We host a number of servers for customers, sharing a public IP range. We have been having intermittent problems with customers receiving ReCAPTCHA challenges in a loop. They are presented with an endless stream of images and therefore can't reach the website they need. This problem is particularly frequent when using a particular piece of software which uses the CefSharp framework as an integrated web browser. We believe that our IP range has a poor reputation with ReCAPTCHA, perhaps due to the high volume of users sharing the IP range. Is there anything we can do about this?
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Hello,
are your servers sharing an IP range, or are your customers sharing an IP range?
if you trust your users' IP addresses, it is now possible to configure an IP address allowlist for your reCAPTCHA key. You can learn more from the documentation here: https://cloud.google.com/recaptcha/docs/allowlist-ip
Hi Faube, thanks for this. Our servers share an IP range, with one customer using each server and several servers using each IP address. We do not control the website in question, but we are forwarding this info to the website owner (Sage) along with our IP range. We suspect that the volume of traffic from each IP address to ReCAPTCHA protected websites combined with the fact that the website is being accessed through CefSharp (embedded in the Sage 50 Accounts software) is making the traffic look suspicious to ReCAPTCHA.
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