to know if i have open ports? Thanks.

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In reply to: ports

Computer port (software)

A software port (usually just called a 'port') is a virtual data connection that can be used by programs to exchange data directly, instead of going through a file or other temporary storage location.

More: http://en.wikipedia.org/wiki/Computer_port_(software)

Computer Ports: What You Should Know to Defend Yourself


port number


Are you safe from scanning?


Do I Really Need a Firewall?

Absolutely. A system without an active firewall is vulnerable to infection by a variety of malicious programs, sometimes within minutes of connecting to the Internet. Even if you're typically very careful in your computing practices, your system can still be infected by programs that scan random Internet addresses and attempt to "slip in the back door" through open ports on your computer. A firewall is necessary to keep these random intruders from hijacking or damaging your system.


An open port is a port that is "listening".
A closed port is a port that is blocked by the firewall
Stealth port is NOT visible in the internet

Maybe you did NOT want to know 'that much" ....... nothing happens IF you do the ShieldsUp test Wink

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