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Level-3 Defense Plan

I believe this plan provides about the best online protection that you can develop and maintain under the constraints of resonable investment of time and modest investment of money.

Benjamin Franklin once said, "The best way to be safe is to never feel secure." I used to call the former version of this Level-3 plan my Paranoid defense. Things have changed a great deal since then (then being the 20th -- not the 18th century). It was a great deal easier to be a full fledged paranoiac in the past.

These days, it would take a full-time staff of five or six to be properly paranoid. I just call it "Level-3" now, and try to be as paranoid as is practical. You might want to digress to this introductory article to get a view of how the online world has become the Wild Wooly West and how your defenses should change.

The plan below is only a checklist. The links in each item lead to the essential details for putting the plan in action. Don't try to do it all at once. Take it one step at a time, and check each item off as you go.
  1. Gain a better understanding of the hazards online and how defenses work.
    1. Learn about the nature of malacious computer code.
    2. Learn how attacks work.
    3. Learn about the defense tools that are available.
    4. Subscribe to Microsoft's update notices, and to a security oriented newsletter or two. Security Pipeline and Brian's Buzz are a couple of good examples.
     
  2. Don't use Outlook Express, Internet Explorer, Windows Media Player or Microsoft Word. Use Mozilla (free) as your browser and either Mozilla Mail (comes with Mozilla), Pegasus, Eudora, or Courier as your email client. See "Setting up Your Email Client".
     
  3. Install a robust firewall. If you're using Internet Connection Firewall (ICF) install a better one: ICF is reasonably good, but even Microsoft has a list of alternatives. Disable ICF first to avoid conflict with the new firewall. Update: Microsoft intends to provide a better version of ICF in the second half of 2004.
     
  4. Install anti-malware and anti-Trojan software, in addition to antivirus software and your firewall. Yes, you need all four. Enable automatic signature file updating for the first three too, or update the files yourself every time you go online for the first time that day.
     
    Firewall: ZoneAlarm Pro. Antivirus: NOD32 -- enable real-time scanning. Anti-malware: PestScan. Anti-Trojan: Trojan Hunter -- enable real-time protection. NOTE: All of this software offers real-time protection. You may not be able to enable it on all four because of conflicts. I'll update this note later. Send an email with questions or comments -- --.
Get detailed information on items 5 thru 8 at the SANS Institute.
  1. Use settings for Windows that will provide a solid security foundation: Windows is "too smart for its own good." There are too many hidden junk processes running in the background. That sets up gaping security holes. It's fairly easy to close them.
     
  2. Use settings for Internet Explorer (or other browser) that will avoid the perils of Web sites: Even if you have a policy to avoid risky Web sites, more dirty tricks are finding their way onto legitimate Web sites. The dirty tricks are often triggered when you click a banner ad or pop-up message.
     
  3. Use settings for Outlook Express (or other email client) that will avoid the perils of HTML messages: That way, you can safely examine each message before you actually open it. Don't rely on an anti-virus program -- use that as your safety net.
     
  4. Patch (update) Windows, Internet Explorer and Outlook Express (or any alternate programs) when new security holes are discovered. This element requires diligence and patience, and it entails some risk. [update notices] There is an alternative, which I'll reluctantly explain as well.
     
  1. Examine all email messages before you process them further: Your own wits and common sense are your best peripheral defense against bogus email. Before you open your email, examine your list of new email messages, discard the spam and any messages that look at all suspicious -- even messages from someone you know.
    Prescreen any that are questionable, and finally, open just the ones you fully trust. See "Safe Email Practices".
     
  2. Never open an email attachment unless you're 99.999% sure it's OK: Be suspicious of any attachment you were not expecting -- even if it's from someone you know. Check with the sender first before you open it and even then be cautious. Be doubly suspicious of forwarded attachments, or attachments from someone you don't know. You can improve your online security by 10 to 1 if you're always careful with email attachments. See "Step 2. Handling attachments safely" and Step 3. Safe file handling.
     
  3. Never download any files unless you know you can trust the source: Unfortunately, that advice includes pictures and music. Scan all files for viruses, malware and Trojans before you open them. All the precautions on the "Safe File Handling" page should be part of your prudence.
     
  4. Don't visit to risky Web sites -- gothic, warez, crackz, gamer, cheat code, tres equis and sites of that ilk: And be doubly suspicious of any unsolicited Web page -- pop up windows -- unexpected requests to "log on again," etc. Stay away from Web sites that you don't know, unless you have a good reason to trust them. In particular, don't click on links in email messages if you don't know where they lead. See "Safe Surfing Practices". Use the OffByOne browser to check a site if you need to bend this rule.
     
  5. Don't use instant messaging or IRC (Internet Relay Chat), or download files from P2P file-sharing networks, such as KaZaa or Morpheus. [details]
     
  6. Limit what you put at risk to what you're willing to loose or what you can easily replace. Never keep critical personal information on your computer -- information like sensitive passwords, account numbers or your social security number -- and never send it online without strong encryption. Use good password protection practices as well.
     
  7. Backup everything you can't replace or would hate to lose: Digital pictures -- the book you're writing -- recipes -- genealogy records -- whatever. If you're not willing to loose all the work you have invested in setting up your computer, be sure you always have a current drive image to fall back on. See "Backup" and "System Backup".
     
  8. Encrypt all personal information that you keep on your hard drive. Don't work with it online except when you're connected to a secure Web site. Purge your hard drive with "NecroFile" first, and then install "SafeHouse".
     
  9. Be wary of scams, fraud and hoaxes online: There's a higher percentage of con-artists online than there is in real life, because it's so easy to hide online. Virtually all spam contains a scam of some kind.
"Don't let the fact that you're paranoid obscure the fact that they're out to get you." -- Miss Anthrope
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