All Questions
Tagged with networking dns
1,384
questions
1
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0
answers
38
views
DNS problem for only some devices on our network
I'm running into a DNS issue in our office's network. We had a power outage and when the router rebooted a few of the servers on our network started to have problems connecting to other devices on the ...
- 11
-1
votes
0
answers
148
views
Network/DNS issues on 22.04.4
Im facing strange issue on virtual Ubuntu 22.04.4 server (VM). Few days ago it started to fail during basic network communication. I can ping to IP adresses but when I try ping by name it returns that ...
- 11
-1
votes
1
answer
30
views
unable to do any connection after changing hostname(probably)
I needed to change hostname on ubuntu 22.04. I did it the old way, by manually editing /etc/hostname and adding
127.0.0.1 localhost
127.0.1.1 my-host-name
into /etc/hosts not knowing about ...
- 293
1
vote
1
answer
68
views
How to force Ubuntu to look at netplan for DNS and not look at resolv.conf
What is the best (proper?) way to force Ubuntu 22.04 to look at ONLY netplan for DNS configuration? I'm working with Rancher+RKE2 and their preparation script includes truncating the resolv.conf file. ...
- 11
0
votes
0
answers
42
views
disabling resolv.conf for Samba installation
Hi I would like to configure an Ubuntu server 24.04 as an AD Domain Controller using Samba.
Reading the Samba Wiki, I find that one of the prerequisites is to disable the automatic update of /etc/...
- 11
0
votes
1
answer
41
views
Connecting a domain to a VPS
I'm having trouble connecting a domain to my VPS. Maybe I will describe step by step what I did and someone will be able to give me an answer. I bought a VPS on ovhcloud. I installed Ubuntu on it. ...
1
vote
0
answers
1k
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Ubuntu 24.04 DNS resolution for local machines
I am looking for installing Ubuntu 24.04 Desktop machines in order to run a MySQL server. When installing with the graphical UI, there is an option to join Active Directory, which I wanted to do. ...
0
votes
0
answers
72
views
Cannot resolve local hostnames in Ubuntu Server 22.04
I can't resolve local hostnames while remote ones work...
ping unifi
ping: unifi: Temporary failure in name resolution
...
ping google.de
PING google.de (142.250.185.195) 56(84) bytes of data.
64 ...
- 17
1
vote
1
answer
262
views
Linux devices can ping ip address but not hostname in local network
I have a network that contains two Linux devices, a router, and a Windows machine. The Linux machines can ping each other using IP addresses and are able to resolve domain names like www.google.com, ...
0
votes
0
answers
21
views
trouble with DNS ports config
I'm just starting out setting up my own server (VPS) so still on the steep learning curve.
I'm running it on Ubuntu 22.04 with Cloudpanel installed to manage the sites. Cloudpanel loads successfully ...
0
votes
0
answers
20
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nginx traffic redirect based on subdomain
I am currently attempting to setup my VPS to host multiple different docker containers.
My domain name is hosted on Cloudflare (which has a limited amount of available ports).
After doing research, to ...
0
votes
0
answers
70
views
I can't access internet anymore after uninstalling pihole from my ubuntu server
I can still ssh to the server within local network.
I can't ping google.com or 8.8.8.8.
Here is the wireless-info script result:
https://paste.ubuntu.com/p/63t9bN7Dc9/
2
votes
1
answer
289
views
How can I solve the DNS leak when using systemd with DNSOverTLS
The problem:
I am connected to a foreign wifi on Kubuntu Desktop 22.04 and want to configure the DNS system-wide to 9.9.9.9 (quad9) with DNSOverTLS. However, on dnsleaktest.com I still get a different ...
- 123
0
votes
0
answers
63
views
Devilbox - error, "No Host DNS record found. " even after adding folder name in /etc/hosts/
I am using Devilbox and have been learning through documentation on how to work with it, I have created a folder inside /data/www/ inside devilbox folder and before that I have excluded the mention of ...
0
votes
0
answers
94
views
system-resolved and bind9 Ubuntu 22.04.4
I'm running a bind9. All requests are resolved correctly. After some times, i'm facing the following:
From clients all requests are correctly answered. "dig", "nslookup" etc works ...
- 55
0
votes
0
answers
664
views
Name resolution (hostname) doesn't work /Ubuntu 22.04 server
I cannot ping or mount using hostname of server on domain network.
Server is almost fresh install, just using apache, mysql, php for webhosting.
If I ping server with its hostname it result with this ...
- 124
1
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0
answers
106
views
Can't reach internet after reboot. But I can ping DNS servers Ubuntu 23.10
A fresh install 23.10 with UFW and OpenVPN, all works no problem. Then, after a restart, the network icon comes up with a question mark. And I can't reach the internet. I can ping whatever IP I want, ...
