Are there any internet filters out there in a hardware format?”
You are looking for a proxy server, a class of network appliance. Most enterprise environments have them. The one used by my company is made by Blue Coat. Here is their page on Web filtering: http://www.bluecoat.com/solutions/enterprise/controlsecurity/webcontentfiltering A proxy server intercepts all Internet traffic that is either inbound or outbound from a local area network. It terminates all packets that pass through it and can decide whether to stop them or re-originate them, based on content, URL, protocol, where it originates – the appliance gives you a lot of control over what is allowed. However, a device like this is pretty expensive. Most home users would do better using a subscription service like Websense. If you are trying to control what your children can and cannot see, I would reco