最初的地方

Guarddog

• Guarddog
• The Guarddog Handbook
• quick-guide-to-guarddog
• Enable a Firewall on Ubuntu with Guarddog | Hackosis

安裝
$ sudo aptitude install guarddog

recommend should be open on most desktop users computers：

Chat > IRC
Chat > Jabber
Chat > MSN
Chat > Yahoo
Data Serve -> NTP
File Transfer > HTTPS
File Transfer > HTTP
File Transfer > FTP
Miscellaneous > PGP Key Server
Mail -> IMAP
Mail -> SMTP
Mail -> POP3
Network -> DNS
Network -> Ping

control panel and/or webmail

2082 (non SSL Cpanel port -- using http://)
2083 (SSL Cpanel port -- using https://)
2095 (non SSL webmail port)
2096 (SSL webmail port)