- 11
1
vote
1
answer
905
views
systemd-resolved dns over https (doh) with custom port and domain
I want to use dns over https (doh) on my system (Ubuntu 22 LTS) and connect to a server (smartSNI) which is listening on port 9443, but the DNS resolution doesn't work correctly.
resolvectl --version ...
- 115
0
votes
1
answer
3k
views
How to set DNS from command line on Ubuntu 20.04 Desktop?
I'm trying to set a DNS server on Ubuntu 20.04 Desktop. So far this is what I have.
In /etc/systemd/resolved.conf this is the content:
# This file is part of systemd.
#
# systemd is free software; ...
0
votes
1
answer
101
views
ping a *.local address client [closed]
I have a bind9 dns cache server running (for example with zone ".home" and any clients with ubuntu and raspberian. Additionally some other clients with Mac OS, Windows etc.
I can ping all ...
- 55
0
votes
0
answers
145
views
Ubuntu 22.04 wifi connection is lost every x minutes
A week or two ago my wifi started losing the connection every 10-20 minutes. As far as I am aware I did not do any updates or anything prior to this. I have tried all sorts of solutions found online, ...
- 101
0
votes
0
answers
68
views
Handling DNS Resolution Failure after Releasing the Primary Public IP on Linux Machine with Multiple IPs
I am encountering an issue on my Linux machine with multiple network interfaces and IP addresses. Specifically, after releasing the primary public IP (let's call it 112. * .* .1) on the ens3 interface,...
- 1
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votes
0
answers
235
views
DNS Problems with Ubuntu 22.04 LTS
I have a problem to config the correct DNS. My Server receive over 700K of SMTP request daily which are using DNSBL and in some cases the DNSBL can't handle that amount of mails. I get a reason: 530 ...
1
vote
1
answer
1k
views
Unable to connect to network
For some reason I cannot access anything other than local sites hosted on my network - I do connect to the router however the WiFi icon appears as a ? rather than showing me the signal strength.
...
- 13
0
votes
1
answer
66
views
Can't ping dynamic IPv6 Xubuntu hostname from Kubuntu laptop
Ever since I updated my computers yesterday with the latest Ubuntu updates, I have been having issues with the computers communicating with each other. Originally, nothing (Either my mobile [Android], ...
- 11
0
votes
1
answer
110
views
DNS servers and public hotspots - 25% of them fail and solution is hard to find
At about 25% of random wifi hotspots I have no trouble connecting with my phone, but my linux does not connect. I tried everything in this post.
nslookup google.com does not work
➜ ~ nslookup google....
- 103
0
votes
0
answers
92
views
Ubuntu server cant ping outside network &| DNS (Temporary failure in name resolution)
My network on the server is not working, help much appreciated
default via 192.168.50.1 dev eno1 proto static
172.17.0.0/16 dev docker0 proto kernel scope link src 172.17.0.1 linkdown
192.168.50.0/...
- 1
0
votes
0
answers
168
views
Local hostnames giving 'Temporary failure in name resolution' error
I setup a brand new VM on my network with Ubuntu 22.04 and a static IP. However, for some reason I can't lookup machines on the local network via hostname. It works fine on my older VMS. Is there some ...
0
votes
1
answer
70
views
Network settings seems to be completely broken, no logic to be seen
I have been a random problem with my server for a while, every now and then after a reboot the network suddenly completely stops working. Normally, after a few changes in the network files I am ...
- 101
0
votes
0
answers
105
views
How to prevent Docker causing my .local address to resolve to 172.29.0.1?
I have a recently installed machine (called vader), with a custom DNS entry on my Pi-hole. This works, when I try to resolve vader.home:
$ resolvectl query vader.home
vader.home: 192.168.1.212 ...
- 113
0
votes
0
answers
61
views
Slow network traffic with DNS only after migrating Ubuntu Server 22.04.2 LTS to airgapped network
I have two networks in my environment, a main network and an offline/air-gapped network. The standard process for deploying Ubuntu servers to the air-gapped network is to clone a template VM on the ...
4
votes
2
answers
2k
views
dnsmasq is not logging dns queries
Here's how I am debugging this issue from the command line:
$ dnsmasq --no-daemon --log-queries
Putting the log-queries option in the config file and running it as a daemon still showed nothing on ...
- 43
2
votes
0
answers
123
views
bind9, named not accessible over local network behind router ubuntu 20.04
i have a zte F6600R router from my isp provider with following configuration
DHCP SERVER : ON
LAN IP ADDR : 192.168.1.1
SUBNET MASK : 255.255.255.0
DHCP start IP : 192.168.1.10
DHCP end IP : 192.168.1....
0
votes
0
answers
36
views
local DNS server for dns caching OpenVPN clients
i have two servers. One in the netherlands and one on australia.
