(Is your host frequently dropped, or IP conflict often occurs? Is your server hanging/horsing, or is it often visited by hackers? Are you worried about the monitoring of communication data (eg MSN, QQ, EMAIL)? Are your network speed and network usage restricted by network management software (such as Jusheng network management, P/2P terminator)? Are you suffering from all kinds of ARP attack software (such as network enforcer, network scissors, LAN terminator)? Is the LAN you manage always bewildered by ARP viruses? The source of the above problems is ARP spoofing (ARP attack). Choosing ARP firewall can perfectly solve all the above problems.)