求助~为什么streamyx开不到canon.com而用broadband又可以？

Example: Changing DNS server settings on Microsoft Windows 7

• Go the Control Panel.
• Click Network and Internet, then Network and Sharing Center, and click Change adapter settings.
• Select the connection for which you want to configure Google Public DNS. For example:
  • To change the settings for an Ethernet connection, right-click Local Area Connection, and click Properties.
  • To change the settings for a wireless connection, right-click Wireless Network Connection, and click Properties.
    
  If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
• Select the Networking tab. Under This connection uses the following items, select Internet Protocol Version 4 (TCP/IPv4) or Internet Protocol Version 6 (TCP/IPv6) and then click Properties.
• Click Advanced and select the DNS tab. If there are any DNS server IP addresses listed there, write them down for future reference, and remove them from this window.
• Click OK.
• Select Use the following DNS server addresses. If there are any IP addresses listed in the Preferred DNS server or Alternate DNS server, write them down for future reference.
• Replace those addresses with the IP addresses of the Google DNS servers:
  • For IPv4: 8.8.8.8 and/or 8.8.4.4.
  • For IPv6: 2001:4860:4860::8888 and/or 2001:4860:4860::8844
    
• Restart the connection you selected in step 3.