Security Options:
Hardware firewall
- Cable/DSL routers (see above)
Dedicated firewall machine
- 486/66+ & Linux, via iptables (ipchains in earlier versions)
Windows software:
Security Issues:
- Unauthorized access to your system
- by the bored or curious
- by the malicious
- by other bad guys
- malicious ability to read/write/delete/format
- Trojan access programs
- Remote control programs — Back Orifice, NetBus, Hack-a-Tack, etc.
- Attacks through your system to others, pretending to be you.
- Mail spamming, pretending to be you
- Mail spamming, not pretendig to be you
- Bad guys using your computer as a webserver for porn
- Bad guys using your computer in phishing / fraud schemes
- How to identify attack instances and attackers.
- Prevention is the key – much better than response afterwards
Other possible uses for firewalls:
- By protocol, port #, source, destination, request or response, or by physical network card
- Block inbound packets and log penetration attempts
- Block outbound packets — to make sure files & printers not shared!
- Block access to/from certain sites or from certain in-house machines
- block adult sites
- block/restrict child’s computer
- Block banner advertising (by source site)
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