Questions tagged [internal-dns]

DNS that is visible within your corporate network and VPN, but which is not visible on the public Internet.

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Zone files not updating in master nor slave

Master /etc/named.conf: options { listen-on port 53 { 127.0.0.1; 192.168.2.2;}; listen-on-v6 port 53 { ::1; }; directory "/var/named"; dump-file &...
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How to access a private zone via DNS peering

Let's say I have 2 projects (A, B), each with their own VPC and VPC peering enabled between them. Then I create a private DNS zone in project A, let's say with .internal as DNS name. Then I add an A ...
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bind9 separated zone file for *.sub.domain.com

I want to create sub subdomain that are only visible from my private network. My named.conf.local looks like this: acl internals { 127.0.0.0/8; 192.168.1.0/24; }; view "internal" { ...
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Bind9 forward top level domain

Hi all just starting working professionally with bind9 and dns, say I have an AD/DC server (with dns) running on internal.com but my bind9 is authoritative for sub.internal.com can I do a forward zone ...
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Multiple servers behind one public IP [duplicate]

I am hosting multiple servers behind one public IP. (Mostly in Proxmox VE) Currently, all the services are on separate ports. I would like to use multiple domains to reach different services and am ...
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Conditional forwarder for subdomain through DNS proxy

I have a Windows AD domain : contoso.local I want to forward all requests to some.contoso.local to another DNS server through forwarding DNS server: contoso.Local.DNS => Proxy.DNS => some....
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Stop dnsmasq DHCP binding to wildcard IP address

I'm trying to configure dnsmasq to provide DNS and DHCP but only on specific interfaces, on Linux. I have three interfaces lo, dummy0, wlo1: $ ip link 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 ...
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How to use another DNS Server when the PC is not in domain?

I have two DNS servers (on DCs) in my domain that my clients use when they are connected direct in office or with VPN. I want to set up another external DNS server, and tell the PCs to use this server ...
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DNS Scavenging on Enterprise Environment

About DNS Scavenging in Microsoft Active Directory internal DNS server, why does by default it is not enabled? how do you usually implement this scavenging system on your enterprise? (what to look out ...
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Identifying the TLD and SLD of a URL

I was given a question to identify different parts of a domain and I got the answer wrong. Here is the URL enter https:\\www.example.co.uk What is the, Top-Level Domain? Second Level Domain? to which ...
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Configure DNS routing in wireguard

Can anyone help to configure routing in wireguard, please? What i have: Linux server with installed wireguard, unbound dns, pihole, seafile. router keenetic speedster iptables is set to deny 80 port ...
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Windows DNS - internal A Record for pool.ntp.org - Subdomains don't resolve [closed]

For our phone provisioning we need to resolve "pool.ntp.org" to an internal which does work fine. We made a primary zone named "pool.ntp.org" and a single A Record with the ...
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AWS route 53 inbound resolver endpoints vs using .2 address in a VPC

I am looking to resolve addresses in a private hosted zone network using customised forwarding rules configured in an on-prem DNS service. The forwarding rule would effectively say, "for my ...
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Pushing local DNS server through openVPN on mobile connection

I have an OpenVPN server running on my Synology NAS on local IP 192.168.9.36. I have an application on the NAS running on local IP 192.168.9.36:1234 and I have a reverse proxy that allows me to access ...
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DNS over VPN subdomain exception

I’m hosting a Munki repository on our local server for software deployment. It is reachable on a subdomain internally. Since everyone is working from home now, I’d like to mirror the repo to a ...
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What causes a computer/phone/device to do a DNS lookup for its own hostname?

The two main things I'm wondering are: What causes a computer/phone/device to do a DNS lookup for its own hostname/FQDN How long after a device leaves a network will it retain the "settings"...
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DNS Error 4000 occurs regularly

I have a Windows 2019 Standard server that is the sole DC on a small network. Regularly users can't access the networked accounting software on the server. When I try to access the DNS admin on the ...
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How does DNS work across two separate networks using NAT?

