Best way to filter out IP addresses with hardware..?

[kingneil]

I am looking to filter out IP addresses using hardware external to the computer itself.
 
I have decided that using Windows' system for filtering IPs/hosts is no good, because if someone hacked the computer itself, then they could just alter all of that anyway.
 
So it needs to be some external device, that can't be hacked.
 
The thing is, I am in a place where other people use the same router as me. So, using any built-in IP address filtering on the router is no good.
 
It needs to be some kind of hardware device that is placed between my computer, and the router.
 
It would have the ability to
 
1. Filter out all IP addresses except certain ones
2. Or, just filter out certain IP addresses
 
What is your recommendation for this...?

[SuperDave]

I seriously doubt that you will find such a device. May I ask why you want to filter the IP addresses? Have you checked in the use of Proxies?

[kingneil]

It's simple why I want it.

If someone hacked your computer, then they would still need to upload all your data through your own connection..

And therefore, by filtering the connection with an external firewall hardware device, you can block out all IP addresses except trusted ones, and therefore, they may have your computer hacked, but they simply don't have anywhere to upload it.

[SuperDave]

A good firewall will also do that.