Remote Host for Manifest Generator

Configure OpenSSH on a remote Windows host so AxiomEditor can upload client patches via SFTP.

The Manifest Generator in AxiomEditor can upload client patches directly to your update server over SFTP. This guide walks through installing and configuring OpenSSH on the remote Windows host so that upload works out of the box.

This guide covers the remote host (the machine that serves patches to players). You run AxiomEditor on your local dev machine - no SSH setup is needed there.

Prerequisites

Requirement	Details
OS	Windows Server 2019+ or Windows 10 1809+ (OpenSSH is a built-in optional feature)
Access	Administrator or Remote Desktop access to the host
Web server	Nginx, Apache, IIS, or any HTTP server already serving your update folder
Firewall	Ability to open TCP port 22 (or your chosen SSH port)

1. Install OpenSSH Server

OpenSSH ships as an optional Windows feature since Windows Server 2019 / Windows 10 1809. No third-party downloads needed.

PowerShell (recommended)

Open PowerShell as administrator:

# Check if OpenSSH Server is available
Get-WindowsCapability -Online | Where-Object Name -like 'OpenSSH.Server*'

# Install it
Add-WindowsCapability -Online -Name OpenSSH.Server~~~~0.0.1.0

If the capability isn't listed (older builds), install manually from the Microsoft OpenSSH releases.

Settings GUI

2. Start and enable the SSH service

# Start the service
Start-Service sshd

# Set it to start automatically on boot
Set-Service -Name sshd -StartupType Automatic

# Verify it's running
Get-Service sshd

You should see Status: Running.

3. Configure the SFTP subsystem

OpenSSH on Windows includes the SFTP subsystem by default. Verify it's enabled in the SSH config:

notepad C:\ProgramData\ssh\sshd_config

Confirm this line exists and is not commented out:

Subsystem sftp sftp-server.exe

If the file doesn't exist yet, start the sshd service once and it will generate the default config at C:\ProgramData\ssh\sshd_config.

If you made any changes, restart the service:

Restart-Service sshd

4. Open the firewall

The installer usually creates a firewall rule automatically. Verify it exists:

Get-NetFirewallRule -Name *ssh*

If no rule exists, create one:

New-NetFirewallRule -Name sshd -DisplayName 'OpenSSH Server (sshd)' `
  -Enabled True -Direction Inbound -Protocol TCP -Action Allow -LocalPort 22

If your host provider has an external firewall (Azure NSG, AWS Security Group, Hetzner firewall, etc.), open port 22 there too.

5. Set up a Windows user account

AxiomEditor authenticates with a username and password. The account needs read/write access to the update folder.

Use the existing Administrator

If you already RDP in as Administrator, you can use those same credentials in AxiomEditor. No extra setup needed - skip to step 6.

Create a dedicated user

6. Verify SSH works

From your local dev machine (where AxiomEditor runs), open a terminal and test:

ssh Administrator@YOUR_HOST_IP

Accept the host key fingerprint when prompted. If you get a command prompt on the remote machine, SSH is working. Type exit to disconnect.

If this step fails, AxiomEditor's upload will fail too. Common issues:

• Connection refused: sshd service not running, or firewall blocking port 22.

• Permission denied: Wrong username or password.

• Connection timed out: External firewall (cloud provider) hasn't opened port 22.

7. Configure AxiomEditor

Open AxiomEditor and go to the Manifest Generator tab. Fill in the Upload section:

Field	Value	Example
Enable Upload	Checked
Host	Remote host IP or hostname	62.84.187.28
Port	SSH port	22
Username	Windows account on the host	Administrator
Password	Account password
Remote Path	Folder on the host where patches are served	C:\nginx\html\muupdate
Streams	Concurrent upload connections (1-32)	16

Click Save Config to persist these settings to manifest.ini alongside AxiomEditor.

The Remote Path should point to the directory your web server serves over HTTP. The client launcher downloads patches from this folder. For Nginx, this is typically a subdirectory under html\.

8. Set up Nginx to serve the update files

AxiomEditor uploads patch files to the remote host via SFTP, but players download them over HTTP. You need a web server on the remote host to serve the update folder. Nginx is the recommended option.

Install Nginx

1. Download the latest Windows build from nginx.org (the "Stable" zip).

2. Extract to C:\nginx-1.28.1 (or wherever you prefer).

3. Replace conf\nginx.conf with the configuration below.

Nginx configuration

worker_processes  1;

events {
    worker_connections  1024;
}

http {
    include       mime.types;
    default_type  application/octet-stream;

    sendfile        on;
    tcp_nopush      on;
    tcp_nodelay     on;
    keepalive_timeout  65;

    # Increase output buffers for better throughput
    output_buffers 4 512k;
    postpone_output 1460;

    server {
        listen       80;
        server_name  _;

        # Frontend (React SPA)
        location / {
            root   C:/nginx-1.28.1/html/frontend/dist;
            index  index.html;
            try_files $uri $uri/ /index.html;
        }

