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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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13 views

Netplan configuration doesn't seem to be taking effect

After configuring a static ip address in /etc/netplan/01-network-manager-all.yaml for my wlan interface, the ip address nor the dns changed. I used sudo netplan generate and sudo netplan apply, but ...
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15 views

Register hostname in active directory DNS in 18.04

I'm on ubuntu 18.04 which is part of an active directory domain using sssd. How can get my ubuntu to register its hostnmae to the dns server. I saw How to get Ubuntu Host to Register Hostname With ...
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0answers
17 views

Public WIFI stops working after sometime in Ubuntu 18.04 LTS

A question mark appears over the WIFI symbol, as wifi(?), after sometime while connected to the College WIFI.
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16 views

Apache2 external access issues

i am very much stuck on apache2 configuration. Reaching the web server internally works just fine, both with DNS and the servers local IP (with http://) but externally its a no go. I have added the ...
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1answer
90 views

DNS not working after reboot

After booting the Ubuntu 18.10 I can't resolve domain names and my /etc/resolv.conf file is looking like this: # Generated by NetworkManager nameserver 127.0.0.53 The $ nslookup google.com - 127.0.0....
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1answer
15 views

DNS Redirection issue

Well, I am lost... I was trying to transfer my WordPress server (on Ubuntu 18.04) from Azure to AWS. I used ManageWP to do this, but had issues with logging in. So I created a new blank WordPress ...
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0answers
31 views

16.04 - random Temporary failure in name resolution

So I got new laptop with Ubuntu 16.04 preinstalled. After logging in, I just ran all suggested updates. Everything was running fine, but I noticed that sometimes when I need to access some remote ...
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0answers
15 views

Cannot loggin twice in ssh if DNS tunnel is active

I recently installed WireGuard so I can tunnel DNS request to the VPN. I also have portsentry and fail2ban but now I disabled them until I find the solution to the problem. When I login into my user ...
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1answer
30 views

resolv.conf take a localhost as DNS

When read /etc/resolv.conf: me@alpha:~$ cat /etc/resolv.conf | tail -3 # operation for /etc/resolv.conf. nameserver ...
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1answer
29 views

Set up secure DNS (over TLS or HTTPS) on 16.04

How do I set up Secure DNS (eg over TLS or HTTPS) on 16.04? I would prefer to use functionality built into 16.04 or apps available on the 16.04 repository. I plan to use either the Google Public DNS (...
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1answer
21 views

bind9 slave error on transfer: dumping master file: /etc/bind/zones… open: permission denied

BIND 9.11.4-3 Ubuntu 18.10 The error is seen in the journal after the following which seems to indicate success, though there is an apparmor error which I don't understand Lines are ordered with ...
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0answers
17 views

Port Forwarding when using android tethering

I am using Android tethering to connect my desktop to internet. I would like to use DuckDNS but can't figure out how to forward port since there is no router
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29 views

How to fix temporary failure in name resolution; connection reset

I develop on a machine with Ubuntu 16.04 and for the past couple of weeks I've been getting a connection reset error whenever I try to access Pypi through the browser: ERR_CONNECTION_RESET. I ping'ed ...
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0answers
22 views

Ubuntu 18.04 client not using dnsmasq on remote Ubuntu 18.04 Server

I have 2 machines running Ubuntu 18.04.1: Laptop with Ubuntu Desktop (192.168.1.6) Server with Ubuntu Server (192.168.1.8) I have installed dnsmasq on the Server and it looks like dnsmasq is loading ...
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1answer
43 views

Why can I successfully ping stats.nba.com and not stats.nba.com/stats

Very new to Unix and experimenting with a Digital Ocean droplet. Why can I successfully ping stats.nba.com whereas ping stats.nba.com results in ping: unknown host stats.nba.com/stats
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2answers
46 views

Ubuntu 18.04 server unable to ping websites but can ping IP addresses

Total newbie here, got fed up with Windows world and gone over to the dark side Yesterday I installed Ubuntu 18.4 LTS on VirtualBox with bridge connections. It seems I can ping IP addresses ...
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0answers
9 views

Ubuntu Opsi Server: urlopen error timed out (Opsi package installation)

Currently I'm in trouble with a networking issue, the "urlopen error timed out". I had recently troubles with contacting the servers at archive.ubuntu.com, but finally I fixed it by re-generating the ...
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1answer
21 views

