Configuring Router and Firewall Ports

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In some situations, disabling security software temporarily may provide a workaround for connectivity issues. For assistance, visit our Disabling Security Programs guide.

Most proxy servers, firewalls, and other Internet connection methods can restrict port access. Your configuration may be restricting packets from unknown sources. Make sure you have the following ports set up:
TCP PORTS UDP PORTS
Battle.net Desktop Application 80, 443, 1119 80, 443, 1119
Blizzard Downloader 1119, 1120, 3724, 4000, 6112, 6113, 6114 1119, 1120, 3724, 4000, 6112, 6113, 6114
Diablo 6112-6119 6112-6119
Diablo II 6112 and 4000 None
Diablo III 80, 1119 1119, 6120
Hearthstone 1119, 3724 1119, 3724
StarCraft 6112 6112
StarCraft II and Heroes of the Storm 1119, 6113, 1120, 80, and 3724 1119, 6113, 1120, 80, and 3724
Warcraft II Battle.net Edition 6112-6119 6112-6119
Warcraft III 6112 (Default) and 6113-6119 None
World of Warcraft 3724, 1119 3724, 1119

To configure a firewall for your operating system, select it below:

Windows XP Service Pack 3

Service Pack 3 is required to be installed to run Blizzard games on Windows XP. Follow the steps below to start the installation process:

  1. Click Start > Control Panel > Security Center > Windows Firewall.
  2. Under the General tab, be sure you have On (recommended) selected.
  3. Click the Exceptions tab.
  4. Click the Add Port... button.
  5. In the Add a Port dialog, add port 3724 as follows:
    Name: Blizzard Downloader
    Number: 3724
    Select TCP.
    Click OK. This will return you to the Exceptions tab.
  6. Click Add Port... to add another port.

Repeat the steps above for each port you need opened based on the above table. Your firewall should now allow traffic on the necessary ports for proper Blizzard Downloader operation.

Windows 7 and Windows 8

  1. Click the Start button and type Windows Firewall into the search field.
  2. Click Windows Firewall with Advanced Security.
  3. On the left frame, click Inbound Rules.
  4. On the right frame, click New Rule...
  5. Select the Port radio button and click Next.
  6. Select the TCP radio button.
  7. In the Specific Local Port field, enter 3724. Click Next.
  8. Select the Allow the connection radio button. Click Next.
  9. Make sure Domain, Public, and Private boxes are all checked. Click Next.
  10. Enter any name for this rule. Click Finish.

Repeat the steps above for each port you need opened based on the above table. Your firewall should now allow traffic on the necessary ports for proper Blizzard Downloader operation.

Windows 10

  1. Click Start .
  2. Type Firewall and press Enter.
  3. Click Advanced Settings.
  4. On the left frame, click Inbound Rules.
  5. On the right frame, click New Rule...
  6. Select the Port radio button and click Next.
  7. Select the TCP radio button.
  8. In the Specific Local Port field, enter 3724. Click Next.
  9. Select the Allow the connection radio button. Click Next.
  10. Make sure Domain, Public, and Private boxes are all checked. Click Next.
  11. Enter any name for this rule. Click Finish.

Repeat the steps above for each port you need opened based on the above table. Your firewall should now allow traffic on the necessary ports for proper Blizzard Downloader operation.

Mac OS X

The firewall in Mac OS X allows you to control connections on a per-application basis, rather than a per-port basis. This makes it easier to use firewall protection and prevent undesirable applications from taking control of network ports.

  1. From the Apple menu, choose System Preferences > Security.
  2. Click the Firewall tab.
  3. Unlock the pane by clicking the lock in the lower-left corner and entering the administrator username and password.
  4. Click Start to enable the firewall.
  5. Click Firewall Options to customize the firewall configuration.
  6. Check the Automatically allow signed software to receive incoming connections box.
  7. Click OK.

Blizzard does not directly support proxies, firewalls, or routers. For assistance configuring your router or firewall, contact your ISP or hardware manufacturer. PortForward.com is a useful third-party site that contains port forwarding walkthroughs for most router models.

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