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zoffline

zoffline enables the use of Zwift offline by acting as a partial implementation of a Zwift server. By default zoffline is only for a single player. See Step 6: Enable Multiplayer for how to enable support for multiple users/profiles.

zoffline also offers riding against ghosts (your previous rides). Enable this feature by checking "Enable ghosts" in zoffline's launcher. See zoffline#56 for extra details.

Additionally, zoffline's launcher allows selecting a specific map to ride on without mucking about with config files.

Install

Setting up zoffline requires two primary steps. First, zoffline must be installed and run on a system before running Zwift (either on the system running Zwift or on another locally networked system). Second, Zwift must be configured to use zoffline instead of the official Zwift server.

Step 1: Install zoffline

There are three ways with which to install and run zoffline depending on your platform:

Simplest (Windows only) To install zoffline on Windows:
Linux, Windows, or Mac OS X (from source) To install zoffline on Linux, Windows, or Mac OS X:
  • Install Python 3 (https://www.python.org/downloads/) if not already installed
    • On Windows, installing Python via the Microsoft Store is highly recommend! If using a Python installer, ensure that in the first Python installer screen "Add Python 3.x to PATH" is checked.
    • Python 2 remains supported for now, but it is not recommended.
  • Install dependencies: flask, flask_sqlalchemy, flask-login, pyjwt, gevent, python-protobuf, protobuf3_to_dict, stravalib (optional)
    • e.g., on Linux/Mac: pip3 install flask flask_sqlalchemy flask-login pyjwt gevent protobuf protobuf3_to_dict stravalib
    • e.g., on Windows in command prompt: pip install flask flask_sqlalchemy flask-login pyjwt gevent protobuf protobuf3_to_dict stravalib
      • You may need to use C:\Users\<username>\AppData\Local\Programs\Python\Python39\Scripts\pip.exe instead of just pip
  • Clone or download this repo
  • If you are not running zoffline on the same PC that Zwift is running: create a server-ip.txt file in the storage directory containing the IP address of the PC running zoffline.
  • Run standalone.py before starting Zwift
    • e.g., on Linux/Mac: sudo ./standalone.py
      • sudo is needed because we're binding to the privileged ports 80 and 443.
      • If using Python 3, but Python 3 is not your system default run sudo python3 standalone.py
    • e.g., on Windows in command prompt: python standalone.py
      • You may need to use C:\Users\<username>\AppData\Local\Programs\Python\Python39\python.exe instead of just python
  • Start Zwift with standalone.py running (after completing step 2)
  • Note: When upgrading zoffline, be sure to retain the storage directory. It contains your Zwift progress state.

zoffline can be installed on the same machine as Zwift or another local machine.

Using Docker
  • Install Docker
  • Create the docker container with:
    docker create --name zwift-offline -p 443:443 -p 80:80 -p 3022:3022/udp -p 3023:3023 -v </path/to/host/storage>:/usr/src/app/zwift-offline/storage -e TZ=<timezone> zoffline/zoffline
    • You can optionally exclude -v </path/to/host/storage>:/usr/src/app/zwift-offline/storage if you don't care if your Zwift progress state is retained across zoffline updates (unlikely).
    • The path you pass to -v will likely need to be world readable and writable.
    • A list of valid <timezone> values (e.g. America/New_York) can be found here.
    • Adding --restart unless-stopped will make zoffline start on boot if you have Docker v1.9.0 or greater.
  • If you are not running zoffline on the same PC that Zwift is running: create a server-ip.txt file in the </path/to/host/storage> directory containing the IP address of the PC running zoffline.
  • Start zoffline with: docker start zwift-offline
Using Docker Compose
  • Install docker-compose
  • Either use the docker-compose.yml file in this repo which will build from the Dockerfile, or use this example compose file: 
    services:
   zoffline:
        image: zoffline/zoffline:latest
        container_name: zoffline
        network_mode: host
        environment:
           - TZ=Europe/London
        volumes:
           - ./storage/:/usr/src/app/zwift-offline/storage
        ports:
           - 80:80
           - 443:443
           - 3022:3022/udp
           - 3023:3023
        restart: unless-stopped
  • If you are not running zoffline on the same PC that Zwift is running: create a server-ip.txt file in the storage directory containing the IP address of the PC running zoffline.
  • Start zoffline with: docker-compose up -d

