
Securing Red Hat:
http://tldp.org/LDP/solrhe/Securing−Optimizing−Linux−RH−Edition−v1.3/index.html
Tools for creating custom ipchains and iptables firewall scripts: •
Firestarter: http://firestarter.sourceforge.net
Two related projects: http://seawall.sourceforge.net/ for ipchains, and
http://shorewall.sourceforge.net/ for iptables.
Netfilter and iptables documentation from the netfilter developers (available in many other languages
as well):
•
FAQ: http://netfilter.samba.org/documentation/FAQ/netfilter−faq.html
Packet filtering: http://netfilter.samba.org/documentation/HOWTO/packet−filtering−HOWTO.html
Networking: http://netfilter.samba.org/documentation/HOWTO/networking−concepts−HOWTO.html
NAT/masquerading: http://netfilter.samba.org/documentation/HOWTO/NAT−HOWTO.html
Port number assignments, and what that scanner may be scanning for: •
http://www.linuxsecurity.com/resource_files/firewalls/firewall−seen.html
http://www.sans.org/newlook/resources/IDFAQ/oddports.htm
http://www.iana.org/assignments/port−numbers, the official assignments.
General security sites. These all have areas on documentation, alerts, newsletters, mailing lists, and
other resources.
•
Linux Security.com: http://www.linuxsecurity.com, loaded with good info, and Linux specific. Lots
of good docs: http://www.linuxsecurity.com/docs/
CERT, http://www.cert.org
The SANS Institute: http://www.sans.org/
The Coroner's Toolkit (TCT): http://www.fish.com/security/, discussions and tools for dealing with
post break−in issues (and preventing them in the first place).
Privacy: •
Junkbuster: http://www.junkbuster.com, a web proxy and cookie manager.
PGP: http://www.gnupg.org/
Other documentation and reference sites: •
Security Quick−Start HOWTO for Red Hat Linux
8.4.9. Viruses 61
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