The TL-ER5120 Gigabit load balance broadband router from TP-LINK possesses excellent data processing capabilities & multiple powerful functions including load balance, access control, IM/P2P blocking, Do S defense, bandwidth control, session limit & PPPo E server, which meet the needs of small & medium enterprises, hotels & communities with large volumes of users demanding an efficient & easy-to-manage network with high security. For defense against external threats, TL-ER5120 features automatic protection to detect & block Denial of Service (Do S) attacks such as TCP/UDP/ICMP flooding, TCP scanning, ping of death & 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 & IM/P2P applications with just one click, & restrict staff to use specific services such as FTP, HTTP & SMTP.