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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Windows 10 fails to register host to DNS server on boot

So the situation is as follows. We have rolled out Windows 10 laptops that auto-connect to the wireless. The clients are Windows 10 and the DNS and DHCP server are Windows. When they are docked, ...
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DC's storming me with issues

Hi I have 2 DC's (server 2019) (1 physical, 1 Virtual) was working good, but last month I did notice some issues like I couldn't connect from dc2 to dc1. so I opened Event Viewer to find muliple ...
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Redirect `http://10.1.10.7:8900/some/long/path` to `mydomain.com` on domain network

Where I work, we use an enterprise web-based software. To access the different pages, users need to enter a long url, like the one in the title: http://10.1.10.7:8900/some/long/path. The different ...
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Site/DNS with subdomain to any private IP addresses? [migrated]

So several years ago I saw a DNS service which you could for example put something like: 192.168.1.2.<something>.io and it would return an A record for 192.168.1.2 You could put any IP address ...
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Cisco ACL to block external DNS queries [RESOLVED]

One of the routers that I administer is getting bombarded with external DNS queries from the internet. This is a network border router which has a DNS server configured. There is an interface facing ...
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36 views

Fallback to forwarding with Unbound?

I'm using Unbound on an internal network What I want it to do is as follows: If a local_zone matches, return from there If not and it matches the internal domain name, then try forwarding to Consul ...
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15 views

Internal routing of external port forwarded domain on router TP-Link TL-ER5120 [duplicate]

I have two internet access (one fiber one backup vdsl2), and I use a multiwan router to link them to the rest of my network. My internal network contain a server that is accessible from the internet ...
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50 views

Problems using local DNS server

I am trying to set up openbalena on a virtual machine, and it requires DNS records in order to be discoverable. I have set up bind9 like so: /etc/bind/named.conf.local // // Do any local ...
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59 views

Setting up dnsmasq as resolver for local domains, forward others to campus nameserver

I'm tearing my hair out trying to setup dnsmasq. I'd like to be able to resolve certain local domains (just as a test) to my own machine, and forward the rest to my regular DHCP nameserver that's ...
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Why can my Windows Server 2016 domain controller not register its records on an external BIND DNS server?

Background For lab only purposes, I've set up a Windows Server 2016 domain controller on my network in a new forest. My goal is to use a BIND9 DNS server for all of its DNS needs rather than using ...
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101 views

Local internet gateway and VPN Connection, which DNS takes precedence?

I am not network administrator but was a developer 15 years go. So bear with me if my networking understanding is rusty. I have a Win 10 Pro client with local internet connection (home) and a VPN ...
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Bind9 DNS server is getting connection timeout

I am setting a DNS server in my lab, where the DNS server (Ubuntu server) and client's(Ubuntu desktop) are in same LAN (vSwitch) and pfsense as firewall for external outgoing traffic. No block rules ...
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24 views

No DNS for Windows Server Core

I have set up an Active Directory with DNS Servers on the Domain Controller. I have already joined Computers and DNS works for all machines, even those that are not in the domain. I wanted to setup ...
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1answer
29 views

DNS resolving while working from home doesn't work accurate

In the current situation we are using VPN connections while working from home to get access to data in our company network. We are all using Windows 10 machines. We have some shared directories like "\...
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36 views

BIND DNS won't resolve CNAME to external domain

I'm trying to setup my own DNS server on my server 192.168.1.70. I want to be able to resolve my own names in my LAN but I want all other zones to be resolved by my router (192.168.1.1). Here is my ...
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45 views

Android appears to bypass firewall rule which restricts request for port 53

I'm trying to configure my Fios G1100 to force DNS request to my internal DNS server 192.168.1.131. This device runs Pi-hole, which is configured to make DNS request to 1.1.1.3 and 1.0.0.3. This has ...
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78 views

Pfsense and Dns Resolver - SSL/TLS for internal access?

