非常优秀的防火墙和VPN网关，自带有各种服务（web、ftp、mail等）
全面支持：
VPN Pro Office IPsec VPN
PPTP VPN
Managed VPN + Dynamic IP Firewall and Network Security
1-to-1 NAT support
DMZ support Stateful Firewall
Intrusion detection
Intrusion prevention
E-mail Antispam engine
Antivirus engine (fees apply)
SMTP authentication
SMTP gateway
SMTP server
POP and IMAP servers
Webmail
Filtering Banner ad blocking
Web proxy
Content filtering
Bandwidth manager
Network Support DSL (including PPPoE)
Cable Modem
802.11b Wireless
Internal DHCP server
Caching DNS server
Hardware minimum requirements
Hardware and Software RAID
1, 2 and 4 processor support
Easy Configuration Web-based configuration
Optional Webmin package
Web Server Apache web server
Support for CGI and PHP
Secure/SSL support
File Services
FTP server Windows file server
AppleShare file server
Printing Print server support
Printer sharing for Windows
官方下载：http://www.clarkconnect.org/webapp/downloads.jsp
其他：ftp://218.25.120.3/ClarkConnectOffice2.2
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