Along with the built-in NAT firewall feature the router also provides advanced hacker pattern-filtering protection. It can automatically detect and block Denial of Service (DoS) attacks. In addition to the NAT technology the BiPAC 5200/5200S supports Packet Filtering for high-level security control. The Web-based User Interface makes the BiPAC 5200(S) extremely easy for users to install and manage the network. With DHCP client and server built-in system administrators can easily attach this security router into existing network and manage the IP assignment without re-configuring other stations. Furthermore future firmware upgrade can be done via the friendly Web-based User Interface.Billion's BiPAC 520 is an easy-to-use yet economical pack of ADSL2+ Modem/Router perfectly designed for home and SOHO users to enjoy rich firewall security user-friendly Web interface and faster speed when using ADSL Internet connection. The router lets you share high-speed ADSL Internet connection even faster with advanced ADSL2+ capability of downstream rate up to 24Mbps. The powerful SOHO Firewall feature protects against hackers' attacks when you surf the Internet. VPN pass-through is also built-in for secure access. In addition the web-based Graphic User Interface allows you to install and manage your network easily. The BiPAC 5200 makes fast net surfing affordable and easy - Going online is just 'plug and play'. The router complies with ADSL worldwide standards. It supports downstream rate up to 12/24 Mbps with ADSL2/2+ 8Mbps with ADSL and upstream rate up to 1 Mbps. With this technology users enjoy not only highspeed ADSL services but also broadband multimedia applications such as interactive gaming video streaming and real-time audio much easier and faster than ever. Particularly Annex M standard combined in the model of BiPAC 5200(S)A supports the latest ADSL2/2+ for higher upload speeds by doubling the upstream data rate.