I have a Pfsense box that is able to issue/renew acme certificates, with haproxy installed, that has two backend servers that use the generated acme certificate that works fine. (email and nextcloud ...
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98 views

Debian Samba AD DC: domain connected Win 10 can't connect to LDAPS

I've installed Samba 4.9.5-Debian with Active Directory role on Debian 10. The installation is configured with SAMBA_INTERNAL DNS backend. When I try to connect with LDAPS with domain connected ...
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How to create DNS entries on Windows Server, such that a single word (without a TLD) can be used to resolve an ip? [closed]

In the Windows Server DNS role, is it possible to create a DNS entry, such that all devices in my network (also those that are not part of the same domain) can resolve a short hostname (eg: 'test') to ...
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95 views

How to register RRAS VPN clients in DNS with DHCP doing secure dynamic updates?

A past MSP configured our Windows servers (2012 R2) like so: SERVER01 (10.0.0.1): DC + DHCP + DNS SERVER02 (10.0.0.2): RRAS DHCP is handing out IP addresses in the 10.0.0.50-240 range. DNS is ...
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57 views

Adding a new DNS server with systemd-resolved

To access other machines on my network by their name, I have to add the following two lines to my /etc/resolv.conf: search foo.local nameserver 192.168.X.Y But any changes I make do not persist ...
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42 views

Public CNAME to private internal domain doesn't work

Public name server (controlled by me, I own example.com): private.example.com. 300 IN CNAME myserver.home. Private name server (some auto-config voodoo, can't modify this record): myserver....
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47 views

OpenShift routes vs Kubernetes ingress and creating new local DNS names?

In Openshift I am used to expose my service outside the cluster through a route. That will automatically create a new "domain name" that I can use to access my application from e.g. my local PC on the ...
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119 views

Can't resolve internal names over P2S,S2S in Azure

For some reason, our DNS resolution does not work correctly over SSTP VPN or S2S connection in azure. Everything works fine directly in the Azure environment. Additionally, I get the correct DNS ...
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119 views

AD for multi-site, with zone-transfer and local DNS entries

We have multiple sites in NV, TX, PA and NY. NV site is the primary site with AD and DNS server for all the users/hosts in NV. NV is also connected to TX, PA and NY through VPN. Currently, TX, PA and ...
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166 views

OpenVPN Default DNS on Windows Clients

I have set up an OpenVPN Server on a Debian9 device so that my company can reach our server infrastructure from the outside. I'd like them to use hostnames to reach the servers so I've set up Bind9 as ...
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1answer
100 views

GCP: How to do DNS Peering between 2 VPCs that use VPC Peering in the same project

In Google Cloud Platform, how do I set up private DNS Peering between two VPCs that are connected with VPC Peering, but reside in the same project? I have one project my-project and two VPC networks: ...
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1answer
81 views

Why create a reverse DNS record for every device that connects to a wireless network?

There's this network I connect to often. After some experimentation, I figured out that when you connect to the network, the DHCP server assigns you an FQDN that usually follows the scheme <your-...
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2answers
229 views

DNS query response of “No such name”, but client can ping the domain name

Basically I issue a query (Type: PTR) from my client for the following _some-service._tcp.gv.com In response to that query, I get back Reply code: No such name (3) According to this question and ...
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62 views

How can SSL work with “subdomain” but not “subdomain.subdomain.domain.com”

I'm investigating an SSL setup and Chrome says the cert was issues to, subdomain.subdomain.domain.com but if I visit that URL I get the "Cert Invalid" warning". Yet, if I visit "subdomain" directly, ...
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2answers
129 views

Resolving Kubernetes service via internal DNS server - Bare Metal

I have a kubernetes cluster running w/ 4 nodes, my main master node plus for other nodes. I used kubespray to get everything running. This is on my home network, which I will explain down bellow. ...
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88 views

mixing external and internal DNS servers for AD joined machines

I have a question. Many of our clients have only one DC. Is it better to use external DNS (ISP,or google) as the secondary DNS server for AD-joined machines or set up a conditional forwarder in the ...
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1answer
20 views

External site redirects www to non-www. This causes a conflict inside our network. How bad is my idea for a fix?

Our network has a domain named after our business: business.com. Our new website has just been finished and is live, but the developer has chosen to redirect all www traffic to the non-www URL; so www....
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1answer
652 views

How to configure OpenVPN to update Bind9 entries for local domain?

