Block other computers from accessing my computer
On your router, configure it in order that it offers Computer C a set IP deal with. Some routers call this "IP Reservations" or comparable. Then configure the firewall on computer A to reject all connections from Computer C's address. You can be able to accomplish this for your router, depending at the skills of its firmware, but you can surely accomplish it by using configuring firewall settings on Computer A.
You could also make sure Computer A has sturdy passwords on all accounts and isn't always walking vulnerable software program or software program permitting all and sundry to get entry to files on the machine.
If computer C is in all likelihood to alternate its MAC deal with in an hostile way, then one option is to have a separate stressed out and wi-fi router, and configure its DHCP server at hand out a distinctive range of addresses from your stressed router. You can then tell Computer A's firewall to reject any connection from any IP inside the wireless variety.
You could also make sure Computer A has sturdy passwords on all accounts and isn't always walking vulnerable software program or software program permitting all and sundry to get entry to files on the machine.
If computer C is in all likelihood to alternate its MAC deal with in an hostile way, then one option is to have a separate stressed out and wi-fi router, and configure its DHCP server at hand out a distinctive range of addresses from your stressed router. You can then tell Computer A's firewall to reject any connection from any IP inside the wireless variety.
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