Whitelist IPs from BuyPass for ACME HTTP challenge


Until some time, we were able to whitelist BuyPass IPs in order to perform the HTTP ACME challenge.

We got the information from this page which was:


IPv6: 2a03:520::/29


We now see that requests are coming from dynamic sources owned by Amazon, so I'm wondering if this IP whitelisting is not longer possible or what would be the recommended action to whitelist the challenge for restricted environments using HTTP challenges.


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  • Hi. Could you please contact us at support@buypass.com?
    There shouldn't be any changes that causes this.

    Best regards, Daniel.

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  • 1 yr agoLast active
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