# LOGAR Windows Server Hub Standalone compiled executable distribution for Windows Server environments (`Server.exe`). --- ## Overview `Server.exe` is a self-contained, pre-compiled native Windows PE executable that serves as the central log aggregation, temporal persistence analyzer, and reporting hub of the LOGAR infrastructure. ### Key Architecture & Capabilities - **Pre-compiled & Dependency-Free**: Ships as a standalone Windows executable (`Server.exe`). No Python installation, pip packages, or GnuPG binaries are required on Windows Server. - **Authenticated TCP Ingestion Socket (Port 9443)**: Ingests framed OpenPGP encrypted log batches streamed from edge forwarder nodes (`Win_Client.exe` and `Linux_Client.bin`). - **Warning Persistence & Immediate Error Routing**: High-severity `ERROR`, `CRITICAL`, and `FATAL` events are promoted to `VERIFIED` immediately on their first occurrence. Operational `WARNING` and `INFO` events are evaluated against an episodic threshold, requiring persistence across at least 4 distinct client transmission cycles within a rolling 12-hour evaluation window before promotion to `VERIFIED`. - **Embedded Hermes Reporting API (Port 8443)**: Integrated REST API exposing `/api/hermes/report` for external dashboards, monitoring agents, and scrapers. - **Pure-Python OpenPGP Cryptography**: Automatically generates RSA-2048 encryption keys and a SHA-256 fingerprint on first launch without external dependencies. - **State Database**: Stores issue lifecycle records, run counters, and machine telemetry in a local SQLite database (`logar_state.db`). --- ## 1. Initializing & Generating Server Configuration ### Step 1: Automatic First-Run Generation When launched without an existing `server_config.json`, `Server.exe` automatically initializes: 1. An OpenPGP RSA-2048 encryption keypair (`private_key` and `public_key`). 2. A SHA-256 public encryption fingerprint (`server_fingerprint`). 3. A cryptographically random secret authentication token (`auth_token`). 4. Default network socket coordinates (TCP 9443, Hermes API 8443). Open PowerShell and run: ```powershell .\Server.exe ``` Output: ``` [!] Config 'server_config.json' not found. Initializing first-run configuration... [+] Successfully generated new server config and OpenPGP keypair. [+] Server Encryption Fingerprint: 375388960531264EA0648EC0D2C4E4ABC6F22AC2 [+] Saved to: server_config.json ``` ### Step 2: Configuration Fields Reference The generated `server_config.json` contains: ```json { "server_name": "LOGAR-Windows-Hub", "tcp_host": "0.0.0.0", "tcp_port": 9443, "hermes_host": "0.0.0.0", "hermes_port": 8443, "auth_token": "a1b2c3d4e5f67890abcdef1234567890...", "db_path": "logar_state.db", "evaluation_window_hours": 12, "min_persistence_runs": 4, "server_fingerprint": "375388960531264EA0648EC0D2C4E4ABC6F22AC2", "public_key": "-----BEGIN PGP PUBLIC KEY BLOCK-----\n...", "private_key": "-----BEGIN PGP PRIVATE KEY BLOCK-----\n..." } ``` | Parameter | Default | Description | | :--- | :--- | :--- | | `server_name` | `"LOGAR-Windows-Hub"` | Identifier for this hub instance | | `tcp_host` | `"0.0.0.0"` | Network interface to bind for incoming client socket traffic | | `tcp_port` | `9443` | TCP port for incoming edge log batches | | `hermes_host` | `"0.0.0.0"` | Network interface to bind for Hermes HTTP API | | `hermes_port` | `8443` | HTTP port for the Hermes reporting endpoint | | `auth_token` | *(auto-generated)* | Pre-shared authentication secret required in client envelopes | | `db_path` | `"logar_state.db"` | Path to persistent SQLite issue database | | `evaluation_window_hours` | `12` | Rolling evaluation window in hours for warning persistence | | `min_persistence_runs` | `4` | Consecutive runs required to promote warning issues to `VERIFIED` | --- ## 2. Generating Client Configuration Bundles Edge forwarders (`Win_Client.exe` and `Linux_Client.bin`) require an anonymous client configuration bundle that includes the server socket target, authentication token, and encryption public key, without exposing sensitive server names or private keys. Run the following command on the server: ```powershell .\Server.exe --create-client-config --server-host --server-port 9443 --client-out client_config.json ``` - Replace `` with the reachable IP or DNS name of your LOGAR server. - Distribute `client_config.json` to client forwarder nodes along with `Win_Client.exe` or `Linux_Client.bin`. --- ## 3. Running Interactively ```powershell .