Off-campus computers or routers that have been specifically configured to use SCS caching name servers will no longer be able to perform DNS lookups when not located on the Carnegie Mellon network.
Use the instructions below for the appropriate operating system to confirm whether you will be impacted by this change.
The SCS caching nameserver IP addresses to look for start with128.2.
Please follow the instructions for the appropriate operating system below. You can also submit a ticket for assistance.
Check DNS Settings in Windows
- Open the Control Panel by clicking on the Windows button, then clickControl Panel
- Type "Network and Sharing" in the upper right hand corner and click onNetwork and Sharing Center
- ClickChange Adapter Settings
- Right click on the network adapter you'd like to check (wired or wireless) and clickProperties
- SelectInternet Protocol Version 4 (TCP/IPv4)and clickProperties
- Make sure you do not have the SCS DNS entries listed underUse the following DNS server addresses
- Instead, selectObtain DNS server address automatically
Check DNS Settings in macOS
- Open System Preferences, either from the Dock or the Apple menu > System Preferences
- ClickShow All
- ClickNetwork
Note:If the lock in the lower-left corner of the window is closed, you must click it and enter your Mac OS X administrator password before you can make changes to settings.
- In the left-hand pane, choose the network connection you want to check
- Select theAdvancedbutton and theDNStab
- If you have manually entered settings, the SCS DNS servers will be listed in black font. If this is the case, use the minus ( - ) button to remove them If you're on campus and the DNS servers appear in gray font, that means they are automatically assigned. When you leave the Carnegie Mellon campus, your DNS settings will be updated to your local network provider and you will not be affected by the DNS update.
Check DNS Settings in Debian & Ubuntu
- Select the Network icon in the top panel
- SelectEdit Connections
- Choose the network connection you want to check
- ClickEdit
- Select theIPv4 Settingstab
- Make sure you do not have the SCS DNS entries listed underDNS servers
- Instead, set theMethodtoAutomatic (DHCP)and clickSave
Check DNS Settings in Fedora & RHEL
- Right-click the Network icon in the top panel
- SelectEdit Connections
- Choose the network connection you want to check
- ClickEdit
- Select theIPv4 Settingstab
- Make sure you do not have the SCS DNS entries listed underDNS servers
- Instead, set theMethodtoAutomatic (DHCP)and clickSave
FAQs
MacOS. DNS settings are specified in the Network window. Click the Apple menu > System Preferences > Network. If the lock icon in the lower left-hand corner of the window is locked, click the icon to make changes, and when prompted to authenticate, enter your password.
How do I check my DNS server settings? ›
How to find your DNS server on Android
- Open “Settings.”
- Tap “Wireless & networks” or “Network & internet.”
- Tap on “Wi-Fi.”
- Tap and hold on to the Wi-Fi connection you're currently connected to.
- Tap on “Advanced” to see the DNS server information.
MacOS. DNS settings are specified in the Network window. Click the Apple menu > System Preferences > Network. If the lock icon in the lower left-hand corner of the window is locked, click the icon to make changes, and when prompted to authenticate, enter your password.
How to check DNS from IP address? ›
Follow these steps to do it right:
- Open the command prompt.
- Type nslookup followed by the IP address and press 'Enter. ' For example, it can be nslookup 8.8. 8.8.
- Now, the command prompt will return the DNS name and the associated IP you entered.
Open a DOS window on any Windows client PC and type ipconfig /all. That will tell you what DNS and DHCP server it's using. You can have one, two, or many servers providing DNS.
How do I check my DNS server connection? ›
Here's how to check DNS settings in Windows and see if your DNS is working: Open the Command Prompt. Type ipconfig /all and press Enter. Look for the DNS Servers entry to check your DNS settings and verify that they are correct.
How to check if DNS is working properly? ›
Run ipconfig /all at a command prompt, and verify the IP address, subnet mask, and default gateway. Check whether the DNS server is authoritative for the name that is being looked up. If so, see Checking for problems with authoritative data.
