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Questions tagged [domain-name-system]

The Domain Name System, usually referred to by the acronym DNS, is a hierarchical, distributed database where the keys are domain names. Questions involving publicly accessible domains should include the real, Fully Qualified Domain Name (FQDN)

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Why does api.nuget.org not resolve within my docker-compose devcontainer?

I am running Windows Subsystem for Linux v2 with Ubuntu 20.04. Within my WSL I am running a VS Code dev container based on the docker-from-docker-compose container. From within my dev container I ...
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DNS and Cache all over the place on migration (same domain different server/ip)

Something that usually is seamless is becoming a bit of a nightmare. Tried to do a migration to a new server, then we reverted back to the original server due to some problems. Up to this point you ...
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How to set up DNS on google domains to host tomcat websites on the internet

Excpectations / Target We have a domain as (say) example.com bought on Google Domains and a PC running with windows 10 Pro We intend to make this PC a server for hosting 2 of our web-apps app1 and ...
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How to use DNS to reference instances of a Server

I would like to use our internal DNS server for linking names from provisioning to final use. So I imagine it like this. A server comes into our network and gets a DHCP or a static address and then ...
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How can i redirect a malicous domain to a web server? [closed]

I configured a dns server for my home network with bind. I want to know if i can redirect a malicous domain (or any other domain) to a web page hosted on my local web server (made with Xampp - Apache)....
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How to setup Nginx container load balancer failover

I am creating an API application which I want to deploy in the cloud and my application is made up of the following containers: Nginx Container: API Gateway API container SQL Server Database ...
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Centos7 slave zones doesn't query master for zone file

This is my named.conf. These are zones on 192.168.2.194. Also, 192.168.2.194 can successfully query zone files from centos 7 master zones.
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Can I resolve the same domain internal and external?

I have a domain on the internet (purchased from CloudFlare) called: mycompany.com there I have a CNAME created help.mycompany.com, and it works and I would like to do the same for a page on a server ...
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How to "create" a Domain Name

Normally when I want to buy/rent a domain I do it like this: Visit providers site e.g. Go-Daddy Search for a desired domain name Rent the domain for a probably too high price Now what is the process/...
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1 vote
1 answer
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Who manages sub-subdomains when you use a CNAME

This is the DNS configuration: blog.example.com CNAME example.host.com Then what happens if someone makes a DNS query about a sub-subdomain (e.g. sub.blog.example.com)? Is that DNS query redirected ...
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How to dynamically update dnsmasq with openvpn clients

I have openvpn working, and I can ping via hostnames if they are in the dnsmasq hostfile, but currently I put them in the hostfile with a learn-address script. The problem is that this script only ...
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How can I set up domain-name-access to home server using cloud server with public IP and VPN? [closed]

srv_pub srv_target +-----------------+ +---------------------+ Internet | VPS | VPN 10.8.0.0/24 | HOME SERVER | -------...
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Wrong results after DNS Zone transfer with NS records being updated properly

I migrated a DNS Zone example.org from one provider (foo.tld) to another one (bar.tld) one week ago. To test the successful transition, I created a new TXT record test.example.org on bar's backend ...
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one of node in my k8s cluster,cannot resolve domain name

one node cannot resolve domain name I have a k8s cluster.It has one master and three nodes. K8smaster, k8snode1, k8snode2, k8snode3 I run this yaml for test. apiVersion: v1 kind: Pod metadata: ...
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What's required to let a domain send outbound emails from multiple domains? [closed]

Let's say I have: 40 outbound emails to send main domain - main_domain.com 4 separate domains-workers with Postfix - mail.my_postfix1.com...mail.my_postfix4.com Goal: send 10 emails via each of 4 ...
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DNS Monitoring Tool Bind9 or Powerdns Monitoring Tool (Open Source) [closed]

Hello guys hope you all fine kindly suggest me any good monitoring tool for DNS monitoring, Tool should monitor Query per second, Query types, query fail, drops, and other important things related to ...
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Bind9 DNS rate limit or QPS optimization

Hello everyone hope you all fine, I am working on DNS bind on centOS 7, need to optimize, in our environment currently 30000 to 40000 qps checked by dnstop command, at peak hours DNS start dropped ...
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Dynamically register hostnames on DNS server (via DHCP)

I want to set up a small network, where a central DHCP server leases IPv4 addresses to the clients. The clients already have their hostnames set and should advertise those to the central DNS server, ...
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-2 votes
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DNS Not Working in Centos7 Server

I'm using PowerDns. Created private hostnames pointing towards my ip but when i check on dnschecker.org it is not pointing towards my server and nameservers are also not working therefore unable to ...
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BIND9 installed on CentOs security points

Hope you all doing Well. Actually we are running a DNS servers on CentOs using BIND9, they are recursive/authoritative. My question is any way to filter/Stop/Limit DNS query based types like (TXT, ...
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Is it possible to terminate ssl between servers behind haproxy, using the existing haproxy's ssl termination

I have an haproxy server doing SSL termination for traffic from the internet and a domain name GitLab.private pointing to it(orange path in the picture). The problem I'm facing is when I want to ...
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Unchecking the "Register this connection's addresses in DNS" option does not remove DNS records

On Windows Server 2016 I have two NICs, one of which has multiple IP addresses (172.x) and the other that has just one (192.x). On the NIC that's 172.x, I've unchecked the "Register this ...
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Remove discarded subdomains (wildcard) from subdomain scanners

I have a server which I use with my own domain name, with a wildcard DNS record. On the server side, I use the nginxproxy docker image to autogenerate VHosts. This allows me to add new websites/pages/...
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Workstations on a Windows Network have strange FQDNs in DNS

