Questions tagged [dns]

Domain Name System for computers, services, or any resource connected to the Internet. It translates domain names meaningful to humans into the numerical identifiers associated with networking equipment for the purpose of locating and addressing these devices worldwide.

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Unble to access the internet after restarting device

I'm using Ubuntu 20.04. Due to some circumstances which I don't remember I had to switch from gdm3 to lightdm. From then on, after restarting my device, even though it get's connected to the Wi-Fi, I ...
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Why is Ubuntu 20.04.3 internet access not working?

My Ubuntu OS is connected to the my working internet network, but any internet-reliant services have not been functioning properly. This includes downloading anything (including any packages from the ...
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Cannot access my localhost from any IP address while localhost and 127.0.0.1 can

I am very tired because after completing the web application, I can access it through 127.0.0.1 only. I have a VMware machine with Ubuntu 20.04 IP Address ens33: flags=4163<UP,BROADCAST,RUNNING,...
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Installing LetsEncrypt on localhost via Synology DNS server

For developing websites I have setup a few virtual Ubuntu machines. Every machine has its own local IP address with incremental last number (192.168.2.10, 192.168.2.11 etc.) To access the webserver, I ...
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impossible to repair/reinstall resolve.conf

the link of my /etc/resolve.conf is broken (screen resolve.conf missing), i try to reinstall it but i cant (error when i try to reinstall it) i also try to install it by using wget but my dns missing ...
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Can ping and resolve DNS, but no internet access

I have Ubuntu 20.04 on a VPS. Just two days ago, i was wondering why both my websites went offline (Cloudflare gives error 522). Upon SSHing into it I immediately figured out some weird issue that ...
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Impossible to create an email address from the postfix admin [closed]

Good morning, I am doing a year-end project which consists in creating a postfix mail server, I arrived at the creation of emails except that when I want to create an impossble mail addendum I have ...
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docker buildx create --use mybuilder => Temporary failure in name resolution

Creating a builder $ docker buildx create --use mybuilder romantic_galileo Observing the "Temporary Failure in Name resolution" error: $ docker buildx ls NAME/NODE DRIVER/...
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how to connect cloudflared and adguardhome (custom dns resolver)?

How do I make {cloudflare-warp, cloudflared} on one side and adguardhome on the other? adguardhome works instead of resolvd. so i have systemd-resolved muted by design. signs of a problem: status bar ...
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DNS blackout issue in Ubuntu 22.04

I've been using Ubuntu 16, 18 and then 20 for many years with the same ISP. Recently, I bought a new machine and had to update to Ubuntu 22 as the WiFi drivers were not available on earlier versions. ...
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New User needs help removing root kit virus

I clicked on a PUP pretending to be Norton and then subsequently installed Malware/Trojan. This virus overwrites the firmware of your router and redirects your DNS (doing a hardware reset does not ...
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wifi fails at and only at whole foods! What could possibly be the issues?

I can't seem to connect to wifi on my ubuntu at Whole Foods (2 separate locations)! Note I have tried 10.0.0.1 to prompt for the captive portal, and I tried getting the default gateway by running ...
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How do I flush DNS cache in Ubuntu 22.04 LTS?

I've already tried sudo systemd-resolve --flush-caches but it ends up showing sudo: systemd-resolve: command not found. So, how do I flush the DNS cache in Ubuntu 22?
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DNS resolver keeps breaking

Every now and then, I'll try to ssh to something on my local network and I'll get: ssh: Could not resolve hostname pacman: No address associated with hostname As soon as I restart the DNS resolver ...
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wrong DNS resolution

I have 2 servers with similar configuration but one of them give me different result from a nslookup command The first one is working correctly and here is the answer I have: Server: 8.8.8.8 ...
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Stop 'localhost' resolving to old domain name? (or, how to change 'live' wordpress site back to local?)