How to check DNS settings Command Prompt? ›
To see your current DNS settings, type ipconfig /displaydns and press Enter. To delete the entries, type ipconfig /flushdns and press Enter. To see your DNS settings again, type ipconfig /displaydns and press Enter. You should see blank records or you might get the message "Could not display the DNS Resolver Cache."
How do you find your DNS IP and MAC addresses? ›
In your computer's search bar, type cmd and press Enter. In the Command Prompt window, type ipconfig/all and press Enter. Locate the Ethernet adapter Ethernet section. The Physical Address is your computer's MAC address and the IPv4 Address is your computer's IP address.
What should my DNS settings be? ›
What are the best DNS servers to use?
- Cloudflare. Primary DNS (preferred DNS): 1.1.1.1. ...
- Google Public DNS. Primary DNS (preferred DNS): 8.8.8.8. ...
- Quad9. Primary DNS (preferred DNS): 208.67.222.222. ...
- NextDNS. Primary DNS (preferred DNS): 45.90.28.190. ...
- NordVPN. Primary DNS (preferred DNS): 103.86.96.100.
Additionally, Microsoft Windows has nslookup, a built-in command-line tool for checking DNS records. To access nslookup, open a command prompt window by opening the Windows Start Menu or pressing the Windows key on your keyboard. Then, just type “nslookup” while the Start Menu is open.
How do I find all DNS records for an IP address? ›
Checking DNS records using the command line
The most efficient way to check DNS records of the domain is to use a terminal with the command nslookup. This command will run on almost all operating systems (Windows, Linux, and macOS).
How to use DNS lookup command? ›
Use the command nslookup (this stands for Name Server Lookup) followed by the domain name or IP address you want to trace. Press enter. This command will simply query the Name Service for information about the specified IP address or domain name.
How to check DNS settings on Mac? ›
In System Settings, click on Network on the left-hand side of the window. Select the first Wi-Fi or Ethernet connection in the list, the one you are connected to. Next, click on the Details button. Go to DNS.
How do I check DNS settings? ›
Type Command Prompt into the Start menu, then select Run as Administrator from the right pane. Ipconfig /all should be entered into the Command Prompt window. The information displayed on the screen includes the DNS servers.
How do I find my DNS server and IP address? ›
Private address
- Open the Settings app.
- Select Wi-Fi in the list of options.
- Select the info icon (ⓘ) next to the name of the wireless network.
- Locate the Wi-Fi Address field. ...
- Locate your IP Address. ...
- Other network information, such as your Domain Name Servers (DNS) can also be found on this screen.
Windows
- Go to the Control Panel.
- Click Network and Internet > Network and Sharing Center > Change adapter settings.
- Select the connection for which you want to configure Google Public DNS. ...
- Select the Networking tab. ...
- Click Advanced and select the DNS tab. ...
- Click OK.
- Select Use the following DNS server addresses.
What are the best DNS servers to use?
- Cloudflare. Primary DNS (preferred DNS): 1.1.1.1. ...
- Google Public DNS. Primary DNS (preferred DNS): 8.8.8.8. ...
- Quad9. Primary DNS (preferred DNS): 208.67.222.222. ...
- NextDNS. Primary DNS (preferred DNS): 45.90.28.190. ...
- NordVPN. Primary DNS (preferred DNS): 103.86.96.100.
Find your DNS hosting provider
- On the InterNIC search page , in the Whois Search box, type your domain. For example, yahoo.com.
- Select the Domain option, and then click Submit.
- On the Whois Search Results page, locate the first Name Server entry.
The Domain Name System (DNS) is a hierarchical naming system that allows communication across devices on a network. Most commonly, it translates human-readable domain names (like bluecatnetworks.com) to computer-friendly Internet Protocol (IP) addresses (like 104.239. 197.100).