Step 2: Configure Zwift client to use zoffline

Windows Instructions
  • Install Zwift
    • If your Zwift version is 1.0.81847, you're all set.
    • If Zwift is not installed, install it before installing zoffline.
    • If your Zwift version is newer than 1.0.81847 and zoffline is running from source: copy C:\Program Files (x86)\Zwift\Zwift_ver_cur.xml to zoffline's cdn/gameassets/Zwift_Updates_Root/ overwriting the existing file.
    • If your Zwift version is newer than 1.0.81847 and zoffline is not running from source: wait for zoffline to be updated.
  • NOTE: instead of performing the steps below you can instead just run the configure_client script from https://github.com/zoffline/zwift-offline/releases/tag/zoffline_helper
  • On your Windows machine running Zwift, copy the following files in this repo to a known location:
    • ssl/cert-zwift-com.p12
    • ssl/cert-zwift-com.pem
  • Open Command Prompt as an admin, cd to that location and run
    • certutil.exe -importpfx Root cert-zwift-com.p12
      • For Windows 7: run certutil.exe -importpfx cert-zwift-com.p12 instead
    • If you're prompted for a password, just leave it blank. There is no password.
  • In the same command prompt run type cert-zwift-com.pem >> "C:\Program Files (x86)\Zwift\data\cacert.pem"
    • Note: Appending cert-zwift-com.pem via Notepad will not work (#62)
  • Open Notepad as an admin and open C:\Windows\System32\Drivers\etc\hosts
    • Append this line: <zoffline ip> us-or-rly101.zwift.com secure.zwift.com cdn.zwift.com launcher.zwift.com
      (Where <zoffline ip> is the ip address of the machine running zoffline. If it's running on the same machine as Zwift, use 127.0.0.1 as the ip.)
  • If you wish to leave the hosts file unchanged except for when specifically using zoffline, you may optionally use the launch.bat script within the scripts directory to launch zoffline instead of using the normal Zwift Launcher. See #121 for details.

Why: We need to redirect Zwift to use zoffline and convince Windows and Zwift to accept zoffline's self signed certificates for Zwift's domain names. Feel free to generate your own certificates and do the same.

Mac OS X Instructions
  • Install Zwift
    • If your Zwift version is 1.0.80953, you're all set.
    • If Zwift is not installed, install it before installing zoffline.
    • If your Zwift version is newer than 1.0.80953: copy ~/Library/Application Support/Zwift/ZwiftMac_ver_cur.xml to zoffline's cdn/gameassets/Zwift_Updates_Root/ overwriting the existing file.
  • On your Mac machine running Zwift, copy the following files in this repo to a known location:
    • ssl/cert-zwift-com.p12
    • ssl/cert-zwift-com.pem
  • Open Keychain Access, select "System" under "Keychains", select "Certificates" under "Category"
    • Click "File - Import Items..." and import ssl/cert-zwift-com.p12
    • Right click "*.zwift.com", select "Get Info" and under "Trust" choose "When using this certificate: Always Trust".
    • If you're prompted for a password, just leave it blank. There is no password.
  • In a terminal within the directory ssl/cert-zwift-com.pem was copied to, run cat cert-zwift-com.pem >> ~/Library/Application\ Support/Zwift/data/cacert.pem
    • Note: Appending the contents of ssl/cert-zwift-com.pem with a text editor doesn't work (#62)
  • Using a text editor (with admin privileges) open /Applications/Zwift.app/Contents/Info.plist
    • Append these keys: 
      <key>NSAppTransportSecurity</key>
<dict>
    <key>NSExceptionDomains</key>
    <dict>
        <key>zwift.com</key>
        <dict>
            <key>NSExceptionAllowsInsecureHTTPLoads</key>
            <true/>
            <key>NSIncludesSubdomains</key>
            <true/>
        </dict>
    </dict>
</dict>
  • For Big Sur run sudo codesign --force --deep --sign - /Applications/Zwift.app in terminal. See zoffline#132 for extra details.
  • Using a text editor (with admin privileges) open /etc/hosts
    • Append this line: <zoffline ip> us-or-rly101.zwift.com secure.zwift.com cdn.zwift.com launcher.zwift.com
      (Where <zoffline ip> is the ip address of the machine running zoffline. If it's running on the same machine as Zwift, use 127.0.0.1 as the ip.)

Why: We need to redirect Zwift to use zoffline and convince OS X and Zwift to accept zoffline's self signed certificates for Zwift's domain names. Feel free to generate your own certificates and do the same.

