Compare Filtering Technologies |
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This table compares software and hardware methods of filtering Internet content currently applied end users, ISPs and at Carrier level. Technology | Effect on Network Performance | Typical Application | Support Requirements | Security | Ease of Implementation | Number of URLs blocked | Per User Cost | Effectiveness | Per user profiles | DNS Poisoning | None | ISPs, Carriers | Low | Med | Easy | Thousands | Low | Low (minor overblocking risk) | no | IP address blocking | Low | ISPs | Medium | High | Medium | Thousands | Low | Low (major overblocking risk) | no | PC-Based software | Medium | Homes | High | Low | Difficult
| Millions | High | Medium | yes | Proxy-based web Filtering | Low-High | Corporate Networks | Medium | Very High | Medium | Millions | High | Very High | yes | Packet Inspection Appliance as Layer 2 Bridge | Low | ISP', Carriers | Medium | Very High | Medium | Millions | Medium
| Very High | yes | | Packet Inspection Appliance with mirrored/tapped traffic | None | ISP', Carriers | Medium | Very High | Easy | Millions | Medium
| High | yes | Hybrid BGP and Packet Inspection Filter | None | ISPs, Carriers, Gateways, Hosted Systems | Very low | High | Very Easy | Thousands | Very low | High | No
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