May 17, 2014 · Obviously, you will want to change eth0 to whatever your network card is called (hint: ifconfig) and change your dns-nameservers to whatever you want them to be. Now, if you want your DNS to come from your ISP then don't set any and it will work fine. Finally, restart your ethernet: $ service networking restart $ ifdown eth1 $ ifup eth1

Initially I thought it was because my ethernet port had a new name, eno1 instead of enp0s3. I tried changing the name in my setup above but I was still unable to get DNS resolved. I looked at my sudo lshw -C network output and saw that my NIC was listed as *-network: DISABLED. I found this forum that seemed to remedy that problem. But I was The problem might be related to your DNS cache, so flush it out. To flush the cache, type ipconfig /flushdns at a command prompt. Find out if your ISP is having DNS problems The curl binary that's built for Debian and Ubuntu doesn't contain support for libc-ares. That's because that library can't return both A (IPv4) and AAAA (IPv6) queries in a single response, so if the host you're connecting to uses IPv6 but you don't have IPv6 support, the connection just fails. May 17, 2020 · In other words, DNS used for associating a domain name (such as cyberciti.biz) to an IP address (such as 104.20.187.5 ). It just works like the “phone book” for the Internet by easily remember computer or server names into IP addresses. DNS uses TCP and UDP port number 53. open DNS port 53 using ufw for all. The syntax is: sudo ufw allow dns OR Dec 30, 2019 · Learn how to configure Uncomplicated Firewall (UFW) on Ubuntu 18.04 to ensure your system is protected! Ensuring stable firewall protection is the least you can do to protect your server.

Oct 07, 2017

The problem might be related to your DNS cache, so flush it out. To flush the cache, type ipconfig /flushdns at a command prompt. Find out if your ISP is having DNS problems The curl binary that's built for Debian and Ubuntu doesn't contain support for libc-ares. That's because that library can't return both A (IPv4) and AAAA (IPv6) queries in a single response, so if the host you're connecting to uses IPv6 but you don't have IPv6 support, the connection just fails.

Docker containers can’t resolve DNS on Ubuntu 14.04

How to set DNS Servers in Ubuntu 18.04 Linux