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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DNS Record to "redirect" from old server to new server

I have a question regarding DNS: I have the following setup: srv-old.example.com | Host(A) | 192.168.1.2 | timestamp srv-new.example.com | Host(A) | 192.168.1.3 | static can I just add another ...
StartedFromTheBottom's user avatar
1 vote
1 answer
523 views

BIND9 - dig is unable to resolve from different server

$ named -v BIND 9.16.1-Ubuntu (Stable Release) <id:d497c32> I have 3 servers configured in digitalocean nyc1 all in the same subnet on server01 - I have installed bind9 and configured the zones ...
rrag's user avatar
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How to get private Elastic-Beanstalk Environment DNS Endpoint?

My setup is the following: i have a VPC consisting of 3 subnets: public, private with NAT and isolated. I have an elastic beanstalk (single instance) environment running in the private subnet with Nat ...
Maximilian Körner's user avatar
1 vote
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how to make unbound hold many queries for non cached address to cache it first

I am looking for a way to make unbound hold queries for the same address lookup when it is not cached. It should let only one query to be processed, after that answer cached it can reply other queries ...
Çiçek Adam's user avatar
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ISC DHCP/DDNS setup: Static entries for non-dhcp clients

I have set up a local network with ISC BIND9 and DHCP service. New leases trigger the DHCP to add an A and PTR record which works perfectly. I also added lots of static host entries in the dhcpd.conf. ...
dom's user avatar
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Windows Server DNS Server Failure

I am having some issues with Windows Server 2022's DNS resolution and was hoping to get some insights. I have included some screenshots throughout the post The server in question is running on HyperV, ...
Swemoph's user avatar
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DNS best practice for large resilience orientated org

I have been asked to investigate the resiliency of our DNS and it's config. What's the industry best practice around this? The following have been suggested: the DNSAdmin group (which is usually ...
JSUSZ001's user avatar
2 votes
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Unable to resolve private dns zone over vpn with bind9 DNS

The Problem I have a VPC in which I need to access the servers using private FQDNs. The VPC is accessible through a wireguard VPN. The VPN server also serves as a DNS server running BIND9. I have set ...
Arnaud Songa-Côté's user avatar
1 vote
1 answer
229 views

Weird Active Directory DNS Issue

I am having a DNS issue I cannot figure out. For one specific hostname, when I create an A record, the name ends up changing when it replicates to the other DNS servers in AD. We currently have two ...
shaunmccloud's user avatar
1 vote
1 answer
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Container DNS resolutions works only after restarting dnsmasq

[Update] add software versions I have a home server which runs docker and DNS/DHCP for my home network. It's all working quite nicely except for one thing: Containers can't do DNS resolution after ...
flypenguin's user avatar
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Forward DNS local to Jira URL

I want to redirect my old helpdesk domain Help.company.com to Jira URL ( Company.atlassian.net/Jira/Helpdesk), it's a simple forwarding and don't want to keep the old URL . I tried to do a CNAME but ...
Anis Heni's user avatar
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How are external url's resolved by FreeIPA?

We are running FreeIPA version 4.6.8 on Centos 7.9.2009 and have multiple dns zones defined for local resources running inside our private network. For this to work we enter our ipa server's IP ...
Bob C.'s user avatar
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1 answer
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Why the IP cannot be used directly when the IP mapped to the host name as a host entry works?

I was given an API for a service through which I tried to send a post message from server A, but the connection cannot be built. Then I ping the domain name in the API. It doesn't work, so I thought ...
Lerner Zhang's user avatar
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BIND9 DNS Issue : connection timed out; no servers could be reached from outside network

I am learning Bind9 and have setup Bind9 on Ubuntu 20.04.3 LTS Here is named.conf file options { directory "/var/cache/bind"; listen-on { any; }; listen-on port 53 { any; }; ...
Siddhpura Amit's user avatar
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Creating a sub domain of our public domain for corporate/internal Active directory use. The public domain is also our Office 365 and Azure domain

Our current internal AD domain is example.local (set up long before I joined our team when this was a best practice) Our Office 365 domain is a public, registered domain with GoDaddy which we use for ...
Sharyn S's user avatar
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654 views

NGINX access module and internal DNS: How to allow only local clients

I searched through serverfault but couldn't find an answer to this. Maybe I just don't know the right keyword or it's a conceptual misunderstanding. Any help would be appreciated! The situation: My ...
Niklas Dada's user avatar
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Using a Dockered Unbound DNS server as a resolver for other containers

I'm using Unbound DNS server as a resolver for my home LAN. It runs as a Docker container on the default bridge network and in general it works as I'd expect it to, except when trying to use it as a ...
zire's user avatar
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1 vote
1 answer
669 views

Is it possible to have both static and a dynamic A record created for the same host on an internal DNS server?

