Unexpected registration rate limiting error

I’m getting errors of “Too many registrations from this IP”. I’ve yet to issue my first cert; this was my second try, and the first failed with an ASN1 error when reading my CSR.

I’m using the following command as indicated by the beta email:

    $ ./letsencrypt-auto --agree-dev-preview --server https://acme-v01.api.letsencrypt.org/directory auth --csr /etc/ssl/www.example.org-letsencrypt.csr
    Error: rateLimited :: There were too many requests of a given type :: Error creating new registration :: Too many registrations from this IP

The domain is [www.]example.org and the server is running FreeBSD 10.2 at

The beta email mentions “you should avoid deleting the /etc/letsencrypt/accounts folder”, but I never touched any letsencrypt file, and only installed it once on a single server with dedicated static IP. What exactly is a “registration” and why did I hit the cap? Is there anything I can do that doesn’t involve waiting a week for my rate limit to expire?

I’m having the exact same issue, not even having issued my first cert.

Any way that I can help debug this, or do we just wait it out and try again in a week or so?

Same here…got an error on the first attempt that I had an “insecure platform warning.” Went back and did apt-get update and upgrade and re-ran. It got through the insecure platform warning and then threw this registration limiting error.

We’re looking into this; it appears to mostly affect IPv6 clients. We’re going to adjust some limits – and drop from 1 week to 1 day windows – on our side and I’ll post back.


Same thing happened to me, my virtual host has an ipv4 and ipv6 address.

Rate limit is increased to 10 registrations / day now, from 2 registrations / week. There’s also likely a bug in our IPv6 rate limit handling, and there’s an issue filed (#1046).


definitely much better thanks :slight_smile:

I got it working the first time around now, cheers!

Still having that problem. Just pulled the repo and ran the script, and failed the first time.

Error: rateLimited :: There were too many requests of a given type :: Error creating new registration :: Too many registrations from this IP

This is happening on a Linode VPS.

I am also on a Linode VPS and unable to register a domain on my first run of the script. Are you limiting these IPs by IP block or actual IP address?

I was able to start the process on another VPS service, Chunkhost, but ran into whitelisting issues that were due to me not registering those specific domains for the beta. Otherwise, it seemed to work fine on that server.

Another Linode VPS user here, and I’m seeing the same issue. My server is on both IPv4 and IPv6, for what it’s worth.

It's the same issue as above; it'll clear itself up as the rate window moves forward. I opened a Boulder issue about this, but the Boulder team has a lot on its plate moving to GA.

I'll also notify the ops team that they should consider upping the limits again.

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Wow, so the issue is that our ISP (also a Linode VPS customer here) assigns us a /64 address, our virtual neighbors suck up “our” registrations and then we can’t register or request a certificate?

On first blush that seems like bad design from the get-go; however, thinking deeper into it one of the perks of IPv6 is being able to just hand over big chunks of addresses to anyone who wants them, which means that the average Joe Blow IPv6 user could trivially bypass any IP-based rate-limiting, possibly without even knowing he’s doing it, if you took the “naive” IPv4-based approached of sticking to just a single address for rate-limiting purposes.

Is there a way to restrict the client to use IPv4, or to tell it to use a particular (virtual) network adapter when sending the request?

We’ve increased the registration rate limit again, so this should become less common (again). :slight_smile: Thanks for your patience.


YAY! Managed to register! Thanks!

I’m up and running now (the other issue I was having is that auth wasn’t working, but it turned out I didn’t have port 443 open in my firewall).

I’m also hitting this issue on a VPS (IntoVPS) registering from both IPV4 and IPV6. Yesterday I issued one cert to my server. the First attempt failed because I’m doing “certonly” and I forgot to shut down Nginx before trying to issue the cert. That seems to “use up” one attempt. Then I went to issue a second cert today (within 24 hours) and forgot to stop nginx again, the 4th time (total) I’ve tried to issue a cert I get the above error.

Looking forward to the nginx plugin working. But I have 5 domains total to get certs for. If I can’t even do two in one day… that will make spacing them well for the 60 day expiry… slow. :stuck_out_tongue:

I’ve registered around 10 times this week and I cant register anymore. Are you sure the limit is set to 10/day? For me it looks like 10/week. I only registered once yesterday and I’m not able to register anymore. Anything that could be done about that? It would really help as I cant test my stuff if I cant register anymore.

I’ll let @jcjones reply on the current value of the rate limit, but just a reminder: If you are testing, please do it against staging. We are able to be much more liberal about rate limits there (though I think currently the registration limit may be the same?).

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As of today:

  • Registrations per IP is 10 registrations per 3 hour window.
  • Certificates per name is 10 certificates per 59 days.
  • Pending registrations per account is 300 per 1 week.