Linux Security

Links

LinuxSecurity.com QuickRef
	An excellent list of security websites and tutorials.

packet storm
	Great place to find security tools and news on exploits.

CERT
	The official site for security advisories and vulnerabilities.

Top 50 security tools
	The link says it all.

Tips

Email the root user info on failed attempts to access your computer.
Here's a sample hosts.deny:

ALL: ALL: spawn ( \
echo -e "\n\
TCP Wrappers\: Connection Refused\n\
By\: $(uname -n)\n\
Process\: %d (pid %p)\n\
User\: %u\n\
Host\: %c\n\
Date\: $(date)\n\
" | /bin/mail -s "From tcpd@$(uname -n). %u@%h -> %d." root)

Note that you need a Mail Transfer Agent such as Sendmail, qmail, or postfix for this to work.

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