Apologies for sounding naive in advance, I am a newbie in servers/networking and have a generic question around Load Balancers, DNS and NATting. We have an app deployed on our private data center. The ...
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Weird wpad DNS queries, anyone seen this?

I noticed that one computer (Windows 10) on our company network does some strange looking queries to our (internal) DNS server (dns.company.com). I see the wpad-query every minute, and then every ...
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Can I safely delete a parent zone in Window Server DNS?

AD has two fwd lookup zones: company.com and corp.company.com. I'm not sure of the correct terminology here but corp.company.com is the root or main or base domain; that is to say all objects in the ...
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Routing on local LAN with SSL

We have multiple QA machines on our local LAN that run different sites, each machine on a different version: QA1 runs test1.167.company.com, test2.167.company.com QA2 runs test1.168.company.com, test2....
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Different DNS records on offline local network with valid DNSSEC

This is pretty much DNS spoofing on local network including DNSSEC, but I believe it should be somehow possible since I'm the legitimate owner of the domain. I'm planning to provide a service during 1-...
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Is there a DNS cache that can automatically re-resolve its cache around the TTL timeout?

This is for a server setup with a wobbly upstream DNS for company internal server names. Sometimes, when an entry has fallen from the cache due to TTL, and our system tries to resolve it, the upstream ...
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42 views

Looking outside the internal DNS zone when using the same domain

So inside my network, we have a local DNS server (bind9). Let's say our internal zone is veridani.com, when I make local entries such as test.veridani.com it would work normally, and when I'm looking ...
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Dual DNS Issue - Internal & External

I'm in a fix here in offering a softphone solution for a company to allow users work from home. CURRENT SCENARIO: The company has an existing internal Windows DNS "ABCcompany.com" and ...
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How to configure bind to not to do internal recursion?

While quering my authoritative-name-server (implemented with bind locally in VM) for "A" record of "host1.cool.com", it internally resolves the query using recursion (maybe) and ...
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How to change the domain name in access URL of a web application hosted on MS Azure?

I have a question about changing the domain name in access URL of a web application hosted on MS Azure. We have managed to recently create a clone of an existing Virtual Machine (VM) for a different ...
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Setting up a client to use a local DNS server

I have an Ubuntu Server (20.04) (SERVER) on which I'm running dnsmasq. This machine has a local IP of SERVERADDRESS I have a Macbook Pro (CLIENT) on the same network - and I updated the DNS rules on ...
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How do I flush the DNS cache for programs running on Ubuntu server 20

I have moved my LDAP server (ldap.intranet.local) from a VM on one machine (192.168.0.5) to a docker container on a new server (192.168.0.7). I have updated the DNS records. When I turn off the LDAP ...
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Implementing Reverse DNS in a Live Environment

I've been tasked with implementing reverse DNS internally in our Windows environment. What are some risks I should watch out for, and what is the best way to setup a test environment for changes like ...
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Vagrant / Docker: Could not resolve host occasionally

In my dev machine, I am running 2 Docker sites (frontend and API backend) on top of Vagrant (CentOS). In the main host (Windows), I have the ff. entry in the hosts file 192.168.2.200 docker.test The ...
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how to setup dnsmasq for DNS for private and public hostnames via different DNS servers [duplicate]

lets say i have this private hostname dev.private.example.com that is only accessible in a private network over VPN connection and i have prod.example.com that is accessible to the internet. I have ...
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Correct Bind DNS configuration for both internal and external network with Ubuntu Server 20.04

I'm working for an office in primary education and I'm setting up a local server with Ubuntu Server 20.04 for both internal and external use. All schools and offices belong to the national network '....
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upstream timed out (110: Connection timed out) while proxying connection - Nginx/Raspberry Pi/Ubuntu 20.04

I cannot find any help with UDP, so I have come here to ask. I have a DNS cluster set up on Raspberry Pis running Ubuntu 20.04 and Nginx. The proxy is used for UDP on port 53. I am needing to put this ...
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Docker Local Communication Between Services

I have 2 services inside my docker cluster. frontend runs on port 8090, and backend runs on port 8000. How can I make frontend call backend via local DNS like fetch('https://backend.local/')? Because ...
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Proper behavior for a DNS Server when it is queried for a domain it doesn't control in the case of Split-Horizon DNS?

