>hi all, i'm with win2k server in my office 23 workstation, and how do i configure it,
>like setting firewall, make proxy,defence from virus, how secure between internet connection sharing and proxy, and how do i protect user A/B can't access the MIRC but enabled to WWW,use A/B can't access the WWW but enabled to MIRC
>

I've had tremendous success with Trend Micro's ServerProtect and Corporate OfficeScan combination, in conjunction with SonicWall's SOHO/2 router/firewall/VPN hardware; you can control Internet permissions fairly easily by blocking ports on a per-user or per-IP address basis.