Questions tagged [resolv.conf]

/etc/resolv.conf contains Domain Name System(DNS) related configuration information on Unix systems.

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No DNS on PXE booted Linux Live System with NetworkManager

I've built a custom Debian Live CD (using live-boot and containing a kernel, initrd and a filesystem.squashfs) which includes specific tools we regularly use. The Live CD works flawlessly if booted ...
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is there a way on Linux to set DNS servers using a cmd line?

I use a script that creates multiple network interfaces with IP adresses. An example of commands used by the script: ip addr flush eth0 ip addr flush eth1 ip addr add 192.168.1.10 dev eth0 route add ...
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Shell script to check resolv.conf [closed]

I need to write a shell script which checks the contents of resolv.conf Eg domain example.com search abc.com abc.org abc.net nameserver 1.1.2.2 nameserver 3.3.4.4 abc.com/abc.org/abc.net can appear ...
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Is it necessary to set a different ttl before change a Route53 DNS record value?

The first time create the Route53 DNS record with a load balancer origin DNS name with ttl 1 day. After some days, we want to change the value to another load balancer origin DNS name. Do we need to ...
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Additional Bind caching nameserver next to domain controllers

In an environment where I already have two domain controllers acting as name servers I would like to run the Bind cache server installed on Ubuntu 20.04.3 LTS to act as nameserver for specific hosts. ...
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/etc/resolv.conf is missing after installation of RHEL 8

I have installed RedHat Enterprise Linux 8.4 (minimal install) on my local server, and got some docker related issues. Then I found that /etc/resolv.conf was missing. After executing "systemctl ...
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resolv.conf & systemd-resolved: query next server on domain not found responses

I'm trying to build a simple cascade DNS resolution algorithm for my laptop: Query the servers provided by DHCP Not found / failed? Query 8.8.8.8 and it's friends Not found / failed? Query local ...
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VPS Resolv And Static IP

I have a vps server hosted with an internationally, very well-known hosting provider, and oddly enough they seem disturbingly incapable of troubleshooting their own system. There are two specific ...
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rhel + resolve.conf + what is the right resolve.conf settings

we want to know what is the right configuration in resolve.conf and about domain name in resolve.conf in our rhel 7 server we configured the following example of resolve.conf more /etc/resolv.conf ; ...
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ping: example.org: No address associated with hostname

I am facing a problem I cannot explain: If I do ping example.org I am getting the result ping: example.org: No address associated with hostname dig returns an empty result: dig example.org ; <&...
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Kubernetes through Virtualbox; Pods can't access internet services

System: VirtualBox, Debian 10 Server, Kubernetes with kubeadm I've setup a deployment and a service and I am exposing it via NodePort but my Pods somehow cant access the internet. The worker node ...
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Docker cant resolve DNS-Names outside of docker network. Receiving "read from DNS server failed"

I have deployed an Adguard Home docker container which i want to use as my DNS server/proxy. DNS resolution is working fine when i'm making an nslookup from a machine (as well as the docker host) on ...
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Add DNS options to systemd-resolved /etc/resolv.conf

I am using systemd-networkd and systemd-resolved. I have /etc/resolv.conf being a symlink to /run/systemd/resolve/stub-resolv.conf as recommended. I guess that /run/systemd/resolve/stub-resolv.conf ...
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dig: parse of /etc/resolv.conf failed

I tried using dig and I got the error in the title. My /etc/resolv.conf is this nameserver 67.207.67.2 nameserver 67.207.67.3 nameserver ns1.name.com nameserver ns2.name.com nameserver ns3.name.com ...
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How to set options timeout in resolv.conf in docker container?

