Questions tagged [domain-name-system]

Question 1

We recently re-launched our website and migrated it from an old Firebase project to a new Firebase project. Details: Domain: farefirst.com (existing domain, working for years) Registrar/DNS: GoDaddy ...

Question 2

On my local network, I set the System domain-name in my EdgeRouterX to local. For most applications this seems to work fine. I can find a server by navigating to someservername.local, I can SSH into ...

Question 3

I’m sending email from my mail server to Gmail. Gmail rejects the message with the following error: 550 5.7.25 The IP address sending this message does not have a PTR record setup or the ...

Question 4

I am unable to access my website when I am connected on same network. From outside anyone can access it with no problems. Provider: Vodafone with static IP address for business, all needed ports are ...

Question 5

We have a large AD domain with three Windows Server 2022 DCs. DNS registration and renewal works with Windows domain members. I do not have control over the DCs (although I can access them for ...

Question 6

Prefix: Just to thank the people who answered, and to say that the deployment went fine, and the DNS changes took effect after the Time To Live (TTL) of 300 seconds in UK, Singapore and Australia, and ...

Question 7

Some background I have a home network built on a NetGate 1100 with pfSense. This has been running well for a couple of years with IPv4 only. I have upgraded it now to pfSense 25.07.1 With an IPv4 ...

Question 8

We have a few domains, which are not expected to send emails, therefore I would like to know if there is a way to effectively forbid those domains to send emails to prevent spoofing my company various ...

Question 9

I have a CentOS 7 server where outbound Internet is restricted using iptables to specific external IP addresses. For example using Perplexity’s IP addresses: sudo iptables -A OUTPUT -d 104.18.26.48 -j ...

Question 10

I'm running Postfix 3.10 on an Ubuntu 24.04 server, with these settings in /etc/postfix/main.cf: smtpd_client_restrictions = # previous entries omitted for brevity warn_if_reject ...

Question 11

NOTE: I wanted to ask this on StackOverflow but they state that DNS questions must be programming related so this doesn't quite fit that bill. We have a bunch of domains on a server. Typical DNS for ...

Question 12

I've been hosting a static site via github for a few years on the domain shown. Recently I added a number of sub domains to reserved IPs on my network. s01.pixeloven.com d01.pixeloven.com w01....

Question 13

Our internal domain is domain.local, and external is domain.com. Typical split DNS situation. My question is how do people typically handle this? We are about to start our Exchange migration, and ...

Question 14

I am trying to use Active Directory DNS to create "easier" to use URLs for staff. enroll.domain.org --> https://aka.ms/mysecurity reset.domain.org --> https://passwordreset....

Question 15

This question builds on Why don't NS records contain IP addresses?. I understand that a domain nameserver - say ns1.com - stores NS records as mappings domain-to-hostname. If a client wants to get ...

Question 16

I have an OCI tenancy with a compute instance in the public subnet. I purchased a donraikes.com domain through godaddy.com. I associated donraikes.com with my tenancy by creating a public zone in the ...

Question 17

I am investigating reverse DNS (PTR) records and how they are used today. For example stackoverflow.com resolves to 104.18.32.7 and that IP has zero PTR records (neither does the domain's other IP). ...

Question 18

NetworkManager-run dnsmasq doesn't pickup upstream servers from .conf file if I remove dns= from NetworkManager connection config I am running WireGuard VPN server on a VPS and want to avoid DNS leaks ...

Question 19

We configured Unbound on a RHEL-based server ( RHEL 7.9 ) to provide DNS caching. Here’s the relevant part of our /etc/unbound/unbound.conf: server: chroot: "" verbosity: 1 port: ...

Question 20

Background Recently had an issue where some of our developers couldn't pull Docker images from mcr.microsoft.com. This happened over time, and sometimes when they changed locations. Finally narrowed ...

Question 21

Several months ago I reconfigured my server to dispense with PLESK (I never really used it, it was required by the server service, when they were bought out they didn't care anymore and it was ...

Question 22

There are nTDS connections in the Lost and Found container in the Configuration container. DC02 is a decommissioned server in lastKnownParent attribute. DC03 is a decommissioned server DC05 , DC01 is ...

Question 23

I have dnsmasq and a Node server running on the same machine. The Node service's listening port is open to all interfaces (0.0.0.0), and whenever dnsmasq receives a query for the domain associated ...

Question 24

I've a server with both IPv4 and IPv6 interfaces. Postfix is multihome, one instance, named postfix, is IPv6 only, and another, named postfix-kupec, is ipv4 and ipv6. Here's an output from postconf: ...

Question 25

Attempting to implement DnsServerQueryResolutionPolicy per: https://learn.microsoft.com/en-us/windows-server/networking/dns/deploy/primary-geo-location which worked fine in my POC. I implemented it ...

