Action required: Let's Encrypt certificate renewals

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 is:

I ran this command:
certbot renew --pre-hook “service nginx stop” --post-hook “service nginx start” --dry-run

It produced this output:
Cert not due for renewal, but simulating renewal for dry run
Starting new HTTPS connection (1):
Running pre-hook command: service nginx stop
Renewing an existing certificate
Performing the following challenges:
http-01 challenge for
Waiting for verification…
Cleaning up challenges
Generating key (2048 bits): /etc/letsencrypt/keys/0024_key-certbot.pem
Creating CSR: /etc/letsencrypt/csr/0024_csr-certbot.pem

My web server is (include version):

The operating system my web server runs on is (include version):
Debian GNU/Linux 8 (jessie)

My hosting provider, if applicable, is:

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

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):
certbot 0.9.3

We received an email regarding the end of support for ACME TLS-SNI-01 domain validation and that we need to update our ACME client to use an alternative validation method (HTTP-01, DNS-01 or TLS-ALPN-01) or our certificate renewals will break and existing certificates will start to expire.

But from the output above, does this mean that we are already using http-01 domain validation and no need to perform any changes or whatsoever?

Apologies if my question may sound a bit stupid. I’m really new to this and still learning.
Thank you in advance.

You are using HTTP-01. You're probably -- but not definitely -- okay.

I'm confused that it worked after running "service nginx stop".

Would you mind posting the contents of the files in /etc/letsencrypt/renewal/?

For what it's worth, the newest version of Certbot in jessie-backports is 0.10.2. You can upgrade.

0.10.2 is still very old, though.

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