How (if any) it is possible to add options timeout to /etc/resolv.conf in docker container running in Kubernetes cluster? The file is generated, so it's not possible to do that in Dockerfile. On the ...
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Fedora network configuration

I've got a Fedora 31 instance configured with an IPv6 stack and that has join an IPA domain. I've activated the IPv6 stack by editing /etc/sysconfig/network-scripts/ifcfg-eth0 Added IPV6INIT=yes ...
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Cannot ssh or ping hostname, but dig and nslookup work on Ubuntu 18.04

I updated my kernel this weekend, and now I'm using 5.3.1. christopher@HAL4:~$ uname -r 5.3.1-050301-generic I need to login to servers, but I cannot do so by hostname any longer. For example, I ...
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How to set custom settings in resolv.conf when using system-resolvd

I would like to use option values in /etc/resolv.conf. From reviewing the relevant man page (https://linux.die.net/man/5/resolv.conf) I noticed that I can configure various options. For example one ...
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HAProxy resolver doesn't work : could not resolve address

I'm on Ubuntu 16.04; I set up HAProxy as an entrypoint to services defined by domain names; those domain names are served by a DNS server (coredns) in the same machine (or VLAN network). Using ...
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Host DNS not working with docker container

I have a probleme with docker on my archlinux kernel Linux 4.19.31-1-lts #1 SMP Sun Mar 24 09:29:16 CET 2019 x86_64 GNU/Linux $ docker info return : $ docker info ...
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qmail couldn't find any host named [closed]

System: Ubuntu 18.04 LTS (fresh install) qmail dovecot Plesk 17 Mail configuration was done with plesk. It is not possible to send any mail to any reciepents on different domains. Log contains: ...
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Resolving CoreDNS Loop Error

I am trying to resolve a loop error with CoreDNS as part of a 2-node Kubernetes cluster. The issue is thoroughly documented (below), but I am not strong on dns and networking so am having trouble ...
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Query two different DNS nameservers - one for LAN only, one for everything else

On a Debian-based linux device I need to set up DNS lookups on two different DNS nameservers - one for local domain lookups, one for everything else. My /etc/resolv.conf currently is: # Generated by ...
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Linux DNS resolve rotate attempts does not take effect

I have rotate and attempts settings in my resolv file: nameserver 127.0.0.1 nameserver 10.104.64.25 nameserver 10.104.65.25 options timeout:1 attempts:3 rotate And OS info is: Linux 152a580f-e3c2-...
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Linux DNS query sequence with resolv.conf

I have a encountered a DNS resolution issue. Could someone pls give me some tips on this issue, thanks in advance~ uname -a Linux 152a580f-e3c2-405f-acde-eac4d928af22 4.4.0-111-generic #134~14.04.1-...
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Custom resolv.conf file

Is there any way I can specify a custom resolv.conf file (instead of /etc/resolv.conf) in RedHat Linux, similar to specifying custom hosts file via export HOSTALIASES=~/my_hosts? I don't have root ...
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Using custom DNS in VPN to resolv domains to different server

What I have is simple but I got a VPN issue that I don't know how to solve. In general I want to route public domains differently within a VPN. See the current role of a Debian host: A public ...
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Can't connect to Internet while F5 VPN is connected

I'm using F5 BIG-IP Edge VPN client on OS X Yosemite 10.10 and trying to find the best way to access the web, while connected Has anyone found a solution, how to make it work? Maybe this could be an ...
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Using custom etc/resolv.conf for deployed virtual servers?

Saw that cloudflare is now powering their own set of DNS servers https://developers.cloudflare.com/1.1.1.1/setting-up-1.1.1.1/linux/ We are running a couple dozen debian systems. Anyone used a ...
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Not possible to update resolv.conf

I edit /etc/resolvconf/resolv.conf.d/base: $ cat /etc/resolvconf/resolv.conf.d/base nameserver 192.168.100.16 I force an update: $ sudo resolvconf -u I check if it worked: $ cat /etc/resolv.conf ...
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Why are my dns options specified in /etc/network/interfaces not parsed by resolvconf?

I have a Ubuntu 14.04 server which has two IP addresses specified on a single interface. They are defined in /etc/network/interfaces like so: auto em1 iface em1 inet static address 192.168.1.2 ...
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Where is the "search" line in my resolv.conf coming from?