I have found an article describing how to configure dhcp3 server to update a Bind9 zone with the hostnames and assigned ip addresses. I want to achieve the same effect, but inside a VPN subnet, where ...
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63 views

dnsmasq DNS cannot be reached by local devices

I am currently working on a locally hosted website running on the free version of MAMP. I wanted to assign this website a domain name, hence i came across dnsmasq. I have set up the program using ...
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51 views

Subdomain with all digits seems to be messing with /etc/hosts file

I have a /etc/hosts file that has something like this line for 127.0.0.1 for hostnames I'm using for development sites: 127.0.0.1 localhost site1.example.com site2.example.com site3.example.com I ...
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86 views

Is 127.0.0.1 OK as an IP for local development across Windows/OS X/Linux?

I'm building a tutorial (Flask web development) that students work on using a variety of operating systems. I'm mostly an OS X user, so I obliviously configured the app host to be 0.0.0.0:5000 and ...
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1answer
119 views

How can you resolve different DNS entries depending on the source subnet?

I have a new internal website going in place in multiple sites and I am looking to resolve the fqdn for it to the site specific subdomain depending on the source subnet used. The way our bind DNS is ...
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1answer
66 views

Adding a private nameserver to public DNS zone for a subdomain

We have a DNS zone setup on Azure which resolves all of our records on our base domain (eg: example.com). We also have an internal DNS server using BIND and are currently duplicating the records on ...
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3answers
74 views

How to “add” some A records to a “3rd party” DNS zone (using BIND)? [closed]

So, I'm not sure how to word the question exactly, but here's what I'm trying to do... (I'm trying to do this with BIND.) My company has it's own internal name servers. Let's say that they are ...
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1answer
100 views

PowerDNS - Glue record returns servfail

So I've been in the process of setting up a PDNS Recursive and Authoritative server for an internal network. The recursive server runs on port 53 and the authoritative runs on 5300. Requests are ...
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2answers
168 views

DNS caching - iterative vs recursive

In an iterative DNS architecture , local DNS servers have caches and can mostly skip contacting root and TLD servers. In a recursive schema, the local DNS server contacts one DNS server which ...
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42 views

Discarding A record responses - when querying a DNS entry returns both A and AAAA records

I have a linux system with both IPv4 and IPv6 addresses. I want to reach an external system by way of a DNS entry. This DNS entry returns both IPv4 and IPv6 addresses (A and AAAA) Is there ...
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1answer
24 views

Setting up another domain controller with Active Directory, Group Policy, DNS

I was wondering if anyone could give me advice on setting up another domain controller. Our environment has one and we're looking to add a second one. I haven't set one of these up before and am ...
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37 views

Docker Swarm DNS orphaned IP address

System information: Docker Engine Version: 17.06.2-ee-6 My team and I have been observing peculiar behaviour in our Docker cluster recently, where a REST request to a service (here: myservice) has ...
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1answer
255 views

NGINX reverse proxy in front of docker containers

How do we get NGINX reverse proxy to proxy_pass into the right IP/resolve the container's hostname? I get the notion that resolver pointing to an exposed Docker-embedded DNS is ideal. Context: ...
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1answer
42 views

Configuring Active Directory Domain Services in a network that has Univention DNS Servers

I've been tasked with the creation of an ADDS forest (single domain, for now) and after reading best practices, i decided to name the domain ad.mycompanydomain.com. Two Univention Corporate Server ...
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1answer
250 views

Is it possible to force update of Route53 DNS resolver cache in AWS when IP changes?

I have several VPC's set up in AWS, and all of my instances use provisioned IP addresses, that is - not using Elastic IP Addresses. When any given instance boots up, it executes a script on the ...
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21 views

BIND9 Slave server not resolving but replicated zones are fine

Today the master dns server of an internal network subdomain failed and the slave server cannot find names in the replicated zone Querying the server nslookup ns1.sis.trt 10.3.190.61 Server: 10....
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2answers
289 views

Azure DNS - On Prem to Azure via VPN - Keeping things internal?

We have a VPN that connects our onsite network to an Azure VNET. We want to delegate a DNS subdomain from our onsite DNS to our Azure DNS. If we use the Azure public DNS then we are given four Azure ...

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