Connection a domain with my vps server

I'm a college student and I develop web applications for some extra cash. I did my last project using combination of RoR/Puma and Ngnix on Ubuntu 14.04. The app is running fine on its IP address (...
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43 views

Ubuntu 18.04 systemd-resolve doesn't read the /etc/resolv.conf properly

I faced a strange issue with my Ubuntu 18.04. I use openfortivpn to connect to my company resources and it worked OK. I also use openvpn to connect to some different resources as well, sometimes even ...
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0answers
27 views

error: ** server can't find xx.xx.xxx.xxx.in-addr.arpa: REFUSED

I am preparing my DNS configuration. When I checked: nslookup [dns name] it shows an error: error: ** server can't find xx.xx.xxx.xxx.in-addr.arpa: REFUSED Where did I do wrong?
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2answers
61 views

How does Command substitution, dig and +short work within this script?

Could someone please explain how dig and +short work within this script and why they are used? Also could someone explain how the command substitution works within the code as I am struggling to ...
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0answers
31 views

Can't reach gateway

Ubuntu 18.04 VM on Hyper-V Windows 2016. No internet access. Can ping other clients on my network but cannot ping my router/Gateway. The router is performing the DHCP services. ping "gateway" 31 ...
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1answer
39 views

how to reset DNS settings to the defaults?

while I'm learning the DNS, I have installed too many apps such as BIND and DNSmasq and made some changes to /etc/resolve.conf and now I would like to reset the DNS settings to defaults? I have ...
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31 views

Checking the proxy, firewall,and DNS configuration ubuntu 18.04

Checking the proxy, firewall,and DNS configuration ubuntu 18.04 How do you see this problem and I hope you support I installed the system more than once four times and the same problem exists I hope ...
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1answer
447 views

Since Ubunutu 18, why doesn't openvpn's client.ovpn:“dhcp-option DNS xxx.xxx.xxx.xxx” configure /etc/resolv.conf?

I'm trying to setup an openvpn client with Ubuntu 18. I run these magic steps: $ sudo apt-get install openvpn $ sudo apt-get install openvpn-systemd-resolved $ sudo openvpn --client --config ./...
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1answer
21 views

Bind9 on Ubuntu (proof of concept question)

I want to set up Bind9 as a local DNS. Its function would be: Allow a local-network Wiki and blog to have their own URLs. Forward other requests to a pair of external DNS servers. Is this viable ...
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1answer
45 views

Name resolution works with host but fails otherwise

Ubuntu bash on Windows 10 I have an issue where the host and nslookup commands resolve all hosts just fine but all other commands fail domain resolution. See below: user@computer:/mnt/c/Users/user$ ...
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1answer
75 views

Samba Internal DNS - Systemd resolve safe to disable?

So I had a Ubuntu 16.04 instance running a samba ad dc, I upgraded to 18.04 and when starting samba I was getting the error; [2018/12/27 11:09:56.483755, 0] ../source4/dsdb/dns/dns_update.c:290(...
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1answer
146 views

Ubuntu 16.04 internet not working but SSH works after upgrade

I just upgraded from 14.04 to 16.04 but now the internet does not work. I am able to SSH into the box. I can ping 8.8.8.8 I have tried sudo dpkg-reconfigure resolvconf and sudo reboot but that didn'...
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2answers
149 views

How do I change my DNS on Ubuntu 18.04? Which DNS should I use?

I'm recently interested in DNS for a cleaner, faster & more secure Internet surfing. In my country many websites are obscured and I was told that changing DNS may allow me to use them as I did ...
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0answers
45 views

Local cURL Not Working on www Subdomain, Ubuntu 18.04, GCE

I have a VPS on GCE running WordPress and Nginx under Ubuntu 18.04. When I $ curl -v majlovesreg.one it returns okay. But when I add www, $ curl -v www.majlovesreg.one within the server it throws ...
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67 views

How can I set up OpenDNS on Ubuntu 18.04.1?

OpenDNS recommends a set of terminal commands in order to set it up on an Ubuntu computer. The problem is that the commands gksudo and supersede don't work on Ubuntu 18.04.1. Here on OpenDNS support ...
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2answers
55 views

Can no longer send mail. Suspecting /etc/resolv.conf shenanigans

Alerts are now down so would like to fix this properly: delivery temporarily suspended: Host or domain name not found. Name service error for name=gmail.com type=MX: Host not found, try again I have ...
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1answer
29 views

DNS resolution requires wireless link?

