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Close Ports

Hey all,

I would like to close a list of ports, to prevent access to my machine (via those ports)..

I'm on a Windows XP SP1.

Thanks in advance,
[r.D]
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DrWarezz
Asked:
DrWarezz
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2 Solutions
 
grbladesCommented:
Hi DrWarezz,
The best way would be to install the free firewall software Zone Alarm.
You can configure the XP firewall but zone alarm is better.
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DrWarezzAuthor Commented:
Hey grblades,
...with ZoneAlarm (which I do have in disk somewhere), you can configure it to block all activity on specific ports?

[r.D]
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improveyourpcCommented:
DrWarezz,

The free version of ZA only lets you block apps, the pro version (pay version) lets you block ports. I will do some research on free firewalls and get back to you regarding port blocking.
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DrWarezzAuthor Commented:
Thanks alot :-)
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stevenlewisCommented:
the way firewalls work is the ports are closed until an internal request triggers them to open
example, you request a web page with your browser
it triggers port 80 to open (sends the request out on this port, but in the packet it tells the web server to respond on a different (dynamic) port, and closes port 80 to external requests
the firewall sees the dynamic port request and listens on that port for a reply
any unsolicted requests to ports are rejected
Now with ZA, it also allows you to block internal request from accessing the internet, by using a program list (all tcp requests use ports), in effect blocking those ports. You have to configure ZA to allow, by default it blocks all ports
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stevenlewisCommented:
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improveyourpcCommented:
DrWarezz,
There is a free program called "Who's There " 

"Which is basically a scaled down port watcher. It allows you to keep track of incoming and outgoing traffic, letting you know which ports are being used, and who is accessing them.
Furthermore, Who's There does all of this with relative ease, allows you to disconnect a connection, 'talk' to the computer that is connecting, and presents the information in laymans terms, making this an excellent program for everyone."


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improveyourpcCommented:
Here's the link:)

http://support.it-mate.co.uk/?mode=Products&p=whosthere. I also agree with stevenlewis that ZA would be sufficient, is there a reason you need to block only specific ports?
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DrWarezzAuthor Commented:
Thanks for the info Steven. :-)

Improveyourpc; do you have a link to where I can get this utility, "Who's there", from? :-)  Thank you!

[r.D]
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DrWarezzAuthor Commented:
Ah -- thanks. :-)
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DrWarezzAuthor Commented:
>"is there a reason you need to block only specific ports?"

Well, actually, I want to block all ports, except for port 80 and 8080
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stevenlewisCommented:
after you get your firewall insthere to test it (free)
https://www.grc.com/x/ne.dll?bh0bkyd2
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stevenlewisCommented:
Just an FYI, I use a hardware firewall (built into my router) and still have ZA installed to block outgoing requests (just because you're paranoid, doesn't mean they aren't out to get you)
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improveyourpcCommented:
StevenLewis and DrWarezz,

I also have a hardware firewall built into my router (using NAT) and I have ZA (free version). The hardware firewall should be sufficient but a little extra added security never hurts! In your case DrWarezz, the free version of ZA should be fine.
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DrWarezzAuthor Commented:
Okay, thanks both, I think that I shall split the points. :-)

[r.D]
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stevenlewisCommented:
DRWarezz, thanks and glad we could help
grblades, see here
http://www.experts-exchange.com/Networking/Q_21204595.html
Steve
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improveyourpcCommented:
Dr. Warezz,

Your welcome! And thank you for splitting the points as I think stevenlewis and I were on the same page on this one! :) Good luck!
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DrWarezzAuthor Commented:
:-)
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