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We periodically (more frequently recently) have very agressive crawling activity coming from EC2 instances that give us a user agent that looks like "AF_ID=". I've looked around for common User-Agent formats and I cannot seem to find any references to these User Agents. Do any of you know what these would be, or is it just a generic user-agent used by EC2 instances?

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Do you have sofware on your server that accesses the pages internally? Its possible to set user-agents to anything melodramatically. Makes it possible that its a bot or software. – Frank Jun 26 '12 at 7:19

It's just some random scam/spam crawler hosted on EC2. My only advice, add this to your .htaccess :

RewriteCond %{HTTP_USER_AGENT} .*AF_ID=* [NC]
RewriteRule ^.*$ http://english-1335426938.spampoison.com/English [R=303,L] 
#http://tinyurl.com/troll-face-bot :)
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And you're basing that "random spam" assessment on what? – Su' Jul 31 '12 at 18:34
On the fact that it's not an usual user agent, and agressive crawling activity. It's the usual flag to ban... – Dark Aug 6 '12 at 9:24
@Su' respectable bots link to their policy page in a url in the user-agent – ZJR Aug 31 '12 at 4:18

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