I manage a site with around 50 Windows desktop PCs. On the network is a single domain controller, file server and deployment server all running Windows Server 2022 (up to date). Recently, I've noticed ...
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DHCP , DNS , FTP , what is the best way to run ? dockerize or just simple install on ubuntu? [closed]

I'm going to install DNS and DHCP and simple FTP service on my company network. My network has about 200 clients, what is the best way to install those services? on a docker environment or just simple ...
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CNAME (pointing to the same server) asks for credentials

Let's say I have two Windows Servers: dc1 dc2 And I have a CNAME record: MyFileServer (pointing to dc2) If I from dc1 opens share \\MyFileServer\c$, then it works fine. If I from dc2 opens share \\...
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Domain unavailable after switching NS records

I have a situation where I'm using route 53 to manage our domain. The plan was to migrate the public hosted zone which we were using. There are now two public hosted zones with the same domain. The ...
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How can I identify any computers by their hostname through my Cisco ASA5506 Firewall?

I have set up my Cisco ASA 5506 with a very simple configuration (port 1/1 as wan and port 1/2 as lan) with a simple DHCP server dynamically assigning the ip of the only lan port (so it will always be ...
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How to configure bind9 for forwarding some of domains?

I have a list of domains. I want the DNS queries of domains in the list being forwarded to 8.8.8.8 and other domains being resolved by bind9. How can I configure bind9?
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having www.domain.com serve up content from digitalocean spaces cdn

Say I have domain.com and I would like it to serve up static content hosted on a DigitalOcean Space. I updated my DNS registrar (GoDaddy) to have ns1.digitalocean.com and ns2.digitalocean.com as the ...
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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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How would you troubleshoot / fix samba ad dc dns errors

I set up 2 samba ad dcs on Ubuntu Server 21.10 in a heterogeneous environment 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 ...
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Caching DNS queries in Docker container

I wonder what would be the best option to cache DNS queries inside a Docker container? Container deployed on cloud vm instance.
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FQDN as a Forwarder in BIND [closed]

My provider is changing his DNS infrastructure and we have to change forwarders IP to fqdn (Bind). Is there any option to handle that kind of change?
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How to log verbose details about DNS update queries in bind

Is there any way to log failed DNS update queries with Bind 9 (9.16.22 on Debian) in a more verbose format? I tried all logging categories and found update messages in an update-security one. But ...
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Setting up an Access Point, Raspberry Pi, and Laptop to serve a website in a classroom. "The internet in a suitcase" [closed]

Our trainers experience bad internet connections at some schools. I would like to provide them with a "mobile" (as in take it on the train) version of our platform running on a laptop, which ...
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-1 votes
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Error on setting up SPF and DKIM - This system does not control DNS for the "website.com" domain

I have this information system that sends emails to users. Some people report that they don't receive the email but it is actually being sent to their Spam folder or the email is not verified ...
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Centos - Unbboud and URIBL_BLOCKED blacklist

I am facing the following problem: My websites have contact forms. People reach out to me via contact form. I receive 1 email after every contact form sent. Since about 1 week Ms Outlook is marking my ...
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What does 0.0.0.0/0 mean?

For example in an 'allow' statement in BIND or in Chrony config files. Does allow 0.0.0.0/0 mean allowing any clients or allowing no clients? My question isn't about the specific programs, but just ...
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Office 365 disregards MX record configuration after moving to Google Workspaces

We have recently moved from Office 365 to Google Workspaces. Let's say the domain name is example.com. We let Google switch MX records in the domain management of our provider but did not touch Office ...
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DNS query failed for degrading feature set?

# env $ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 18.04.5 LTS Release: 18.04 Codename: bionic $ systemd-resolve --vers systemd 237 +PAM +...
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2 votes
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Remove RRSIG record from GoDaddy subdomain

I added 4 NS entries for a subdomain for a SalesForce email campaign. SalesForce has since complained they see an "RRSIG entry for the subdomain" and they "do not support (add to NS) ...
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Server works, domain does not with VPS [closed]

I have to deal with clear VPS with Ubuntu 16.04; Apache (and domain). The server itself works fine via ip-address. I have successfully installed php via ssh, so now I even have some Linux experience. ...
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Configure Windows DNS Server to throw SERVFAIL for certain domain

As some sort of background: We are migrating from one IT infrastructure to another, though we cannot get rid of the old infrastructure for the foreseeable time and need to keep access to it - even ...
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how to implement edns client tagoption code

I've been searching for edns and found these documents. They mention something called client tag and server tag. Is there any way I can implent those tags? Here is my use case: Our product teams have ...
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Cloudflare not resolving adobe.com?

in my setup, a local Bind9 server forwards DNS requests to Cloudflare (1.1.1.1) with DNSSEC activated. My syslog shows many timeout entries for well known domain names (like adobe.com): Apr 28 19:39:...
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MIKROTIK MULTIPLE PUBLIC IPs PORT FORWADING USING ONE ISP

How can I configure mikrotik router to use two public IPs at the same time from a single isp for my centos webserver panel. .co.zw domain allows two different nameservers to have two different public ...
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dig not returning answer for domain registered with namecheap?

Running dig chimu.sh Results in the following: ; <<>> DiG 9.16.1-Ubuntu <<>> chimu.sh ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: ...
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2 votes
1 answer
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DNS - Unbound - How to provide different IP for a server based on client network

We have an intranet DNS server using Unbound in FreeBSD. We have another file server with multiple network IP, First one is 10.10.10.10 and Second one in 192.168.10.10. Is there any way that DNS ...
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-3 votes
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Postfix mail server receiving mails from second domain

I need little help... I have postfix mailer working, I can send mails out, receive mail from anywhere to my domain. But I need to make the mailer able to receive email meant to other domain for ...
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