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Recommended DNS Setting

ECN is recommending the following DNS server settings to take advantage of OpenDNS, a Cisco product that add security protections from various forms of Malware, Botnet, Phishing, Torrents, and will able to monitor connected devices for on-going malicious activity. End users will receive a web page redirection when clicking on a known malicious e-mail or web link.

Any connected devices to a Purdue University wired network, such as Computers, Laptops and Printers, and the devices are not using automatic configuration (DHCP), check the network settings and update to use the following two DNS servers: 

  • ( 
  • ( 

If there are other IP addresses in the DNS settings, such as ‘’ (, remove those entries. The result should be two DNS servers, only. 

  • To access the network settings for Windows computers, use the start menu: Window Settings > Network and Internet > Ethernet > Change adapter options > Ethernet > Properties, then select ‘Internet Protocol 4’ and click on ‘Properties’. 
  • To access the network settings for Macintosh computers, use the menu: Apple Menu > System Preferences > Internet & Networks > Network, then select ‘Ethernet’ on the left side. 
  • To access the network settings for Linux systems, depending on the flavor of Linux, check the network settings with ‘Network Manager’ or ‘Net Plan’. 
  • For other devices, such as printers, scanners, cameras, etc., consult the device’s documentation for DNS configuration settings. 

If the connected devices are using automatic configuration (DHCP), or the connected device is maintained by ECN, no changes will be needed.

Update schedule

ECN is scheduling DNS changes, to match the recommendations, for automatic configuration (DHCP) and ECN maintained hosts on the following dates: 

  • Wednesday, May 8, 2019: All hosts using Automatic Configuration (DHCP). 
  • Tuesday, May 14, 2019: All ECN supported Linux, Windows and Macintosh hosts. 
  • Monday, June 3, 2019: Periodic notifications to remaining users of self-maintained hosts. 

All changes are expected to be completed by Thursday, August 1, 2019. 

Last Modified: Apr 18, 2019 3:03 pm America/New_York
Created: Apr 18, 2019 2:57 pm GMT-4 by admin