I had a wordpress site running on an Ubuntu 18.04 linux server. The server died (motherboard issue) and I've since been able to take the hard drive out and boot from it on a different computer. My ...
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Network problems, probably wrong configuration

My provider had some problems. They fixed the problems on their side, but I got problems on my side now. The Internet is not working showing the "wrong IP assigned" error. My first thought ...
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IPv6 DNS Problem with archive.ubuntu.com

Since a couple of weeks my mirror sync doesn't work as expected. I think that I identified the problem now. On my server the address archive.ubuntu.com resolves to a couple of IPv6 addresses and at ...
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Top Level Domain Will Not Load, Only Subdomains Will Load

I have posted about this problem before and temporarily though that I solved it but updating my dns server via dnsmasq, but that solution seems to have simply stopped working. Problem. example.com ...
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systemd-resolved does not resolve dns names

So long as I had a single interface up getting its IP from a DHCP server things were working fine. I then connected a second interface and statically configured an IP address on it. Now dns resolution ...
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Internet DNS problems - Changing DNS doesn't seem to work

I'm on Ubuntu 22.04 LTS, connecting works fine on my home network but never properly connects on my school's network which utilizes MSCHAPv2. Using ping with an IP address works fine, but using "...
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DHCP-provided DNS Server with wrong route in Ubuntu Server 22.04

On fresh install of Ubuntu Server 22.04 (ubuntu-22.04-live-server-amd64.iso) on my network, I can not use the DHCP-Provided DNS Servers which are a on a different subnet : routes to that subnet are ...
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Ubuntu 21.10 VPN disconnection does not revert back to original DNS server in /etc/resolv.conf

When I disconnect from my company's VPN in Ubuntu 21.10 (using Gnome GUI for VPN connect/disconnect), I do not have previous DNS server entries in /etc/resolv.conf. Can anybody help sorting this issue ...
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DNS Errors after sudo apt update

today I used sudo apt update command and I started to get dns errors. Website takes forever to load, connecting to archive ubuntu takes a lot of time. This issue is really annoying because I often get ...
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What is my NS ip address . Is it my ISP DNS address?

Im setting up a static ip address in Ubuntu 20.04 and all is fine until i edit the name servers IP addresses in the configuration file. Is it the address of my router? Thank you.
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DNS_PROBE_FINISHED_NOINTERNET

About 2 weeks ago I decided to move to Ubuntu instead of Windows 10. After that problems in network appeared, suddenly the web page show 'DNS_PROBE_STARTED' then it changes to '...
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ssh host command fails after editing config to reflect a change in the domain name

I have been able to ssh to server with the help of the following entry in config file. Host hcp Hostname hcp.domain.xyz User ubuntu Identityfile c:/...... I then acquire a new domain with the domain....
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Bind9 Server with internal and external Zones

named.conf.local // // Do any local configuration here // // Consider adding the 1918 zones here, if they are not used in your // organization //include "/etc/bind/zones.rfc1918"; // Just ...
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Bind9 - dig example.com not showing the private IP address

I have installed Ubuntu 20 and installed the bind9. 'DNS : ns1.example.com' 'IP: 10.201.1.253' Created a zone files ; ; BIND data file for local loopback interface ; $TTL 604800 @ IN SOA ns1....
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Asus Zephyrus G15 2021 with MT7921 WiFi Card: very slow internet via WiFi

Speedtest results show good results, as it is supposed to be user@laptop:~$ speedtest-cli Retrieving speedtest.net configuration... Testing from <redacted>... Retrieving speedtest.net server ...
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Connected to wifi, no ping to router

I have Ubuntu 20.04.4 LTS x86_64 installed in a Dell Inspiron 15 5000. Everything was fine, until recently that I booted it up. It had no battery so it turned off while booting. After that, I can’t ...
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Ubuntun 22.04: when connected with NetworkManager OpenVPN, DNS doesn't use the VPN DNS server

I am running Ubuntu 22.04 I have an OpenVPN to my company via NetworkManager in gnome. Most of the interal systems work, but for example portal.azure.com has 2 DNS records, a public and private zone ...
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DNS doesn't work for mobile broadband (22.04 LTS)

While I can connect to mobile broadband with Ubuntu 22.04 and I can transmit packets (ping 8.8.8.8 works fine), DNS resolution doesn't work. The result is that I can't use the internet connection. ...
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Is there a way of configuring 2 or more web domains for only 1 DNS server?