        # Backend API proxy
        location /api {
            proxy_pass http://127.0.0.1:3001;
            proxy_http_version 1.1;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        }

        # MU Auto-Updater - optimized for large file downloads
        location /update/ {
            alias C:/nginx-1.28.1/html/muupdate/;

            # Enable larger sendfile chunks
            sendfile_max_chunk 2m;

            # Aggressive caching for files (version is in manifest)
            add_header Cache-Control "public, max-age=31536000";

            # Disable caching for manifest only
            location = /update/manifest.json {
                alias C:/nginx-1.28.1/html/muupdate/manifest.json;
                add_header Cache-Control "no-cache, no-store, must-revalidate";
            }

            location = /update/version.dat {
                alias C:/nginx-1.28.1/html/muupdate/version.dat;
                add_header Cache-Control "no-cache, no-store, must-revalidate";
            }
        }

        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }
    }
}

Key points about this config

Location	What it does
/	Serves your website frontend (React SPA with client-side routing)
/api	Proxies API requests to your backend on port 3001
/update/	Serves the update folder — this is what the client launcher hits

Caching strategy: All patch files under /update/ are cached aggressively (1 year) because the client uses the manifest to decide what to download — file URLs effectively change when content changes. manifest.json and version.dat are explicitly set to no-cache so the launcher always gets the latest version info.

The alias path in the /update/ block must match the Remote Path you configured in AxiomEditor. If AxiomEditor uploads to C:\nginx-1.28.1\html\muupdate, the alias must point there too.

Create the update folder and start Nginx

# Create the update folder if it doesn't exist
mkdir C:\nginx-1.28.1\html\muupdate

# Test the config for syntax errors
C:\nginx-1.28.1\nginx.exe -t

# Start Nginx
Start-Process -FilePath "C:\nginx-1.28.1\nginx.exe" -WorkingDirectory "C:\nginx-1.28.1"

Make Nginx start on boot

Nginx on Windows doesn't install as a service by default. Use NSSM (Non-Sucking Service Manager) to wrap it:

# Download nssm and place it somewhere in PATH, then:
nssm install nginx "C:\nginx-1.28.1\nginx.exe"
nssm set nginx AppDirectory "C:\nginx-1.28.1"
nssm start nginx

Open port 80 in the firewall

New-NetFirewallRule -Name nginx-http -DisplayName 'Nginx HTTP' `
  -Enabled True -Direction Inbound -Protocol TCP -Action Allow -LocalPort 80

Verify it works

After AxiomEditor uploads a manifest, open a browser and navigate to:

http://YOUR_HOST_IP/update/manifest.json

You should see the JSON manifest with your file list and version number. If this works, the client launcher will be able to download patches.

8b. Alternative: Set up IIS to serve the update files

If you prefer IIS over Nginx (common on Windows Server where IIS is already installed), use this setup instead of step 8.

Install IIS

PowerShell (recommended)

# Install IIS with static content serving
Install-WindowsFeature -Name Web-Server -IncludeManagementTools

Server Manager GUI

Create the update site folder

mkdir C:\inetpub\muupdate

Set this as your Remote Path in AxiomEditor.

Configure IIS

Open IIS Manager (inetmgr) and either add a virtual directory to the Default Web Site or create a new site.

Virtual directory (simplest)

1. In IIS Manager, expand Sites -> Default Web Site.

2. Right-click -> Add Virtual Directory.

3. Alias: update

4. Physical path: C:\inetpub\muupdate

5. Click OK.

Players will access patches at http://YOUR_HOST_IP/update/manifest.json.

Dedicated site

Add a web.config for caching and MIME types

Create C:\inetpub\muupdate\web.config:

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
  <system.webServer>

    <!-- Serve .dat and .json files correctly -->
    <staticContent>
      <remove fileExtension=".dat" />
      <mimeMap fileExtension=".dat" mimeType="application/octet-stream" />
      <remove fileExtension=".json" />
      <mimeMap fileExtension=".json" mimeType="application/json" />
      <remove fileExtension=".bmd" />
      <mimeMap fileExtension=".bmd" mimeType="application/octet-stream" />
      <remove fileExtension=".ozj" />
      <mimeMap fileExtension=".ozj" mimeType="application/octet-stream" />
      <remove fileExtension=".ozt" />
      <mimeMap fileExtension=".ozt" mimeType="application/octet-stream" />
      <remove fileExtension=".ozb" />
      <mimeMap fileExtension=".ozb" mimeType="application/octet-stream" />
      <remove fileExtension=".ozd" />
      <mimeMap fileExtension=".ozd" mimeType="application/octet-stream" />
      <remove fileExtension=".att" />
      <mimeMap fileExtension=".att" mimeType="application/octet-stream" />
      <remove fileExtension=".map" />
      <mimeMap fileExtension=".map" mimeType="application/octet-stream" />
    </staticContent>

