142 lines
No EOL
4.4 KiB
Markdown
142 lines
No EOL
4.4 KiB
Markdown
# Minecraft Windows Network Configuration
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This guide provides PowerShell commands to configure Windows Firewall for Minecraft networking.
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## Prerequisites
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- Windows 10 or later
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- PowerShell running as Administrator
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- Java Runtime Environment (JRE)
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## Check Installed Java Versions
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First, let's check which Java versions are installed on your system:
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```powershell
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# List all Java installations
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Get-Command java -ErrorAction SilentlyContinue | Select-Object Source
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Get-ChildItem "C:\Program Files\Java" -ErrorAction SilentlyContinue
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Get-ChildItem "C:\Program Files (x86)\Java" -ErrorAction SilentlyContinue
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Get-ChildItem "$env:LOCALAPPDATA\Programs\Java" -ErrorAction SilentlyContinue
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Get-ChildItem "$env:APPDATA\ATLauncher\jre" -ErrorAction SilentlyContinue
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```
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## Firewall Configuration
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Open PowerShell as Administrator and run the following commands:
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### 1. Allow Java through Windows Firewall (Dynamic Selection)
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```powershell
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# Function to create firewall rules for a specific Java path
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function Add-MinecraftJavaFirewallRules {
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param (
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[string]$JavaPath
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)
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if (Test-Path $JavaPath) {
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Write-Host "Adding firewall rules for Java at: $JavaPath"
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New-NetFirewallRule -DisplayName "Minecraft Java" -Direction Inbound -Program $JavaPath -Action Allow
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New-NetFirewallRule -DisplayName "Minecraft Java" -Direction Outbound -Program $JavaPath -Action Allow
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} else {
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Write-Host "Java path not found: $JavaPath"
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}
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}
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# Get all possible Java paths
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$javaPaths = @(
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"C:\Users\rob\AppData\Roaming\ATLauncher\jre\bin\java.exe",
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"C:\Program Files\Java\*\bin\java.exe",
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"C:\Program Files (x86)\Java\*\bin\java.exe",
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"$env:LOCALAPPDATA\Programs\Java\*\bin\java.exe"
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)
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# Find all existing Java installations
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$foundJavaPaths = $javaPaths | ForEach-Object { Get-ChildItem $_ -ErrorAction SilentlyContinue } | Select-Object -ExpandProperty FullName
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if ($foundJavaPaths.Count -gt 1) {
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Write-Host "Multiple Java installations found:"
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for ($i = 0; $i -lt $foundJavaPaths.Count; $i++) {
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Write-Host "[$i] $($foundJavaPaths[$i])"
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}
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$selection = Read-Host "Enter the number of the Java installation to use (or 'all' for all installations)"
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if ($selection -eq 'all') {
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foreach ($path in $foundJavaPaths) {
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Add-MinecraftJavaFirewallRules -JavaPath $path
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}
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} else {
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$index = [int]$selection
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if ($index -ge 0 -and $index -lt $foundJavaPaths.Count) {
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Add-MinecraftJavaFirewallRules -JavaPath $foundJavaPaths[$index]
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} else {
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Write-Host "Invalid selection"
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}
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}
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} else {
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# If only one Java installation is found, use it automatically
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if ($foundJavaPaths) {
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Add-MinecraftJavaFirewallRules -JavaPath $foundJavaPaths[0]
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} else {
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Write-Host "No Java installations found"
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}
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}
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```
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### 2. Open Required Minecraft Ports
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```powershell
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# Allow Minecraft default port (25565)
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New-NetFirewallRule -DisplayName "Minecraft TCP" -Direction Inbound -LocalPort 25565 -Protocol TCP -Action Allow
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New-NetFirewallRule -DisplayName "Minecraft UDP" -Direction Inbound -LocalPort 25565 -Protocol UDP -Action Allow
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```
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### 3. Verify Rules
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```powershell
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# List all Minecraft-related firewall rules
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Get-NetFirewallRule | Where-Object DisplayName -like "*Minecraft*" | Format-Table DisplayName, Enabled, Direction, Action
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```
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## Removing Rules
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If you need to remove the firewall rules, use these commands:
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```powershell
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# Remove Minecraft firewall rules
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Remove-NetFirewallRule -DisplayName "Minecraft Java"
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Remove-NetFirewallRule -DisplayName "Minecraft TCP"
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Remove-NetFirewallRule -DisplayName "Minecraft UDP"
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```
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## Notes
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- Make sure to run PowerShell as Administrator
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- The script will automatically detect Java installations
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- Default Minecraft port is 25565, adjust if using a different port
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- These rules allow both incoming and outgoing connections for Minecraft
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## Troubleshooting
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If you experience connection issues:
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1. Verify the rules are enabled:
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```powershell
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Get-NetFirewallRule -DisplayName "Minecraft*" | Select-Object DisplayName, Enabled
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```
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2. Check if the ports are actually open:
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```powershell
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Test-NetConnection -ComputerName localhost -Port 25565
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```
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3. Ensure Java is running with proper permissions:
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```powershell
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Get-Process java | Select-Object Id, ProcessName, Path
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```
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4. Check Java version:
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```powershell
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java -version
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``` |