Search /
Docfinder:
Advanced search  |  Help  |  Site map
RESEARCH CENTERS
SITE RESOURCES
Click for Layer 8! No, really, click NOW!
Networking for Small Business
TODAY'S NEWS
• First iPhone worm spreads Rick Astley wallpaper
• Four reasons to buy (and one reason to avoid) the Droid
• Stimulus for tech and telecom $3B, but jobs still guesswork
• Cisco MARS shuts out new third-party security devices
• Verizon Droid buzz muted in Boston
• Week in Google news: Google Dashboard, Droid fever, focus on e-commerce
• Cloud computing, virtualization proponents getting antsy
• Data center start-up offers energy saving software
•
• Vendors scrambling to fix bug in Net's security
• Judge dismisses lawsuit challenging Gartner's Magic Quadrant
• Boston Celtics clamp down on spam
• Cloud computing inevitable? Not so fast, educator says
• Blue Coat slashes staff, buys S7 services company
• Apple seeks new sheriff to lock up iPhones
•


Web/E-business /
Send to a friend Feedback

Spammer tricks of the trade

NOTE: We are launching a new and improved Fusion this weekend. Some things may not look or work right for a bit. Our apologies for the inconvenience!

Today's News

ICANN board approves reform agenda

House committee subpoenas WorldCom executives

KPMG Consulting to hire Andersen IT staff, not unit

Xerox accounting troubles may total $6 billion

Analysis: Ciena/ONI deal done


All of today's news

By Suzanne Gaspar
Network World, 05/13/02

These are methods used by spammers to avoid detection:

  • Frequently changing IP addresses.
  • Using different ISPs.
  • Sending smaller batches and single sends to avoid detection.
  • Using tools to locate open third-party relays - a mail server open to process e-mail from unauthorized servers, where the sender and receiver are not local users.
  • Using the Camouflage program to hide files for passing through filters undetected.
  • HTML messages with Java script-encrypted frame tags that launch body text after by-passing filters.
  • Non-working or deceptive opt-out links that serve to verify active e-mail addresses.
  • Using a Sendmail server, telnet or netcat utility to connect to an SMTP port where the SMTP exchange commands or e-mail header information are falsified/spoofed including the sender's e-mail address and even server received: lines.
  • Sending spam from the recipient to the recipient.
  • Adding randomness to each message by adding/deleting characters and spaces in subject and body text.
  • Building in hops via proxy servers and open relays to make it hard to track the origin.

    • Related Links

    Apply for your free subscription to Network World. Click here. Or get Network World delivered in PDF each week.

    Get Copyright Clearance
    Request a reprint or permission to use this article.


    NWFusion offers more than 40 FREE technology-specific email newsletters in key network technology areas such as NSM, VPNs, Convergence, Security and more.
    Click here to sign up!
    New Event - WANs: Optimizing Your Network Now.
    Hear from the experts about the innovations that are already starting to shake up the WAN world. Free Network World Technology Tour and Expo in Dallas, San Francisco, Washington DC, and New York.
    Attend FREE
    Your FREE Network World subscription will also include breaking news and information on wireless, storage, infrastructure, carriers and SPs, enterprise applications, videoconferencing, plus product reviews, technology insiders, management surveys and technology updates - GET IT NOW.