Android (non-rooted device)
  • Install required apps:
    • Download and install zoffline-obb.apk from here
    • Download "Host Changer VPN - The Game Changer" from Google Play (link)
    • Create a hosts.txt file to use with the app (you could use a text editor app or create it online with an online tool such as this). The file must look like this (replace <zoffline ip> with the IP address of the machine running zoffline):
    <zoffline ip> us-or-rly101.zwift.com
<zoffline ip> secure.zwift.com
<zoffline ip> cdn.zwift.com
    • Run Host Changer, select created hosts.txt file and press the button
    • Note: If you know what you're doing and have a capable enough router you can adjust your router to alter these DNS records instead of using the "Host Changer VPN" app.
  • Patch after every installation or update:
    • Install/update Zwift from Google play, but do not start it yet.
      • If you have already started it go to Android Settings > Applications > Zwift and clear data or uninstall and reinstall the app.
    • Open the ZofflineObb app and run it (allow access to storage)
    • Wait for process to finish (5-10min)
    • Run Zwift, hopefully it verifies download and runs
  • Play Zwift:
    • Host Changer button must be ON
    • Start Zwift and sign in using any email/password
      • If multiplayer is enabled, access https://<zoffline ip>/signup/ to sign up and import your files. (You must accept an invalid certificate alert).

Why: We need to redirect Zwift to use zoffline (this is done by the VPN app) and convince Zwift to accept zoffline's self signed certificates for Zwift's domain names (this is done by the patch tool ZofflineObb).

Android (rooted device)
  • Install Zwift on the device
  • Open Zwift once to complete installation (i.e download all extra files).
  • Append the contents of ssl/cert-zwift-com.pem to /data/data/com.zwift.zwiftgame/dataES/cacerts.pem on the device
    • Note: this file will only exist after the first run of Zwift since it's downloaded after the initial install
    • Recommended approach for appending the contents (due to #62):
      • adb push ssl/cert-zwift-com.pem /data/data/com.zwift.zwiftgame/dataES/
      • In adb shell: cd /data/data/com.zwift.zwiftgame/dataES/
      • In adb shell: cat cert-zwift-com.pem >> cacert.pem
      • However you do it, ensure the permissions and ownership of the file remains the same.
  • Modify the device's /etc/hosts file
    • Append this line: <zoffline ip> us-or-rly101.zwift.com secure.zwift.com cdn.zwift.com
      (Where <zoffline ip> is the IP address of the machine running zoffline.)
    • If no text editor on the device, recommend:
      • adb pull /etc/hosts
      • (modify on PC)
      • adb push hosts /etc/hosts
    • Note: If you know what you're doing and have a capable enough router you can adjust your router to alter these DNS records instead of modifying your hosts file.
  • Start Zwift and sign in using any email/password

Why: We need to redirect Zwift to use zoffline and convince Zwift to accept zoffline's self signed certificates for Zwift's domain names. Feel free to generate your own certificates and do the same.

Enabling/Disabling zoffline

To use Zwift online like normal, comment out or remove the line added to the hosts file before starting Zwift. Then ensure Zwift is fully closed (right click the Zwift system tray icon and exit) and restart Zwift.

Step 3 [OPTIONAL]: Obtain current Zwift profile

Expand

If you don't obtain your current Zwift profile before first starting Zwift with zoffline enabled, you will be prompted to create a new profile (height, weight, gender). Your profile can be further customized and changed via the in game menu (e.g. name, nationality, weight change, etc).

To obtain your current profile:

  • Ensure zoffline is disabled.
  • Run scripts/get_profile.py -u <your_zwift_username>
  • Move the resulting profile.bin (saved in whatever directory you ran get_profile.py in) into the storage directory.
    • If using zoffline.exe on Windows, create a storage directory within the same folder as zoffline.exe if it does not already exist.
    • If multiplayer is enabled, use the profile button in the launcher window to import your file.
    • If using Docker, move profile.bin into the path you passed to -v