Question 26

Important Information Domain: futuremotion.studio Registrar: Namecheap DNS: Cloudflare Free Plan E-Mail: Google Workspace Hosting: I was previously set up with Namecheap hosting, but ...

Question 27

We have several domains, one of which runs a google compute engine with DNS registered at godaddy but whose primary DNS server is at google. How does one manipulate the A records for a domain ...

Question 28

Got a weird issue that I've been dealing with for a while and haven't been able to permanently fix. Got a virtual Windows Server 2016 domain controller and several other VMs running on a Server 2016 ...

Question 29

Example: sub1.example.com. -> 0.0.0.0 (A record) sub2.example.com. -> 0.0.0.1 (A record) *.example.com. -> 0.0.0.2 (A record) Is this a valid configuration? Will sub1 and sub2 point to .0 ...

Question 30

I have a Firebase Hosting site: https://app-name.web.app My DNS (managed through a third-party provider) points: app-name.example.com CNAME app-name.web.app This works fine on almost all networks, ...

Question 31

Doesn't the public Spamhaus work reliably anymore? I have multiple own recursive DNS setups on LAN/localhost without being open resolvers, and from time to time some lookups to zen.spamhaus.org ...

Question 32

I am aware of the several other posts about the error in the subject line, but those fixes haven't helped. My goal is to pull down containers and run/test them via Docker compose so I'm thinking a ...

Question 33

I posted a question about this yesterday but it was I guess the wrong question to be asking. I will explain the problem more clearly, in the hope that some bright individual has the answer we are ...

Question 34

We send some email through an SMTP server, which is our our MX record (server1.newsletter-domain.com). One specific recipient ([email protected]) - we do not want these emails sent by ...

Question 35

I have a setup where: client = x.y.36.152 recursive resolver + DoH server = x.y.36.153 authoritative DNS = x.y.36.150 TLS server = x.y.36.148 I’m running BIND9 as the recursive resolver on .153. I ...

Question 36

On an Ubuntu 24.2 server I run rsyslog. Logfiles are automatically created based on reverse DNS; my intended operation. After an unscheduled reboot, some filenames were based on IP addresses. Quite ...

Question 37

I need to configure DNS so that: Users from Russia access example.com directly via IP 1.2.3.4 (no Cloudflare proxy). Users from other countries go through Cloudflare on IP 5.6.7.8. Can this be done ...

Question 38

I have an HTTPS DNS record for fanaka.pro, pointing at readthedocs.io. My zone file: fanaka.pro. 3600 IN HTTPS 0 readthedocs.io. fanaka.pro. 3600 IN NS ns1.desec.io. fanaka.pro. 3600 IN ...

Question 39

The internal corp.local DNS is not resolving and pinging via VPN on a Windows VPN client. There is a host machine on the local network running a Docker container with a VPN (oscerv) server inside. ...

Question 40

I have configured Cisco Umbrella VA to handle DNS resolution for some domains, and I’ve set up conditional forwarding on my Domain Controller (DC) to forward queries for example.com to Google DNS (8.8....

Question 41

I have this bind9 settings: named.conf: include "/etc/bind/named.conf.options"; include "/etc/bind/named.conf.local"; named.conf.options: include "/etc/bind/rndc.key"; ...

Question 42

I am running 2 pods busybox and nginx in the namespace called webcn have exposed the nginx pod as a service i am trying to understand working of name resolution in kubernetes within a namespace from ...

Question 43

My team has a sub-domain from our company delegated to a Route53 zone, so we can manage the DNS entries for our own applications we develop. We have a setup where each application gets it's own AWS ...

Question 44

We are using firebase hosting with a custom domain for our application. No configuration there has changed, yet in the past few days we are getting reports that some people get an SSL certificate ...

Question 45

How server usually handles multiple IP after DNS query reply ? Round Robin: A common approach is for the client to cycle through the IP addresses in the order they are received (round robin) for ...

Question 46

I've only ever known domains to use a single set of nameservers (2 to 4 all from one DNS provider). I've just inherited a failed migration from a client who is now having email issues (a security ...

Question 47

I have a domain that is configured to use the DNS servers of Cloudflare. Here are the DNS settings: Here are the Cloudflare settings: I want to change the host from easyhost.com(hostway.com) to ...

Question 48

We have recently taken on various domains on a new Plesk Server from another webhost. Their zones were signed with DNSSEC which we have no experience of. We have been receiving automated emails about ...

Question 49

I am having this weird Postfix issue with Spamhaus excess volume error. First off I checked what the error suggested to check here I followed the instructions and changed my configuration as follows: ...

Question 50

Has anyone seen this issue before? So two DNS servers (Domain Controllers) via site-site VPN. with a client in a third location. The client can FQDN and hostname values for the servers.. Dcdiag shows ...