FileZilla self-host FTP server error

My domain is:

I ran this command: Generated certificate through FileZilla Server

It produced this output: <Date/Time> Info [Type] Message
<15/5/2024 5:06:56 μμ> Admin UI [Status] Generating ACME certificate
<15/5/2024 5:06:56 μμ> ACME [Status] Listening on
<Date/Time> Info [Type] Message
<15/5/2024 5:07:10 μμ> Administration Server [Error] Error processing generate_acme_certificate: {
<15/5/2024 5:07:10 μμ> Administration Server [Error] "detail": " Fetching Timeout during connect (likely firewall problem)",
<15/5/2024 5:07:10 μμ> Administration Server [Error] "status": 400,
<15/5/2024 5:07:10 μμ> Administration Server [Error] "type": "urn:ietf:params:acme:error:connection"
<15/5/2024 5:07:10 μμ> Administration Server [Error] }

My web server is (include version):

The operating system my web server runs on is (include version): Windows 11 Pro 23H2

My hosting provider, if applicable, is: self-host

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):

The version of my client is (e.g. output of certbot --version or certbot-auto --version if you're using Certbot):

Hello @K0D1M, welcome to the Let's Encrypt community. :slightly_smiling_face:

That tells me you are using the HTTP-01 challenge of the Challenge Types - Let's Encrypt, which states "The HTTP-01 challenge can only be done on port 80."

Presently access to Port 80 is being filtered (i.e. blocked). Best Practice - Keep Port 80 Open

This is almost always a firewall issue of not allowing Port 80 through.

>nmap -4 -Pn -p80,443
Starting Nmap 7.94 ( ) at 2024-05-15 17:15 UTC
Nmap scan report for (
Host is up (0.21s latency).
rDNS record for

80/tcp  filtered http
443/tcp open     https

Nmap done: 1 IP address (1 host up) scanned in 3.87 seconds