Wanting to Block IP Addresses

I currently do not wish to file a complaint with the ISP abuse department. 
At this time I simply wish to block 2 IP addresses so as to be able to stop P2P communications between my network and theirs. I have tried to do this with my current modem firmware but it does not have the functionality, so I went a bought 2 different routers to try to get firmware that has the ability to block IPv4 addresses, and neither of them had the functionality, only 1 was able to block IPv6 addresses, not IPv4 addresses. So I am now turning to my ISP to try to block 2 IPv4 addresses from communicating with me over the internet.

Looks like 2 IP given out by KPN, a college in the Netherlands. A ISP isn't going to block traffic from 2 international IP just from one request. That would be like calling Cox and asking them to disable 2 phone numbers from ever calling a Cox number. It has to be done specifically for you, which means your router. What router do you have? I have a hard time believing it can block IPv6 traffic and no IPv4. I can help configure though. Whats the model number? You might be able to block it at the OS's firewall too.

Block the IP addresses using your Hosts file. Do a search for "block an ip address using a hosts file" and do that and your problem is solved.

I was thinking about the host files, and its a good idea, but wouldn't that only block traffic on that machine? That was the same conclusion I came to about firewall and antivirus possibilities. It won't do much for inbound traffic to his router's public IP. If anything, try changing the MAC address of your router so you get a new IP, then if its a inbound issue, just don't use their sites anymore and problem will go away.

Okay, just do a search for "router level IP blocking" if you need to block it on all machines. There's a lot of info out there.

I currently have a Linksys EA6400 and it uses the new "smart wifi" firmware.

This is a image of the security page offered by the firmware, I have tried to do some IPv6 addresses that have been converted from IPv4 addresses but it does not work. http://puu.sh/biYQh/ebb3c8cb32.png

I am wanting to block the 2 IP addresses on all computers on the network rather than just 1 machine. I have searched through a bunch of results that came up from "blocking IP on router level" but most of what I have found is how to block websites, not IP addresses.

MasterMarciniak said:
a Linksys EA6400 and it uses the new "smart wifi" firmware.

Ick, what horrible firmware. Who builds a firewall with a IPv6 blacklist when IPv6 isn't even standard and then not include a IPv4 firewall. Stupidity. No wonder Linksys got bought out.

Rant aside, looks like you can't do what you want with that router and that firmware. Doesnt look to be compatible with dd-wrt either. 

Is there a reason you need them blocked? Why won't a IP change work? Its either that or buy a new router.

I don't know that firmware, but if possible add the ip addresses in the firewall section and set it to drop packets (not reject) from those ip addresses. If you can't do that, I recommend you simply take a few minutes and block them in the hosts file on each computer connecting to the router, it won't take that long to just lock down the computers from those ip's if the firmware doesn't give you a way to do it.