So one of our cloud providers offers a lower-latency, zero-rated "Internal Networking" option between VMs. The interfaces on the internal network are in the 10.x.x.x IP Space. When one of ...
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1answer
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SAMBA shares don't work with short server name

I have a legacy SAMBA server to share files. But I can't mount windows disk with short name: net view \\dades.company.es -> That work net view \\dades -> That don't work net ...
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In Nginx what is the resolver directive mechanically doing to avoid errors and warnings?

Environment: Nginx, Node.js I've read the Nginx Docs on Resolver, I understand it's used for DNS and I include it in my config. However I don't entirely understand what it's doing or when and why I ...
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How do VPNs block DNS queries to other interfaces?

I'm trying to understand how DNS routing works with/without a vpn. I have the following interface. Wireless LAN adapter Wi-Fi: DNS Servers . . . . . . . . . . . : 192.168.40.1 nslookup on this ...
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Possible to send real IP through Nginx UDP balancer to DNSMasq backend?

UPDATE: I uninstalled Nginx and reinstalled/compiled from source so I could get the ngx_stream_realip_module, but still cannot figure out how to forward the client IP instead of the proxy IP. I have ...
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Local mail exchange with DNS servers

I have a problem with correctly setting up a working infrastructure for testing mail spoof preventing mechanisms. As stated in a graph below, I have 2 mail servers (centos1 & 2) and 2 DNS servers. ...
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Local BIND DNS Caching server clients not resolving public DNS, only internal zone

There are a bunch of commented sections to give an idea of what I've tried. Note, this is getting copied in as a jinja2 template via an ansible playbook (that's why there is an ansible variable in ...
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337 views

Use of private and public DNS with DNSSEC

My company, 'example.com', has a public host www.example.com. The (legacy Windows managed) internal network has several internal hosts internalhost1.example.com, internalhost2.example.com and so on. ...
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Rancher problems with dns losing their internal references

I have an ecosystem with microservices in the rancher and I have a very annoying problem. The services have many relationships with each other or sometimes with internal services aimed at developers (...
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Is it safe to use DHCP Discovery to get DNS servers in my program?

I'm trying several ways to retrieve available DNS servers, for example, using a custom configuration file, using /etc/resolv.conf, using command line systemd-resolve --status. Also I implemented a ...
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Removing DNSSEC - Can it be done, and how can I?

A little while ago, I deployed DNSSEC because in doing so I reduced the number of security configuration checks I needed to implement on my local domain's DNS. These are Windows Server 2012R2 ...
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Setting UP disaster recovery , one region to multi region in Google Cloud

I'm new to GCP and also learning about Multi-Regional architectures . We already have single region ( but multi zonal ) infrastructure setup. DNS names of the internal components do not have region/...
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2 VPN connections, But DNS of the second one is not reachable

I have to use 2 VPNs to be able to connect the Network of my Work. If i use the OpenVPN (my work vpn) i can resolve the DNS normaly. If i connect another vpn before i connect the OpenVPN, i can reach ...
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245 views

How to set custom port for DNS in systemd-resolved

I want to add local DNS server with port 8600 to systemd-resolved for request forwarding. I've tried to change /etc/systemd/resolved.conf like this [Resolve] DNS=127.0.0.1#8600 but this is not counts ...
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Bind9 .local stub zone

I have a Windows 2012R2 Windows AD domain "example.local" that I need to to setup a stub (preferable) or a conditional forwarder but my named fails to locate or resolve a remote ".local&...

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