I have a Lenovo Thinkpad X220 running Ubuntu 18.04. It has an Ethernet port and a wireless card. So far as networking goes, everything was automatically configured using defaults during installation. ...
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0answers
85 views

Extremely slow boot up - Ubuntu 18.04.1 LTS

I'm running: LSB Version: core-9.20170808ubuntu1-noarch:printing-9.20170808ubuntu1-noarch:security-9.20170808ubuntu1-noarch Distributor ID: Ubuntu Description: Ubuntu 18.04.1 LTS Release: 18....
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1answer
49 views

bind9-dyndb-ldap, BIND, named.conf: “cannot parse settings” during service start

I've installed LDAP, BIND9 and Bind9-dyndb-ldap on 18.04 server. Added the BIND schema to LDAP; added a zone and a few server dns entries to LDAP. Added the "dyndb" section to the named.conf, ...
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1answer
61 views

Postfix using gmail relay without a domain name gets dns error

When I send mails using sendmail or mutt, /var/log/mail.log shows that emails get delivered to smtp.gmail.com. I can actually see the email appearing in my Gmail outbox. However, I receive an error ...
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417 views

“Could not resolve it.archive.ubuntu.com”

After a broken install (GParted) on my 18.04 LTS I've first tried sudo apt --fix-broken install and sudo apt-get update In both cases, I got an error message saying that Impossibile risolvere "it....
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0answers
19 views

juju MAAS machines dns-name ip address

Is there a way to pick a DNS A record for machines added using juju machine or annotations that can be used in bundle? For example, I need "dns-name: 10.146.x.x" instead of "dnsname: 10.127.0.1". ...
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1answer
35 views

Fail to point my domain through the resolv.conf file

I'm trying to connect my domain with my Ubuntu 18.04 server through the resolv.conf file. I add the domain on cloudflare (it is already active) I create an A record to point the server IP and then I ...
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0answers
52 views

How to change DNS server in Ubuntu 16.04 server? (designated method does not work)

I need to change the DNS settings in an Ubuntu 16.04 LTS server. I edited the /etc/network/interfaces file (as per this answer) and changed the dns-nameservers to the correct DNS server addresses. ...
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1answer
35 views

Domains resolving to public IP instead of local IP with BIND

I managed to setup bind on my local network in order to resolve domains to the local IP of my server instead of my public IP. However it only works on other clients in the network, but not from the ...
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1answer
63 views

Client can't connect to a DNS server (NXDOMAIN)

I'm an IT student working in VirtualBox. I managed to set up a DNS server that seems to work: Server: 127.0.0.1 Address: 127.0.0.1#53 Name: srv-01.lab.loc Address: 192.168.1.1 Now I need to check ...
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1answer
73 views

nmcli connection verification failed

I'll paste the sequence of commands I'm trying to run to configure desktop Ubuntu 18.04 NetworkManager according to the answer in this SO question. When I perform the steps in the answer I end up with ...
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0answers
197 views

I can ping my host domain/8.8.8.8 but can't ping google: name resolution failure

I think I configured the bind dns server correctly on my ubuntu 18.04 server on my virtual network. I can ping my other server ' www.boblowlaw.com ' just fine and I can also ping 8.8.8.8 and I get ...
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2answers
799 views

18.04 Unable to connect to server due to “Temporary failure in name resolution”

I am at a bit of a loss. I am able to perform an nslookup and a dig on the address "imap.comcast.net" but if I try to ping it or connect to it from my application I get a "Temporary failure in name ...
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0answers
73 views

Ubuntu 18.04 not resolving dns?

I recently updated from 16 to 18, since when I have not been able to connect to the internet. It's a desktop machine without a wireless adapter. Firefox can't connect to any website. If I open a ...
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0answers
26 views

objective differences between running `NetworkManager` and changing `resolv.conf`

Are there any objective differences between running NetworkManager and changing resolve.conf in the following manners? See method #1 and method #2 below. They appear to produce identical results in ...
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0answers
95 views

Apache webserver showing IP instead of domain name

I put together a website hosted on apache2, with a domain name bought through GoDaddy. I can visit the website via my domain name or IP, but the address bar populates my IP address instead of keeping ...
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0answers
102 views

Google Public DNS and `resolv.conf` - Utilize both addresses `8.8.8.8` and `8.8.4.4`

I can make Ubuntu use one of Google's Public DNS's with the following command sudo echo nameserver 8.8.8.8 > /etc/resolv.conf If I want to have the option to use either one, can I issue the same ...