Eir customers experienced widespread broadband issues across the country today after a Domain Name System (DNS) outage. It is unclear as of yet whether the outage was a result of a malicious attack, or simply a fault on Eir’s end of things.
DNS is the Internet equivalent of a phonebook, translating domain names such as irishtech.ie to IP addresses. Computers use IP addresses to find other machines connected to the Internet.
A DNS outage means that your computer can still technically connect to the Internet, it just doesn’t know where to look for other machines that are also connected.
Eir has since fixed the issue, and affected customers should now be experiencing regular service.
The company has been forced to apologise to customers after it received a multitude of complaints from all corners of the country.
Fixes quickly emerged, but in case you missed them, we have a guide here for you, should something like this ever happen again.
For Android mobile users, go to settings, connections, Wi-Fi, then long press on the network you’re currently connected to. A small menu should come up, click “Manage network settings”, and enable “Show advanced options”. Change the IP settings from DHCP to Static. Finally, change DNS 1 to 220.127.116.11 and DNS 2 to 18.104.22.168
For Windows computer users, open control panel, click on Network and Internet, then Network and Sharing Centre. From here, select “Change adapter settings” on the left-hand menu. Right click on whichever network connection you want to modify, and choose Properties. Click on “Internet Protocol Version 4 (TCP/IPv4)”, then the properties button below it. Select “Use the following DNS server addresses”, and set Preferred DNS server to 22.214.171.124 and Alternative DNS Server to 126.96.36.199
An upshot of changing your DNS servers is that it also unblocks any blocked websites on your network, freeing up your ability to browse whatever you like on the Internet.