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How to block wired computers from accessing the internet?? (alien.top)

submitted 11 months ago by [email protected] to c/[email protected]

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I have a problem that I hope is easy for you guys to help me with.

At work we have 4 computers that currently are not connected to the internet, only to a local network for our point of sale system. Our debit machines are connected to the PoS computers by RJ45 to serial cables and the debit terminals are connected through an unmanaged switch to our modem to access the internet. Our debit processing company is forcing us to change terminals and these new ones take ethernet in and send it to the computers to communicate through TCP/IP instead of serial. That will force the PoS computers to have access to the internet. We would rather they didn't have access to the net. I called our ISP today to see if MAC address filtering was a possibility on our modem and it is not. So I am looking for a simple solution to keep the NIC of each of the computers functional but prevent them from accessing the internet.

Would simply upgrading the switch they are on to a managed one or a router, be all I need to do so I can set up a MAC filter? If so any suggestions on one would be appreciated. Is it even possible for wired connections? If not any help would be greatly appreciated. Thanks in advance!

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[–] [email protected] 1 points 11 months ago

Throw in a Dell Sonic Wall, and make the POS company happy. They're the industry standard for a reason, where I wouldn't use a consumer based product for this instance, due to the security issues with many of them. They want a SECURE firewall in front of those terminals, and it keeps you in compliance with the latest rules.

Reading what you have, your current system is not in compliance, with the debit machines accessing the internet with NO FIREWALL. The fines are not cheap, if something happens.