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<p class="MsoNormal">Hi, Kenyon<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We had exactly this issue with T&F, but the browser in question was Firefox. After we investigated and identified the person responsible, they stated that while attempting to access content, their browser would reload in quick succession
and appear to get caught in an infinite loop trying to reload. I shared this with T&F and they confirmed that this behavior could have triggered the IP block, and they removed the block.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Since that experience, I have asked vendors to confirm that different content is actually being accessed before they block our IP(s). My argument has been that multiple downloads of the same page of an article aren’t really a security issue
or a violation of our license agreements (I mean, it is excessive downloading, but why would a patron intentionally download the same PDF page hundreds of times, and why would it really matter?).
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We also had another experience where the user didn’t know where their computer was saving downloaded content, so they kept manually downloading the same article again and again. That also triggered a block due to rapid, excessive downloading
detected by the provider. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hope this helps…<o:p></o:p></p>
<p class="MsoNormal">Best,<o:p></o:p></p>
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<p class="MsoNormal">--<o:p></o:p></p>
<p class="MsoNormal">Joe Marciniak<o:p></o:p></p>
<p class="MsoNormal">Electronic Resources Librarian<o:p></o:p></p>
<p class="MsoNormal">Princeton University<o:p></o:p></p>
<p class="MsoNormal">One Washington Road<o:p></o:p></p>
<p class="MsoNormal">Princeton, NJ 08544-2098<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b>From:</b> Eril-l <eril-l-bounces@lists.eril-l.org> <b>On Behalf Of
</b>Sara Hills<br>
<b>Sent:</b> Monday, January 23, 2023 3:19 PM<br>
<b>To:</b> Kenyon Stuart <kstuart@umich.edu>; eril-l@lists.eril-l.org<br>
<b>Subject:</b> Re: [Eril-l] Taylor & Francis blocking IP addresses due to excessive use<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black">Hello Kenyon -<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black">Yes, we've experienced the same thing. We've had a number of reports of on-campus IP addresses being blocked. We're still trying to figure out what the cause was/is.<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black">I'm happy to know we're not alone!<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
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<p class="MsoAutoSig"><span style="font-family:"Garamond",serif">Sara K Hills</span><o:p></o:p></p>
<p class="MsoAutoSig"><span style="font-family:"Garamond",serif">Electronic Resources and Serials Librarian</span><o:p></o:p></p>
<p class="MsoAutoSig"><i><span style="font-family:"Garamond",serif">Interim Head of Acquisitions and Resource Management</span></i><o:p></o:p></p>
<p class="MsoAutoSig"><span style="font-family:"Garamond",serif">American University, Washington DC 20016</span><o:p></o:p></p>
<p class="MsoAutoSig"><span style="font-family:"Garamond",serif">202-885-3203</span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"><b><span style="color:black">From:</span></b><span style="color:black"> Eril-l <<a href="mailto:eril-l-bounces@lists.eril-l.org">eril-l-bounces@lists.eril-l.org</a>> on behalf of Kenyon Stuart <<a href="mailto:kstuart@umich.edu">kstuart@umich.edu</a>><br>
<b>Sent:</b> Monday, January 23, 2023 2:49 PM<br>
<b>To:</b> <a href="mailto:eril-l@lists.eril-l.org">eril-l@lists.eril-l.org</a> <<a href="mailto:eril-l@lists.eril-l.org">eril-l@lists.eril-l.org</a>><br>
<b>Subject:</b> [Eril-l] Taylor & Francis blocking IP addresses due to excessive use</span>
<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="xxmsonormal" style="background:#FCF4E9;border:none;padding:0in"><strong><span style="font-size:12.5pt;font-family:"Arial",sans-serif;color:#961E28;text-transform:uppercase">External Email:</span></strong><span style="font-size:12.5pt;font-family:"Arial",sans-serif;color:black">
Use caution with links and attachments.</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif">Hello,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif">We received a few reports last week from Taylor & Francis that they had temporarily blocked one of our IP addresses because of excessive connection to Taylor & Francis Online
(<a href="https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Furldefense.com%2Fv3%2F__http%3A%2F%2Ftandfonline.com__%3B!!IaT_gp1N!wSm7aYZLkckv-8S1C-SYwjntc5qMzp8ODu3z8wutJm7cSZGTO_AYW6G5VUdGKWibs7S8xyLzjwiA4eHfEuc%24&data=05%7C01%7Cjm110%40princeton.edu%7C757bbfdb26d64de51b8808dafd7f9191%7C2ff601167431425db5af077d7791bda4%7C0%7C0%7C638101021597300771%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000%7C%7C%7C&sdata=OwaCGmQYMCAPXLkzpIU9U8z2jBnnBsPv3fsqjeqPoMw%3D&reserved=0">tandfonline.com</a>).
The activity occurs over a period of one or two minutes and involves dozens of connections to only 1 or 2 pages. The block seems to occur after 100 total connection attempts.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif">Our IT group investigated and suggested the activity could be due to a buggy browser. We've contacted a few users and they mentioned they were using Chrome and Zotero.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif">Has anyone else experienced similar issues with Taylor & Francis Online or with Chrome or Zotero? If yes, do you have any suggestions on what we can do or should investigate?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif">Thank you,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal">Kenyon Stuart<o:p></o:p></p>
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<p class="MsoNormal"><span style="color:#222222">Electronic Resource Management</span> Unit<o:p></o:p></p>
<p class="MsoNormal">320 Harlan Hatcher Graduate Library<o:p></o:p></p>
<p class="MsoNormal">University of Michigan<o:p></o:p></p>
<p class="MsoNormal">Ann Arbor, Michigan 48109-1190 USA<o:p></o:p></p>
<p class="MsoNormal"><span style="color:black">email:</span><span style="color:blue"> <a href="mailto:kstuart@umich.edu" target="_blank">kstuart@umich.edu<br>
</a></span><span style="color:black"><o:p></o:p></span></p>
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