References Corporate Security on the Internet http://www.newsviews.info/techbytes02.html Securing an Edge of Network Server IPSec http://ou800doc.sco.com/en/NET_ipsec/ipsec_top.html UNIX Security Checklist v2.0 http://www.cert.org/tech_tips/unix_security_checklist2.0.html UNIX Configuration Guidelines http://www.cert.org/tech_tips/unix_configuration_guidelines.html Anonymous FTP Configuration Guidelines http://www.cert.org/tech_tips/anonymous_ftp_config.html CERT (us) http://www.us-cert.gov/ Preventing Denial of Service Attacks http://www.onlamp.com/pub/a/bsd/2004/06/24/anti_dos.html