They are connected to each other over vpn.
When a client connects to the australian server there is the netherlands dns server provided ...
- 1
1
vote
0
answers
60
views
Cannot resolve hostnames on ping after upgrading from 18.04 to 20.04
I have recently upgraded a server running 18.04 to 20.04. The in-place upgrade seemed to go fine and installed without a hiccup, however the end goal is to upgrade to 22.04 and when I went to go run ...
- 11
0
votes
1
answer
259
views
Ubuntu 22.04 - 8.8.8.8 DNS is set on the server but not in resolve.cnf
This is the content of /etc/resolv.conf
nameserver 127.0.0.53
options edns0 trust-ad
search .
However, resolvectl status gives
Global
Protocols: -LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
...
- 13
0
votes
1
answer
270
views
Using Ubuntu 22.04 as DNS Server with bind9
I want to use a simple ubuntu 22.04 server as a DNS Server for my pc.
I created a new server, with a static ip address, that i will type in to my dns in windows.
My problem is, when i try
nslookup ...
- 1
0
votes
0
answers
85
views
Debugging DNS stub resolver
I am using Ubuntu 20.04.6 and I'm facing issues with the DNS stub resolver.
Using the default settings, I cannot access several webpages. However, when I add the google DNS address to /etc/resolv.conf ...
- 1
4
votes
1
answer
278
views
dig works only when specifying a nameserver
I have a Ubuntu 20.04 Desktop installation. I am unable to access internet or reach any servers by name. The DNS lookup is failing. DNS Servers are Windows DCs 10.0.1.22, 10.0.1.21 and two Cisco ...
- 171
0
votes
0
answers
84
views
Preparation for Ubuntu 22.04 LTS home server
I just setup Ubuntu 22.04 LTS Server Edition on my home lab PC. My Internet ISP provide me with dynamic public ip address, and I use freedns.afraid.org to update record for my public IP address.
I set ...
-1
votes
2
answers
440
views
How to manually create your own nameservers and manage multiple domains(without the help of control web panels) [closed]
I would like to know how to create your own name servers and manage them on your own ubuntu server(so they will no longer be configured on the domain registrar panel).
Like, for example, I would take ...
- 3
0
votes
1
answer
67
views
Changing dns to OpenDns works only in the current session, not for my child and not after reboot
I configured OpenDns as suggested here (even the final part)
It works immediately after the changes, BUT:
If I switch to the user of my child, it doesn't work anymore
If I switch back to my account ...
- 111
1
vote
0
answers
95
views
Strange UFW Block Logs
i noticed repeats of the following logs in my server:
Dec 3 21:55:27 alice-server kernel: [287677.084885] [UFW BLOCK] IN=ens18 OUT= MAC=01:00:5e:00:00:01:90:9a:4a:dc:31:62:08:00 SRC=192.168.0.1 DST=...
- 11
2
votes
0
answers
204
views
DNS resolves intermittently on ubuntu 22.04
Yesterday my Oracle-hosted server (Cloudflare DNS) was suddenly cut off, replaced by the cloudflare "Origin is unreachable" code 523 page
I spent a long time looking for the cause and, ...
- 21
0
votes
0
answers
599
views
Ubuntu 22.04 does not connect to any Internet address
I have an Ubuntu server 22.04 that has been set up recently. It worked a couple days and I turned the first few knobs until one day, I was not able to connect to the Internet anymore. It started when ...
0
votes
1
answer
463
views
Ubuntu Server cannot ping gateway or resolve names
I'm dealing with a very strange networking issue.
I'm running Ubuntu Server 22.04 and every client can get to it and the internet on my home network. However, the server cannot even ping the gateway (...
- 11
0
votes
0
answers
60
views
Bind9's working only locally
I'm trying to make multi sites with apache2, but I need domains to ping it, therefore I'm trying to host dns with Bind9.
The problom is that the dns are pinging only locallly!
Why?
If someone knowns ...
- 9
0
votes
1
answer
280
views
Options for migrating Windows 2012 R2 DC to Ubuntu
I have a small Windows domain, with the PDC running on Windows 2012 R2. I am interested in retiring the Windows server and replacing it with a primary and backup DC's hosted on Linux VM's.
The ...
- 67
0
votes
0
answers
102
views
Internet problems
Today suddenly internet stopped working. Time ago I had to re install ubuntu because each time I ran my system I had to run sudo dhclient. This afternoon internet stopped working, I was connected and ...
- 1
0
votes
0
answers
76
views
I move to next hostel. I try login to network, but in Firefox / Chromium don't show to me that option. I get connection with network device, IP DNS
I move to next hostel.
I try login to network, but in Firefox / Chromium don't show to me that option.
I get connection with network device, IP and look good.
Firefox / Chromium can't open websites ...