Step 4 [OPTIONAL]: Upload activities to Strava

Expand
  • Install dependencies: stravalib
    • e.g., on Linux/Mac: pip3 install stravalib
    • e.g., on Windows in command prompt: pip install stravalib
      • You may need to use C:\Users\<username>\AppData\Local\Programs\Python\Python39\Scripts\pip.exe instead of just pip
    • Or, if using the Windows zoffline.exe version without Python installed you can run strava_auth.exe obtained from https://github.com/zoffline/zwift-offline/releases/tag/zoffline_helper in place of scripts/strava_auth.py below.
  • [OPTIONAL] Get CLIENT_ID and CLIENT_SECRET from https://www.strava.com/settings/api
  • Run scripts/strava_auth.py --client-id CLIENT_ID --client-secret CLIENT_SECRET
    • Run without arguments to use default values.
  • Open http://localhost:8000/ and authorize.
  • Move the resulting strava_token.txt (saved in whatever directory you ran strava_auth.py in) into the storage/<player_id> directory.
    • If multiplayer is enabled, use the profile button in the launcher window to import your file.

Step 5 [OPTIONAL]: Upload activities to Garmin Connect

Expand
  • Install dependencies: garmin-uploader, cryptography (optional)
    • e.g., on Linux/Mac: pip3 install garmin-uploader cryptography
    • e.g., on Windows in command prompt: pip install garmin-uploader cryptography
      • You may need to use C:\Users\<username>\AppData\Local\Programs\Python\Python39\Scripts\pip.exe instead of just pip
  • Create a file garmin_credentials.txt in the storage/<player_id> directory containing your login credentials 
    <username>
<password>
    • Note: this is not secure. Only do this if you are comfortable with your login credentials being stored in a clear text file.
    • If multiplayer is enabled, use the profile button in the launcher window to encrypt the credentials file.

Step 6 [OPTIONAL]: Enable multiplayer

Expand

To enable support for multiple users perform the steps below. zoffline's previous multi-profile support has been superceded by full multiplayer support. If you were previously using multiple profiles with zoffline you will need to enable multiplayer to continue supporting multiple users.

  • Create a multiplayer.txt file in the storage directory.
  • If you are not running zoffline on the same PC that Zwift is running: create a server-ip.txt file in the storage directory containing the IP address of the PC running zoffline.
    • TCP ports 80, 443, 3023 and UDP port 3022 will need to be open on the PC running zoffline if its running remotely.
  • Start Zwift and create an account in the new Zwift launcher and upload your profile.bin, strava_token.txt, and/or garmin_credentials.txt if you have them.
    • This account will only exist on your zoffline server and has no relation with your actual Zwift account.

Extra optional steps

Expand
  • To obtain the official map schedule and update files from Zwift server: create a cdn-proxy.txt file in the storage directory. This can only work if you are running zoffline on a different machine than the Zwift client.
  • To enable the password reset feature when multiplayer is enabled: create a gmail_credentials.txt file in the storage directory containing the login credentials of a Gmail account. You need to enable the "Less secure app access" in the account settings and you may need to access https://accounts.google.com/DisplayUnlockCaptcha to allow the login from the server.
  • To enable the Discord bridge bot: pip3 install discord and create a discord.cfg file in the storage directory containing 
    [discord]
token = 
webhook = 
channel = 
welcome_message = 
help_message =
  • If the Zwift client is having issues connecting to the Linux server ("The request was aborted: Could not create SSL/TLS secure channel." or "The underlying connection was closed: An unexpected error occurred on a send. Received an unexpected EOF or 0 bytes from the transport stream."): change MinProtocol in /etc/ssl/openssl.cnf to TLSv1.0 
    [system_default_sect]
MinProtocol = TLSv1.0
CipherString = DEFAULT@SECLEVEL=1

Community Discord and zoffline (online) server

Please join the community supported Discord and their enhanced version of zoffline, hosted Online!

Follow the guide in #instructions to create your account and join other Zwifters.

Dependencies

Docker

-or-

Note

Future Zwift updates may break zoffline until it's updated. While zoffline is enabled Zwift updates will not be installed. If a zoffline update broke something, check the CHANGELOG for possible changes that need to be made.

Don't expose zoffline to the internet, it was not designed with that in mind.

If zoffline is out of date from Zwift's official client If zoffline is behind in support of the latest Zwift client it can be updated (if running Linux) to run using the latest Zwift version by running this script from within the zwift-offline repository: https://gist.github.com/zoffline/b874e93e24439f0f4fbd7b55f3876fd2

Note: there is no guarantee that an untested Zwift update will work with zoffline. However, historically, Zwift updates rarely break zoffline.

Disclaimer

Zwift is a trademark of Zwift, Inc., which is not affiliated with the maker of this project and does not endorse this project.

All product and company names are trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them.

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