Search Engine Tricks

  Homes arrow Search Engine Tricks arrow Robots, Agents and Spiders - Identifying Sear...
 Webmaster Tools
Base64 Encoding 
Browser Settings 
CSS Coder 
CSS Navigation Menu 
Datetime Converter 
DHTML Tooltip 
Dig Utility 
DNS Utility 
Dropdown Menu 
Fetch Content 
Fetch Header 
Floating Layer 
htaccess Generator 
HTML Encoder 
HTML Entities 
IP Convert 
Meta Tags 
Password Encryption
Password Strength
Pattern Extractor 
Ping Utility 
Pop-Up Window 
Regex Extractor 
Regex Match 
Scrollbar Color 
Source Viewer 
Syntax Highlighting 
URL Encoding 
Web Safe Colors 
Forums Sitemap 
Weekly Newsletter
Developer Updates  
Free Website Content 
 RSS  Articles
 RSS  Forums
 RSS  All Feeds
Write For Us 
Contact Us 
Site Map 
Privacy Policy 
  >>> SIGN UP!  
  Lost Password? 

Robots, Agents and Spiders - Identifying Search Engine Crawlers
By: Developer Shed
  • Search For More Articles!
  • Disclaimer
  • Author Terms
  • Rating:  stars stars stars stars stars / 0

    Table of Contents:

    Rate this Article: Poor Best 
      Del.ici.ous Digg
      Blink Simpy
      Google Spurl
      Y! MyWeb Furl
    Email Me Similar Content When Posted
    Add Developer Shed Article Feed To Your Site
    Email Article To Friend
    Print Version Of Article
    PDF Version Of Article




    Robots, Agents and Spiders - Identifying Search Engine Crawlers

    If you've been surfing search engine optimization web sites, you've no doubt come across the above being mentioned on many occasions.

    Crawlers, Agents, Bots, Robots and Spiders
    Five terms all describing basically the same thing, but in this article they'll be referred to collectively as spiders or "agents". A search engine spider is an automated software program used to locate and collect data from web pages for inclusion in a search engine's database and to follow links to find new pages on the World Wide Web. The term "agent" is more commonly applied to web browsers and mirroring software.

    If you've ever examined your server logs or web site traffic reports, you've probably come across some weird and wonderful names for search engine spiders, including "Fluffy the Spider" and Slurp. Depending upon the type of web traffic reports you receive, you may find spiders listed in the "Agents" section of your statistics.

    Not all spiders are good
    Who actually owns these spiders? It's good to know the beneficial from the bad. Some agents are generated by software such as Teleport Pro, an application that allows people to download a full "mirror" of your site onto their hard drives for viewing later on, or sometimes for more insidious purposes such as plagiarism. If you have a large or image heavy site, the practice of web site stripping could also have a serious impact on your bandwidth usage each month.

    Banning spiders and agents
    If you notice entries like Teleport Pro and WebStripper in your traffic reports, someone's been busy attempting to download your web site. You don't have to just sit back and let this happen. If you are commercially hosted, you'll be able to add a couple of lines to your robots.txt file to prevent repeat offenders from stripping your site.

    The robots.txt file gives search engine spiders and agents direction by informing them what directories and files they are allowed to examine and retrieve. These rules are called The Robots Exclusion Standard.

    To prevent certain agents and spiders from accessing any part of your web site, simply enter the following lines into the robots.txt file:

    User-agent: NameOfAgent
    Disallow: /

    Ensure that you enter the name of the agent exactly as it appeared in your reports/logs e.g. Teleport Pro/1.29 and that there is a separate entry for each agent. Skip a line between entries. You could do the same to exclude search engine spiders, but somehow I don't think you'll really want to do this :0). The "/" in the above example means disallow access to any directory. You can also disallow access by spiders and agents to certain directories e.g.

    User-agent: *
    Disallow: /cgi-bin/

    In this example the asterisk (wildcard) indicates "all". Don't use the asterisk in the Disallow statement to indicate "all", use the forward slash instead.

    If you don't have a robots.txt file, create one in notepad and upload it to the docs directory (or the root of whichever directory your web pages are stored in). Never use a blank robots.txt file as some search engines may see this as an indication that you don't want your site spidered at all! Have at least one entry in the file.

    Unfortunately, defining web stripper agents and spiders in your robots.txt file won't work in all cases as some mirroring software applications have the ability to mimic web browser identifiers; but at least it's some protection that may save you some valuable bandwidth.

    If you're not able to create a robots.txt file, which is usually the case if you are hosted by a free hosting service, this tool may be useful:

    Search engine spider identification
    The following is a basic listing of search engine spider names and their "owners". This is by no means complete, as there are many thousands of search engines on the Internet, but it covers the more common beneficial spiders. Look for these in your traffic reports or search for the names through your server logs to discover which pages they have been spidering. You'll find that many of the entries will also have accompanying numbers or letters e.g Googlebot/2.1 or

    Spider name 

    Spider owner

    Architext spider 
    FAST-WebCrawler  FAST ( 
    Ask Jeeves
    crawler@fast   FAST (
    InfoSeek sidewinder 
    Fluffy the Spider
    Sleek Spider


    If you have spotted any significant activity from these spiders in your reports or logs, there's a good chance that you'll be listed on that particular search engine. But you'll need to be patient; some Search Engines take up to 6 months to refresh their databases!

    Copyright information....
    This article is free for reproduction but must be reproduced in its entirety & this copyright statement must be included. Visit to view great articles, tutorials and tools for site owners, web developers and Internet marketers! Subscribe for free to our popular ecommerce/web design ezine!

    DISCLAIMER: The content provided in this article is not warranted or guaranteed by Developer Shed, Inc. The content provided is intended for entertainment and/or educational purposes in order to introduce to the reader key ideas, concepts, and/or product reviews. As such it is incumbent upon the reader to employ real-world tactics for security and implementation of best practices. We are not liable for any negative consequences that may result from implementing any information covered in our articles or tutorials. If this is a hardware review, it is not recommended to open and/or modify your hardware.

    More Search Engine Tricks Articles
    More By Developer Shed



    - Time for Your Site`s SEO Tune-up?
    - The Basic Parts of an SEO Campaign
    - Dynamic Content Still Challenging for Search...
    - Google`s Panda Update at One Year Old
    - Why Links Don`t Count Instantly
    - Check Your Code for SEO Issues
    - To Be an SEO, Start With What You Know
    - Don`t Worry About Bad Inbound Links
    - Guard Your Google Places Listing
    - Overlooked SEO Tricks
    - A Simple Long Tail Keyword Strategy
    - Writing for the Long Tail
    - Choosing and Using Keywords
    - Seven More SEO Myths That Can Hurt Your Sit...
    - Google Tips and Tricks

    Developer Shed Affiliates


    © 2003-2018 by Developer Shed. All rights reserved. DS Cluster - Follow our Sitemap