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.
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
4. Select Allow the connection → click Next
5. Apply to all profiles (Domain, Private, Public)
6. Name the rule: ATAS Ports
7. 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
5. Under Protocol and Ports, leave default (Any) → click Next
6. Under Action, select Allow the connection → click Next
7. Apply to all profiles → click Next
8. Name the rule:
ATAS - Inbound IPs
9. 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
4. Under Protocol and Ports, leave as default (Any) → click Next
5. Under Action, choose Allow the connection → click Next
6. Apply to all profiles → click Next
7. Name the rule:
ATAS - Outbound IPs
8. 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.