I´m now creating 2 websites on Apache2 web server (Ubuntu 20.04 based) and they both have different domains (domain1.com and domain2.com for this example). Webpages are hosted on /var/www/domain1 and /...
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How to set DNS on Ubuntu 22.04 when you have no netplan config

I upgraded a 16.04 Ubuntu server to 22.04. Migration to 18.04 & 20.04 worked well. The upgrade to 22.04 broke my DNS config. I found a lot of tutorials to configure the whole network using netplan ...
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How to fix SAMBA-AD-DC DNS Problems

i set up 2 samba ad dcs on Ubuntu Server 21.10 in a heterogen envoirement and came across some errors trying to remote backup DB of DC01 to DC02 via Samba-Tool. I hit up the mailing list and ended up ...
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Incredibly slow and intermitting internet connection on a private network with custom DNS Ubuntu 20.04

I am experiencing a very weird phenomenon on a Lenovo Thinkpad E15 with Ubuntu 20.04, specs: .-/+oossssoo+/-. pc@user `:+ssssssssssssssssss+:` -------------...
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Hostnames cannot be resolved after upgrading to 22.04

After upgrading ubuntu from 21.10 to 22.04, my internet connection does not work anymore. I am connected to the WLAN and I can ping IP addresses (from the local network as well as from the internet) - ...
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Getting a new router broke my internet on my Ubuntu Server 20.04

Today, my internet modem and router was replaced with a new unit. Everything else in my house worked, except for my Ubuntu Linux 20.04 LTS server. I am able to remote into it, and it can see my local ...
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Any issues with disabling local DNS Cache on Ubuntu Server 18.04 or 20.04 or 22.04

My Ubuntu 18.04 server is used to create websites and initiate SSL's via an Admin panel. The issue is that when I initiate the SSL I like to have the server check the DNS record, but since the client ...
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Wifi connected but can't reach internet

I've using ubuntu for a while, but last night its getting freeze and I have to force shutdown using power button. After that my wifi still normal and i can do ping, but it cannot reach internet. Its ...
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ubuntu 18.04+ not checking /etc/hosts why does etc hosts updates no longer work? How to update /etc/hosts

Why does updating /etc/hosts no longer work? How can I debug and get it to work? cat /etc/hosts: 127.0.0.1 localhost ::1 localhost # I added this line 127.0.0.1 kakfa cat /etc/nsswitch.conf: ...
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Temporary name resolution failure

I am running Ubuntu 21.10 on a laptop computer. Clean install worked fine. ran apt-get update && apt_get upgrade. Now network is all "temporary failure in name resolution'. Every ...
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Creating nameservers via BIND9

So I have a VPS and I need to create nameservers that I can use with my domain registrar to have my domain viewable. I am on Ubuntu 20.04 and I am accessing ssh via putty. This is what I have done: ...
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how to clear DNS cache in 22.04?

How is the DNS cache cleared in 22.04? The method that worked in 20.04: systemd-resolve --flush-caches no longer works.
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failure to resolve DNS query using IPv6, e.g. host -6 gnu.org, dig -6 gnu.org

Why doesn't the default Ubuntu LTS install allow host -6 gnu.org or dig -6 gnu.org to work? Welcome to Ubuntu 22.04 LTS (GNU/Linux 5.15.0-27-generic x86_64) $ host -6 gnu.org ;; communications error ...
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Ubuntu 20.04 internet connection problems

I have internet connection but cannot access internet dut to dns configuration. how to fix it? problems started yesterday. I have executed: sudo service network-manager restart restarted router etc. ...
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resolv.conf file errors [duplicate]

I'm very new to Ubuntu (20.4.4) and for a few days now I can't connect to the internet. Well, I can get a WIFI connection, but there's no internet. After digging I think I traced it back to my resolv....
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How to fix WSL domain resolution

so I was having issues with domain resolution with WSL whenever I use the VPN. I would get this: ping: google.com: Temporary failure in name resolution I tried following instructions from these ...
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How to make KVM guest forget IP address deleted from /etc/hosts?

In my workstation I run a KVM hypervisor containing: a guest VM running Xubuntu as my developer environment. a guest VM running Ubuntu server as my development target. I set the IP address of the ...
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