SSL certificate error (timeout during connection [likely firewall probrem]

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:sudo certbot certonly --standalone --preferred-challenges http --agree-tos --email -d

It produced this output: Fetching Timeout during connect (likely firewall problem)

My web server is (include version):
The operating system my web server runs on is (include version):Ubuntu 22.04 x64

My hosting provider, if applicable, is:vultr

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):

Is port 80 open in your firewall? Is your domain pointing to the same machine you are running certbot on?


i dont know how to check the port in firewall and i dont know the command i am just copy and paste the command so if you can guide me to check the port if it is open and the solution to my problem

guide on how to check if port is open on my firewall please

I don't know how vultr works, if they have more firewalls in front of the machines they sell (if it's there, it's configurable).

This is a quickstart for the ubuntu firewall:


thanks for your help now it running


For in the future, may I make a recommendation? It seems there were just 5 minutes between @9peppe s post and your next post requesting for more guidance.

I'm pretty sure you didn't scoured the entire web looking for a possible answer in that limited amount of time. I'd like to suggest an attitude more revolving on trying to sort something out yourself properly before asking others for help. It might take some time, effort and possibly frustration, but learning to be more self-taught will in the end help you more.

Especially as this is a Let's Encrypt Community and not a generic "How does my firewall work" Community :slight_smile:


thanx for advice


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