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Unknown robot eating up bandwidth

8:57 am on Sep 1, 2009 (gmt 0)

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I am watching my AWStats data and following are eating up my bandwidth heavily. What are those? Can I control them eating up unnecessary bandwidth?

Unknown robot (identified by empty user agent string)
Unknown robot (identified by 'robot')
Unknown robot (identified by 'spider')

Thanks in advance for any help.

4:57 am on Sept 4, 2009 (gmt 0)

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WebmasterWorld Senior Member tangor is a WebmasterWorld Top Contributor of All Time 10+ Year Member Top Contributors Of The Month

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Do you have a robots.txt file? Whitelist the bots you want. Nuke (.htaccess) the rest. Cleans up your logs very nicely!
2:17 am on Sept 8, 2009 (gmt 0)

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Tangor is right. In my logs - I saw one of Amazon's bots on my site all the time and I "disallowed" this certain bot in my robots.txt file.
7:34 pm on Sept 13, 2009 (gmt 0)

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There is a possibility that the bots are not robots.txt friendly. AFTER you try robots.txt restrictions if the problem persists you may try to identify and restrict the IPs. Tangors solution is a nice balance of the two and white-listing is the ideal way of controlling crawler access.