    <!-- Aggressive caching for all patch files -->
    <httpProtocol>
      <customHeaders>
        <add name="Cache-Control" value="public, max-age=31536000" />
      </customHeaders>
    </httpProtocol>

    <!-- Directory browsing off -->
    <directoryBrowse enabled="false" />

  </system.webServer>

  <!-- No-cache for manifest.json and version.dat -->
  <location path="manifest.json">
    <system.webServer>
      <httpProtocol>
        <customHeaders>
          <remove name="Cache-Control" />
          <add name="Cache-Control" value="no-cache, no-store, must-revalidate" />
        </customHeaders>
      </httpProtocol>
    </system.webServer>
  </location>

  <location path="version.dat">
    <system.webServer>
      <httpProtocol>
        <customHeaders>
          <remove name="Cache-Control" />
          <add name="Cache-Control" value="no-cache, no-store, must-revalidate" />
        </customHeaders>
      </httpProtocol>
    </system.webServer>
  </location>

</configuration>

IIS blocks unknown file extensions by default (returns 404). The <staticContent> block above registers all MU client file types so IIS serves them. Without this, players get download failures on .bmd, .ozj, .ozt, etc.

Grant folder permissions

The IIS worker process (IIS_IUSRS) needs read access, and your SFTP upload user needs write access:

# IIS read access
icacls "C:\inetpub\muupdate" /grant "IIS_IUSRS:(OI)(CI)RX" /T

# SFTP upload user write access (if using a dedicated user)
icacls "C:\inetpub\muupdate" /grant "axiom-upload:(OI)(CI)F" /T

Open port 80 in the firewall (IIS)

IIS typically adds its own firewall rule during install. Verify:

Get-NetFirewallRule -Name *iis* , *http* , *web*

If no rule exists:

New-NetFirewallRule -Name iis-http -DisplayName 'IIS HTTP' `
  -Enabled True -Direction Inbound -Protocol TCP -Action Allow -LocalPort 80

Verify IIS is serving updates

After AxiomEditor uploads a manifest:

http://YOUR_HOST_IP/update/manifest.json

You should see the JSON manifest. If you get a 404 on .dat or .bmd files, check that the web.config MIME types are in place.

9. Test the full pipeline

1. Set Client Folder to your compiled client output directory.

2. Set Output Folder to a local staging directory (e.g. D:\manifest_output).

3. Click Generate Manifest.

4. AxiomEditor runs 5 phases: scan, hash, copy, create manifest, upload.

5. Phase 5 (SFTP upload) connects to the remote host and uploads only changed files.

On the first run, all files are uploaded. Subsequent runs use delta sync - only files whose CRC32 hash changed since the last manifest are transferred.

How the upload works

Understanding the upload mechanics helps troubleshoot issues:

1. AxiomEditor connects to the host via SFTP (SSH file transfer protocol).

2. It downloads the existing manifest.json from the remote path (if any).

3. It compares local vs remote file hashes.

4. Only changed or new files are uploaded. Deleted files are removed from the remote.

5. manifest.json and version.dat are always uploaded last.

6. Multiple SFTP connections run in parallel (controlled by the Streams setting).

Troubleshooting

Upload fails with "connection refused" or timeout

• Verify sshd is running: Get-Service sshd on the remote host.

• Check Windows Firewall: Get-NetFirewallRule -Name *ssh*.

• Check external firewall (cloud provider panel).

• Test from your local machine: ssh Username@Host -p Port.

Upload fails with "permission denied"

• Double-check the username and password in AxiomEditor.

• Verify the user can log in via SSH: ssh Username@Host.

• If using a non-admin user, confirm it has write access to the remote path: icacls "C:\nginx\html\muupdate".

Upload succeeds but client launcher can't download patches

• The remote path must match your web server's document root. Files uploaded via SFTP are just files on disk - the web server (Nginx/IIS/Apache) must be configured to serve that directory over HTTP.

• Check that manifest.json is accessible in a browser: http://YOUR_HOST_IP/muupdate/manifest.json.

Upload is slow

• Increase the Streams setting (up to 32) for more parallel connections.

• First upload transfers everything. Subsequent uploads are incremental (delta sync) and much faster.

• Check network bandwidth between your machine and the host.

"Subsystem request failed" error

The SFTP subsystem isn't enabled. Open C:\ProgramData\ssh\sshd_config on the remote host and ensure the Subsystem sftp sftp-server.exe line is uncommented. Restart sshd after editing.

Security considerations

The password is stored in plain text in manifest.ini next to AxiomEditor. Keep this file on your dev machine only - do not distribute it with client or server bundles.

• Consider using a dedicated user with access only to the update folder, not the full Administrator account.

• If your host supports it, change the SSH port from the default 22 to reduce automated scan noise. Update the Port field in AxiomEditor to match.

• Disable SSH password authentication entirely once you've confirmed AxiomEditor works, and switch to key-based auth if your workflow supports it (advanced - requires manual SSH key setup outside AxiomEditor).