If you experience internet connectivity problems, such as trouble using the Wolfram System's integrated data functions, try following the troubleshooting techniques described below.

Open the Help ▶ Internet & Mail Settings… dialog and use the Test Internet Connectivity button. Make sure that the box marked Allow the Wolfram System to access the Internet is checked.

If the test succeeds, then the Wolfram System is correctly configured for internet access, and the problem lies elsewhere, such as a problem with your network configuration.

If the test fails, note how long it took. If there was a minutes-long delay, skip to "Check Your Proxy Settings" for troubleshooting information.

If your web browser does not work, there might be a network problem. To test whether your browser works, make sure to load an uncached page, or use Shift+Reload to force-reload a cached page.

The Wolfram System's proxy settings are configured in the Internet Connectivity dialog.

By default, the Wolfram System will attempt to use system proxy settings, if your operating system has them, using the setting Use Proxy Settings from My System or Browser in the Proxy Settings section of the Internet Connectivity dialog (Help ▶ Internet Connectivity).

If you are experiencing connectivity problems, it is possible that your system has incorrect proxy information or that you do not use a proxy to access the internet. To test this, select the setting Direct Connection to the Internet.

Alternatively, try copying the proxy settings from your web browser into the Wolfram System. The HTTP proxy setting should be sufficient in most cases.

On Windows, the Wolfram System will by default use the proxy settings found in Windows under Control Panel ▶ Internet Options ▶ Connections. These are the same proxy settings used by Internet Explorer.

For Windows Firefox users, proxy settings are found in Tools ▶ Options. Click Advanced at the top, and then click the Network tab that appears below. Click the Settings button in the Connections section, and a proxy settings window will appear.

On Mac OS X, proxy settings are configured in the Network Preferences panel.

If you are using Windows, try unchecking the Use same proxy server for all protocols checkbox in the Proxy Settings dialog under Control Panel ▶ Internet Options ▶ Connections and then clicking the Advanced button in the Proxy Settings section.

If the Test Network Connectivity button (described in "Test Internet Connectivity") fails after a minutes-long delay, an incorrect SOCKS proxy configuration is likely to be the problem. The Wolfram System does not require a SOCKS proxy, but will attempt to use one if the SOCKS proxy information is available.

Certain firewall configurations could cause internet connectivity problems in the Wolfram System. Temporarily turn off the firewall to see if that fixes the problem.

If so, configure the firewall to allow the Java Runtime Environment in the Wolfram System layout to use the internet. The Wolfram System connects to the internet using the standard HTTP port, port 80.

For more information about the Wolfram System's connectivity capabilities, see "Internet Connectivity".

If the information in this document does not help you resolve your connectivity problems, consult the Wolfram Research Technical Support troubleshooting guide at support.wolfram.com/12420.