This is what my resolv.conf looks like: # Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8) # DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN ...
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Prevent additional DNS queries when "search" is not set

The host in question is running Arch Linux with hostname set to foo.example.org. There is no search directive in /etc/resolv.conf. If I ping example.com or curl example.com or wget example.com (...
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NetworkManager & dnsmasq - ignore auto DNS settings

I'm running Arch Linux with NetworkManager and dnsmasq set up. It all seems to work fine, except that I try to use the new CloudFlare 1.1.1.1 DNS, but the resolver keeps using the DNS that is ...
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SUSE 11 SP4 resolver doesn't query nameservers

My resolver is not querying the nameserver. This command is running the background tcpdump -n -s 0 port 53 & Resolver points to files then dns # grep hosts /etc/nsswitch.conf hosts: files ...
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Does linux accept a DNS reply that comes after configured timeout if it is in the middle of the next attempt?

/etc/resolv.conf is configured with: options timeout:1 attempts:5 rotate nameserver A nameserver B Both configured nameservers have a delay of 3 seconds. The following exchange of messages occurs: ...
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Unexpected behaviour of 'attempts' option in /etc/resolv.conf

I'd like Linux to make only one request to DNS server, wait for 5 sec timeout and then abort the lookup if no answer. To do this I set the following options in /etc/resolv.conf assuming that attempts ...
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Solaris 10 app server operating on two company domains

I have a Solaris server hosting Apache and Tomcat web servers, it originally operated on one company domain: appname1.company1.com With a change in company, this original domain must still be ...
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Windows 2012 R2 DNS SERVFAIL on linux / mac clients

SERVFAIL is causing issues with some of our applications on linux/macs. I presume this is Windows DNS causing some problems with our linux/mac clients? Then again Windows clients are able to do ...
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18 votes
3 answers
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Resolv Conf Multiple DNS Servers with specific domains

I need the ability to have specific dns servers for multiple networks, and i would like to know how to properly update my /etc/resolv.conf: lets say I have a major vpn, that I route all my trafiic ...
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Can't resolve server by fqdn when search domain is enabled

I have a server named site.dpt.myorg.local, which i want to access both with short name and with fqdn. When i try to use short site or site.dpt form, everything works just fine. However when i use ...
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How to make linux server query second or third or fourth nameserver IPaddress from resolv.conf

In our environment we have a very uniq requirement. Let me explain you our environment first. We have DEV,TEST,PRE-PROD & PROD environment, and every environment has its own DNS server ( Primary ...
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Is there a way to specify name servers for an interface in lxc configuration?

I'm trying to make LXC containers use static IP addresses. For that I specify lxc.network.ipv4 = 10.0.3.3 lxc.network.ipv4.gateway = 10.0.3.1 in lxc config file. I have only loopback interface in /...
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Resolv.conf reset automatically after reboot to the wrong dns

With my ubuntu 16.04, my /etc/resolv.conf change every system start cat /etc/resolv.conf nameserver 127.0.0.1 Network-manager have the correct dns name server 192.168.1.1 I removed bind9 and all ...
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What's the magic incantation to force DNS queries over TCP on an Amazon/AMI image?

It looks as though the resolv.conf option use-vc is being ignored on an Amazon AMI (latest 2016.09 version). Consider the following: [hadoop@ip-172-20-40-202 ~]$ cat /etc/resolv.conf search default....
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I'm trying to ascertain how is my Networkmanager receives specific name server information- possibly Cobbler related

When I: cat /etc/resolve.conf I see: # Generated by NetworkManager nameserver 10.100.48.19 nameserver 10.100.48.17 When I change this info then reboot, the original information returns. I'm ...
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Unkown File permissions for /etc/resolv.conf

I am unable to ping any url (for example www.google.com), neither any of the website is working. However, I can ping static IPs (E.g. 8.8.8.8). A little debugging showed that the issue is /etc/resolv....
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resolvconf coupled with dnsmasq and lxd

Q: How do I programmatically add a persistent resolvconf entry for my lxd based dnsmasq? I have a very base installation of Ubuntu 16.04 server. I have installed and configured lxd and created a ...
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RHEL resolv.conf search domains ordering constraints?

I can't seem to find anything (Google, man pages) on what the order of the search line should be used when searching for a host against DNS with multiple levels of subdomains. host and dig work ...
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Search option in resolv.conf getting overwritten by prepend statement in dhclient.conf

I have setup a DNS server for my department which is running FreeBSD 10.2. It is currently connected to the campus internet and receiving its address via dhcp, so /etc/resolv.conf looks like this: #...
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