<rule name="Block spider">

      <match url="(^robots.txt$)"   ignoreCase="false" negate="true" />

      <conditions>

        <add   input="{HTTP_USER_AGENT}"   pattern="gptbot|facebookexternalhit|ClaudeBot|Apache-HttpClient|SemrushBot|Webdup|AcoonBot|AhrefsBot|Ezooms|EdisterBot|EC2LinkFinder|jikespider|Purebot|MJ12bot|WangIDSpider|WBSearchBot|Wotbox|xbfMozilla|Yottaa|YandexBot|Jorgee|SWEBot|spbot|TurnitinBot-Agent|curl|perl|Python|Wget|Xenu|ZmEu"   ignoreCase="true" />

      </conditions>

      <action   type="AbortRequest" />

</rule>