A networking device to add an IP device?

5 pts.
Tags:
Network administration
Network security
I want to know if there is a networking device that can be used to receive a device with a IP address (in this case a DVR) and if this device can then have two outputs and each one being able to be seprately addressed. The reason I am asking this is because I am trying to hook in the DVR into an internal network and the Internet. But this device would need to be secure so that I there is not a connection then into the internal network via this device. Does anyone know about how i could go about doing this?

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A firewall is the way to handle the issue you are describing.

If you put the device behind a firewall, on a DMZ, and only allow the necessary protocol(s) from the Internet to the device, and then the same from your internal LAN. Use NAT to translate the Internet IP to the private IP on the DMZ. Put rules in place to only allow the connection to initiate from the trusted LAN to the DMZ and not vice versa, then even if the device is compromised, it can not make connection to your LAN.

That is how most Internet facing systems are configured to be safest. A server is much more likely to be compromised than a specialist DVR, so the vulnerabilities are likely to be lower. If this is a PC running DVR software, make sure it is only running services that are necessary to it’s correct operation, and run a regular (daily at the least) check to make sure it is ‘clean’.

If you take these precautions, then it should be as safe as it can be.

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