Come for the products,
stay for the community

The Atlassian Community can help you and your team get more value out of Atlassian products and practices.

Atlassian Community about banner
Community Members
Community Events
Community Groups

Windows, BitBucket & Let's Encrypt Tutorial


This is probably better as an article, but here's my experience of setting up a free Let's Encrypt certificate on a Windows server running BitBucket 4 or 5. Lots of moving parts, so take your time. This is based on my set up so your mileage may vary depending on your own setup/environment.

This is using Atlassian's built-in server on port 8443 to function, but this is easily adapted for your own port/proxy/forwarder set up. If you're forwarding SSL via IIS, I highly recommend "win-acme" (used to be called lets-encrypt-win-simple) which can automate renewals;

Things go wrong, and you're sensible, right? You're a good server admin and you're going to back up any changes first, right? Well done.

A Let's Encrypt certificate needs to be renewed every 3 months - this takes around 10 minutes each time so 40 minutes a year to renew a "free" certificate is pretty good.


Create / Renew Cert 

  • Go to: 
  • Create an account or log in to an existing one.
  • Add or renew a certificate in your list. Going to assume you've got an FQDN set up and pointing at your server IP, e.g.,
  • If you're adding a new cert for the first time, you'll need to verify you own the domain (Let's Encrypt uses the domain validation scheme to authenticate you). This usually involves adding a file to the root of the server with the code they supply or adding DNS settings (my preferred method) with the same unique key as a TXT record.
  • Once validated, tick box (or click the link) to download all the certificates generated for you. Feel free to do CSR, it's not a requirement for this tutorial.
  • Unzip the files into a location you can remember, e.g., "/Downloads/ssl/".

Convert to P12 format

  • Create a new file called "bundle.pem", e.g., Right click -> New Text File.
  • In this order, paste the contents of the downloaded files into the new .pem file. 




  • Open Ubuntu WSL command prompt and CD to the SSL location (e.g. /mnt/c/youraccountfolder/downloads/ssl/. If you're running a Linux VM or box, copy the file to your Linux home folder and alter the following paths as required.
  • Run: openssl pkcs12 -export -in bundle.pem -inkey private.key -out bitbucket.p12
  •  Copy the "bitbucket.p12" file to your BitBucket server and paste it to "C:\Atlassian\ApplicationData\Bitbucket\shared\config\ssl-keystore", which is the default home directory for BitBucket.

Import into keystore

  • If it exists, delete or rename the existing "bitbucket.jks" file from "C:\Atlassian\ApplicationData\Bitbucket\shared\config\ssl-keystore".  I tend to re-create the PKS file every time
  • In command prompt, paste - and change the password (!): "%JAVA_HOME%\bin\keytool" -importkeystore -deststorepass yourpassword -destkeystore C:\Atlassian\ApplicationData\Bitbucket\shared\config\ssl-keystore\bitbucket.jks -srckeystore C:\Atlassian\ApplicationData\Bitbucket\shared\config\ssl-keystore\bitbucket.p12 -srcstoretype PKCS12 

Server Config / Properties

The first time you set up SSL, you'll need to alter the v4 server.xml file or in v5 the file, both found here: "C:\Atlassian\ApplicationData\Bitbucket\shared".

For version 4:


For version 5:


I've made no other changes to these files.

Restart BitBucket Service

Restart the BitBucket server and head off to your domain but instead of ":7990" in the end (if you're running in the default Windows set up of BitBucket), change the port to 8443 (or whatever port you set up in the config file).

Optional: Export for JIRA 

If you're also self-hosting JIRA, you're likely going to want to export the certificate so that you can import it into JIRA's keystore.

  • In command prompt: "%JAVA_HOME%\bin\keytool" -export -alias 1 -file C:\Atlassian\ApplicationData\Bitbucket\shared\config\ssl-keystore\bitbucket.cer -keystore C:\Atlassian\ApplicationData\Bitbucket\shared\config\ssl-keystore\bitbucket.jks 
  • This creates a new .cer file in the same directory as the .jks file.
  • Assuming you have JIRA installed in the same default location as mine, use the path shown. If asked for a password, the default keystore password is usually "changeit". You may need to create a new keystore for JIRA (or this may create it, I can't remember). If you're renewing, and have not deleted the existing JIRA keystore file, increment the "alias" number at the end of the line (you can use a name if you prefer). In command prompt, paste and alter as required: "%JAVA_HOME%\bin\keytool" -importcert -file C:\Atlassian\ApplicationData\Bitbucket\shared\config\ssl-keystore\bitbucket.cer -keystore "C:\Program Files\Atlassian\JIRA\jre\lib\security\cacerts" -alias 1

That's it, so we now have BitBucket running on a quarterly renewable Let's Encrypt certificate with the same cert imported into JIRA to authenticate access to BitBucket from within JIRA. If you want to secure JIRA with SSL, not that I've done that yet, I'm sure you could repeat these steps and adapt them for JIRA's installation paths and config files.


Thank you. Glad this guide exists. Worked like a breeze!

Like Jay Hayman likes this

Following this guide got me over the last hurdle in setting up jira and bitbucket Application Links using a LetsEncrypt wildcard cert! 




Log in or Sign up to comment
Community showcase
Published in Bitbucket

Git push size limits are coming to Bitbucket Cloud starting April 4th, 2022

Beginning on April 4th, we will be implementing push limits. This means that your push cannot be completed if it is over 3.5 GB. If you do attempt to complete a push that is over 3.5 GB, it will fail...

2,156 views 2 9
Read article

Community Events

Connect with like-minded Atlassian users at free events near you!

Find an event

Connect with like-minded Atlassian users at free events near you!

Unfortunately there are no Community Events near you at the moment.

Host an event

You're one step closer to meeting fellow Atlassian users at your local event. Learn more about Community Events

Events near you