Maximum number of authentication requests reached for this domain name

Please fill out the fields below so we can help you better. Note: you must provide your domain name to get help. Domain names for issued certificates are all made public in Certificate Transparency logs (e.g., so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.

My domain

I ran this command:I tried to issue a certificate to Synalics NARS.

It produced this output:Maximum number of authentication requests reached for this domain name. I can see the phrase.

My web server is (include version):NAS

The operating system my web server runs on is (include version):DSM 6.2

My hosting provider, if applicable, is:synology

I can login to a root shell on my machine (yes or no, or I don’t know):Unknown

I’m using a control panel to manage my site (no, or provide the name and version of the control panel):no

The version of my client is (e.g. output of certbot --version or certbot-auto --version if you’re using Certbot):I don’t know.

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Welcome to the Let’s Encrypt Community :slightly_smiling_face:

Let’s see what we can do for you… :thinking:

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Per @jillian:

Let’s Encrypt has rate limits for many endpoints. You can read about them here:

In many cases, there is a misconfiguration of a client/host and it is failing at some stage of the issuance process and starts spamming an endpoint until it gets rate limited.


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