Whitelisting ATAS ports and IPs in your Windows VPS firewall can help improve connection stability and reduce interruptions — especially during high-volume trading hours. Follow the steps below to create both inbound and outbound rules using Windows Defender Firewall with Advanced Security.

IPs and ports last verified: July 2026.

Step #1: Open Windows Defender Firewall

On your VPS, search for and open:
Windows Defender Firewall with Advanced Security
In the left sidebar, you’ll see options for Inbound Rules and Outbound Rules

Step #2: Whitelist Ports 6450

Go to Inbound Rules
Click New Rule → choose Port → click Next
Select TCP and enter:
```
6450
```
Select Allow the connection → click Next
Apply to all profiles (Domain, Private, Public)
Name the rule: ATAS Ports
Click Finish

Step #3: Outbound Rule (Ports)

Repeat the same steps above under Outbound Rules

→ Name the rule: ATAS Ports (Outbound)

Step #4: Whitelist ATAS IP Addresses (Inbound Rule)

Still under Inbound Rules, click New Rule
Select Custom, then click Next
Navigate to the Scope tab
- Under “Remote IP address,” select These IP addresses
- Click Add, and input each of the following IPs one by one:
```
51.178.130.10
142.132.201.231
65.21.32.251
135.181.115.236
```
Under Protocol and Ports, leave default (Any) → click Next
Under Action, select Allow the connection → click Next
Apply to all profiles → click Next
Name the rule: ATAS - Inbound IPs
Click Finish

Here is the matching Outbound Rule section for whitelisting ATAS IPs:

Step #5: Whitelist ATAS IP Addresses (Outbound Rule)

Go to Outbound Rules, click New Rule
Select Custom, then click Next
Go to the Scope tab
- Under “Remote IP address,” select These IP addresses
- Click Add, and enter each of the following IPs one by one:
```
51.178.130.10
142.132.201.231
65.21.32.251
135.181.115.236
```
Under Protocol and Ports, leave as default (Any) → click Next
Under Action, choose Allow the connection → click Next
Apply to all profiles → click Next
Name the rule: ATAS - Outbound IPs
Click Finish

Step #6: Confirm Rules Are Active

After adding the rules:

Open the Firewall rule list under Inbound and Outbound Rules.
Ensure the new rules are listed and enabled (green checkmarks).
Restart your platform and test connectivity to confirm improvements.

Pro Tip: Use This PowerShell Script to Automate the Entire Process

# ===============================
# ATAS Firewall Whitelist Script
# ===============================

# Run as Administrator

Write-Host "Creating Windows Firewall rules for ATAS..." -ForegroundColor Cyan

# --- Step 2: Inbound Port 6450 ---
New-NetFirewallRule -DisplayName "ATAS Port (Inbound)" `
    -Direction Inbound -Action Allow -Protocol TCP -LocalPort 6450 `
    -Profile Domain,Private,Public

# --- Step 3: Outbound Port 6450 ---
New-NetFirewallRule -DisplayName "ATAS Port (Outbound)" `
    -Direction Outbound -Action Allow -Protocol TCP -LocalPort 6450 `
    -Profile Domain,Private,Public

# --- Step 4 & 5: Whitelist ATAS IP (Inbound & Outbound) ---
$atasIPs = @(
    "51.178.130.10",
    "142.132.201.231",
    "65.21.32.251",
    "135.181.115.236"
)

foreach ($ip in $atasIPs) {
    # Inbound IP rule
    New-NetFirewallRule -DisplayName "ATAS - Inbound IP $ip" `
        -Direction Inbound -Action Allow -RemoteAddress $ip `
        -Profile Domain,Private,Public -Protocol Any

    # Outbound IP rule
    New-NetFirewallRule -DisplayName "ATAS - Outbound IP $ip" `
        -Direction Outbound -Action Allow -RemoteAddress $ip `
        -Profile Domain,Private,Public -Protocol Any
}

Write-Host "ATAS Firewall Rules have been successfully created." -ForegroundColor Green

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