The TL-ER5120 Gigabit load balance broadband router from TP-LINK possesses excellent data processing capabilities and multiple powerful functions including load balance, access control, IM/P2P blocking, DoS defense, bandwidth control, session limit and PPPoE server, which meet the needs of small and medium enterprises, hotels and communities with large volumes of users demanding an efficient and easy-to-manage network with high security. For defense against external threats, TL-ER5120 features automatic protection to detect and block Denial of Service (DoS) attacks such as TCP/UDP/ICMP flooding, TCP scanning, ping of death and other related threats. Moreover, this router offers a hardware DMZ port, which allows network administrators to setup public servers without exposing their internal network, to avoid attacks from external threats. For better management of the internal network, TL-ER5120 allows administrators to set rules to block specific web sites and IM/P2P applications with just one click, and restrict staff to use specific services such as FTP, HTTP and SMTP. Device Type: Router Enclosure Type: Desktop, rack-mountable - 1U Data Link Protocol: Ethernet, Fast Ethernet, Gigabit Ethernet Performance: NAT throughput: 350 Mbps Capacity: Concurrent sessions: 120000 Network / Transport Protocol: TCP/IP, PPTP, UDP/IP, L2TP, ICMP/IP, IPSec, PPPoE, ARP, SMTP, FTP, DHCP, DNS, DDNS Routing Protocol: RIP-1, RIP-2, static IP routing Remote Management Protocol: Telnet, HTTP, CLI VoIP Protocols: H.323, SIP Features: Firewall protection, DMZ port, NAT support, ARP support, load balancing, VLAN support, Syslog support, DoS attack prevention, content filtering, port mirroring, MAC address filtering, URL filtering, SNTP support, DDos attack prevention, DHCP server, bandwidth control, DHCP client Compliant Standards: IEEE 802.3, IEEE 802.3u, IEEE 802.3ab, UPnP Power: AC 120/230 V ( 50/60 Hz ) Dimensions (WxDxH): 17.3 in x 8.7 in x 1.7 in System Requirements: UNIX, Apple MacOS, Novell NetWare, Linux, Microsoft Windows 98SE/2000/NT/ME/XP/Vista/7 Device Type: Router Enclosure Type: Desktop, rack-mountable - 1U Connectivity Technology: Wired Data Link Protocol: Ethernet, Fast Ethernet, Gigabit Ethernet Performance: NAT throughput: 350 Mbps Capacity: Concurrent sessions: 120000 Network / Transport Protocol: TCP/IP, PPTP, UDP/IP, L2TP, ICMP/IP, IPSec, PPPoE, ARP, SMTP, FTP, DHCP, DNS, DDNS Routing Protocol: RIP-1, RIP-2, static IP routing Remote Management Protocol: Telnet, HTTP, CLI Features: Firewall protection, DMZ port, NAT support, ARP support, load balancing, VLAN support, Syslog support, DoS attack prevention, content filtering, port mirroring, MAC address filtering, URL filtering, SNTP support, DDos attack prevention, DHCP server, bandwidth control, DHCP client Compliant Standards: IEEE 802.3, IEEE 802.3u, IEEE 802.3ab, UPnP , FCC, RoHS RAM: 128 MB DDR2 SDRAM Flash Memory: 8 MB Built-in Devices: LED panel Status Indicators: Port transmission speed, power, system, WAN, DMZ, link/activity VoIP Protocols: H.323, SIP Interfaces: WAN: 1 x 10Base-T/100Base-TX/1000Base-T - RJ-45 WAN / LAN: 3 x 10Base-T/100Base-TX/1000Base-T - RJ-45 LAN / DMZ: 1 x 10Base-T/100Base-TX/1000Base-T - RJ-45 Management: 1 x RS-232 - RJ-45 Power Device: Internal power supply Voltage Required: AC 120/230 V ( 50/60 Hz ) Cables Included: 1 x console cable Rack Mounting Kit: Included Software Included: Drivers & Utilities OS Required: UNIX, Apple MacOS, Novell NetWare, Linux, Microsoft Windows 98SE/2000/NT/ME/XP/Vista/7 Width: 17.3 in Depth: 8.7 in Height: 1.7 in Min Operating Temperature: 32 °F Max Operating Temperature: 104 °F Humidity Range Operating: 10 - 90% (non-condensing)