\Server.exe --config C:\LOGAR-Server\server_config.json ``` ### Command-Line Arguments | Argument | Description | | :--- | :--- | | `--config` | Path to server configuration JSON file (default: `server_config.json`) | | `--create-client-config` | Exports an anonymous client configuration bundle and exits | | `--server-host` | Hostname/IP to embed in the exported client configuration | | `--server-port` | Port to embed in the exported client configuration (default: `9443`) | | `--client-out` | Destination path for exported client configuration (default: `client_config.json`) | --- ## 4. Installing as a Continuous Windows Service Because `Server.exe` acts as a continuous server hub (listening for TCP connections and HTTP API queries), it should run persistently in the background. ### Method A: Native Windows Service via NSSM (Recommended) [NSSM (Non-Sucking Service Manager)](https://nssm.cc/) is the industry standard for wrapping standalone executables into formal Windows services managed by `services.msc`. 1. Place `Server.exe` and `server_config.json` in `C:\LOGAR-Server\`. 2. Open **Elevated PowerShell (Run as Administrator)**: ```powershell # Create deployment folder New-Item -ItemType Directory -Path "C:\LOGAR-Server" -Force Copy-Item "Server.exe", "server_config.json" -Destination "C:\LOGAR-Server\" # Install Windows Service via NSSM nssm.exe install LOGAR_Server "C:\LOGAR-Server\Server.exe" "--config C:\LOGAR-Server\server_config.json" nssm.exe set LOGAR_Server AppDirectory "C:\LOGAR-Server" nssm.exe set LOGAR_Server Description "LOGAR Central Aggregation Hub Service" nssm.exe set LOGAR_Server Start SERVICE_AUTO_START nssm.exe set LOGAR_Server AppStdout "C:\LOGAR-Server\server_out.log" nssm.exe set LOGAR_Server AppStderr "C:\LOGAR-Server\server_err.log" # Start the service nssm.exe start LOGAR_Server ``` 3. Verify status in PowerShell: ```powershell Get-Service -Name "LOGAR_Server" ``` ### Method B: Windows Task Scheduler (Startup Daemon) If third-party service wrappers are restricted by organizational policy, configure a Task Scheduler job triggered at boot under the `SYSTEM` account: ```powershell # Action: Launch Server.exe $Action = New-ScheduledTaskAction -Execute "C:\LOGAR-Server\Server.exe" ` -Argument "--config C:\LOGAR-Server\server_config.json" ` -WorkingDirectory "C:\LOGAR-Server" # Trigger: At system startup $Trigger = New-ScheduledTaskTrigger -AtStartup # Settings: Restart on failure, no execution time limit $Settings = New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries ` -DontStopIfGoingOnBatteries ` -StartWhenAvailable ` -RestartCount 3 ` -RestartInterval (New-TimeSpan -Minutes 1) ` -ExecutionTimeLimit ([TimeSpan]::Zero) # Register task under SYSTEM with highest privileges Register-ScheduledTask -TaskName "LOGAR_Server_Daemon" ` -Action $Action ` -Trigger $Trigger ` -Settings $Settings ` -User "NT AUTHORITY\SYSTEM" ` -RunLevel Highest ` -Description "LOGAR Central Hub Daemon" # Start the task immediately Start-ScheduledTask -TaskName "LOGAR_Server_Daemon" Get-ScheduledTask -TaskName "LOGAR_Server_Daemon" ``` --- ## 5. Hermes Reporting API & Health Checks Test the embedded Hermes REST endpoint locally using PowerShell: ```powershell $report = Invoke-RestMethod -Uri "http://127.0.0.1:8443/api/hermes/report" -Method GET $report | Format-Table fingerprint, status, consecutive_runs, first_seen, last_seen ``` ### Response Format: ```json [ { "fingerprint": "win-dc-01.corp.internal:DiskCorruptionDetected", "server": "win-dc-01.corp.internal", "signature": "DiskCorruptionDetected", "consecutive_runs": 4, "first_seen": "2026-09-04T08:15:00Z", "last_seen": "2026-09-04T15:00:00Z", "status": "VERIFIED", "verified": true, "os_type": "windows", "sample_message": "An error was detected on device \\Device\\Harddisk0\\DR0 during a paging operation." } ] ``` --- ## 6. Windows Defender Firewall Configuration Open the necessary inbound firewall ports to allow incoming edge forwarder socket streams and HTTP API queries: ```powershell # Allow TCP 9443 for edge log forwarding New-NetFirewallRule -DisplayName "LOGAR TCP Log Ingestion" ` -Direction Inbound ` -LocalPort 9443 ` -Protocol TCP ` -Action Allow # Allow TCP 8443 for Hermes Reporting REST API New-NetFirewallRule -DisplayName "LOGAR Hermes Reporting API" ` -Direction Inbound ` -LocalPort 8443 ` -Protocol TCP ` -Action Allow ``` --- ## 7. Uninstallation & Removal To remove the server service: ```powershell # If installed via NSSM: nssm.exe stop LOGAR_Server nssm.exe remove LOGAR_Server confirm # If installed via Task Scheduler: Unregister-ScheduledTask -TaskName "LOGAR_Server_Daemon" -Confirm:$false # Clean files Remove-Item -Recurse -Force "C:\LOGAR-Server" ```