You can access WFS, WMS, and tile servers that require basic authentication using the built-in standard mechanism for Internet servers. To connect to a web service that requires authentication, complete the Connect dialog box that displays.
Enter the appropriate user name and password and select the Remember my password check box to have the site "remember" your password for you. Click OK to enter the site. If you do not have a valid user name and password, you cannot connect to the site.