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Posted by Leythos on November 20, 2005, 8:31 pm
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regs@excedere.com says...
> Group:
>
> I am a newbie when it comes to this - I have a static IP DSL line,
> running Trend Micro's firewall and a wireless Linksys router (for
> roaming about my office/house with laptops.) On the router setup page
> there is a list of incoming traffic (a mile long) that lists IP
> addresses from around the world. The question is: how do I stop this?
> >From what I know, this appears to be access to the router and not my
> computer (I am assuming the firewall is protecting my computer--but you
> know what happens when you ass/u/me!)
>
> Anyway if someone could point me to some help on the following:
> a) how do I block the incoming traffic? (with the caveat that I
> sometimes want to connect to my office computer using tools like
> GoToMyPC...)
> b) how can I limit access (to my wireless network using the wireless
> connection) to just the computers on my home/office PC?
>
> Thanks for the help--I'm feeling very intruded upon...
Most NAT routers block inbound connections that your network has not
requested. So, if I were to try and connect to your computer from here,
the NAT router would stop me from getting past it since your computer
did not request my connection.
NAT Routers make great simple appliances to keep the unsolicited
internet users out of your network (even with a single PC you have a
network). These devices should not be confused with real firewalls, they
don't offer anywhere near the protection if any at all.
As for NAT Routers and outbound, well, lets just say the barn-door is
always open. With the exception of a few NAT routers, they all allow
anything out of your network. This means that if you were to have your
machine compromised, the malware on it could phone home and get
instructions or more malware and self install it on your computer.
As for blocking the connections, you can't, as long as you have a public
connection there will be attempts to connect - most of it is just
background chatter and can be ignored for the most part.
In most cases, unless you really understand security, your personal
firewall running on your computer won't do much to protect you, as you
control it, any mistake you make will possibly compromise your computer.
I hope you've secured your Wireless access - if not, most are in a
default setup, which means that anyone near enough can access your
network. Make sure that you read this:
http://www.microsoft.com/windowsxp/using/networking/learnmore/bowman_
05february10.mspx
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