What happens if dynamic IP changes?

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. crt.sh | example.com), so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.

My domain is: mymachine.twilightparadox.com

My web server is (include version): standalone

The operating system my web server runs on is (include version):debian 10.4

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

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): 0.31.0

If my dynamic IP changes, will that "break" tls, so a new certificate is needed ASAP?

1 Like

No, it won't influence existing certificates. There is no relation between the IP address used for authorization of a previous certificate and Let's Encrypt certificates.


"What happens if dynamic IP changes?"

If you wish to continue serving that domain, you will need to update the DNS entry for that name.
[or, although your site still has a valid cert for that name, no one will be able to find your server]

So if you are using dynamic IPs, you should use something like a Dynamic DNS service to automatically update the IP for your domain name.

1 Like

Thank you to both of you. I am set up with a Dynamic DNS service that checks & updates every 30 minutes. So it is possible for my server to be down for around 30 minutes. What I was wonderingI was if I would need a new certificate after that time was up. But it sounds like it should work fine. My IP hasn't changed in 2 years anyway.


The cert only has name(s) on it.
The names are resolved via DNS.
The Dynamic DNS service is there to update DNS for you should the IP change.


What, if any, dynamic DNS service are you using?

1 Like

FreeDNS. Simple and no issues. Good support.

1 Like

This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.