I am working on a case study related to risks from insecure dynamic DNS updates. Suppose there is an internal DNS configured that has a mix of static and dynamically created addresses. Consider a ...
Impossible's user avatar
1 vote
0 answers
287 views

Why Firefox doesnt work with split DNS / Host Overrides?

I have configured Host overrides in pfSense and other browsers like Chrome and Edge work fine but Firefox simply does not resolve giving "Unable to connect" error. This is the same on my ...
DominicM's user avatar
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Obtain Let's Encrypt SSL Certificate for Internal Server on Internal DNS Server

I currently run an organization and we use a internal website that is hosted within our network that runs a Gitea Server so that we are able to access important documents without having to rely on a ...
Joe's user avatar
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How I can configure my local machine to use a docker hosted dns server alonsside with ant other dns settings for specific domains?

I have the following docker-compose.yml used as php web app local solution: version: "3.1" services: nginx: image: nginx:1.13 volumes: - "./configuration/nginx.conf:/...
Dimitrios Desyllas's user avatar
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1 answer
179 views

How to make a domain name resolve to the same IP address as another domain name?

I have a AWS ELB to the gateway of an internal service. I have some other host names that I need to be resolved to the same address as the ELB DNS name. In my current set up, I'm using /etc/hosts to ...
Satoru.Logic's user avatar
-1 votes
1 answer
940 views

PowerDNS Auth and Recursor - Bug with one domain?

I have a problem with one of my domains on my private DNS. I have two servers. Server 1 with dnsdist. It directs to port 54 to server 2 Server 2 with powerdns (port 53) and powerdns-recursor (port 54) ...
onee's user avatar
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-1 votes
2 answers
930 views

How to test DNS change on Mac before go live? [closed]

I need to test DNS changes before updating real DNS I need to set up A records and CNAME Any Mac software that let me do it and possibly easily switch ON / OFF?
al404IT's user avatar
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Router with vpn client do not forward dns requests to the connected devices

I have a problem with my router forwarding dns requests to it's clients. My setup is as follows. I have an ISP provider configured on my router and a vpn client connected. In the vpn's network there ...
Julian Dimitrov's user avatar
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1 answer
1k views

Get all hostnames in local DNS for current Windows server

I've deployed BGInfo from SysInternals to all of our servers, both physical and virtual. However, a few of our servers have multiple hostnames to support "backward compatibility" with some ...
G_Hosa_Phat's user avatar
1 vote
1 answer
2k views

NFS not allowing hosts specified in config to mount share

I am having an issue where NFS is refusing to allow hosts that are specified in the config file to mount the share. I am running an NFS server on Debian 10, BTRFS filesystem. my /etc/exports reads: /...
james's user avatar
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873 views

How can I force Active Directory integrated DNS to only return SRV records for specific domain controllers based on the subnet of the client?

I have a set of several offices joined using various combinations of IPsec VPNs and an MPLS network. The majority of sites form a mesh arrangement using the VPNs, but site B only has a single IPsec ...
Daniel Arkley's user avatar
2 votes
0 answers
160 views

SBS 2011 DNS server doesn't resolve forward lookup zones

I recently started a new job and inherited an antique in an SBS2011 server (yes, I know all the security risks and have raised this at EVERY management meeting). I have an issue with the DNS not ...
Jim D's user avatar
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2 votes
2 answers
4k views

named/bind is refusing to serve some domains after resolving them itself

Why is bind refusing some of my queries? This only happens for certain domains. A query through named fails: $ dig -t A fedoraproject.org @127.0.0.1 ;; ->>HEADER<<- opcode: QUERY, status: ...
Matt Clark's user avatar
0 votes
1 answer
793 views

How do I create DNS entries for private addresses on AWS?

To do any ops work on our servers, we first need to ssh into a DMZ server with a public IP, before ssh-ing on to the app servers, with ips such as 172.16.3.239. I would rather have memorable hostnames,...
oligofren's user avatar
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63 views

Web server, firewall and active directory: internal network connection error "DNS rebinding attack"

I have a problem with a web server (WS) (apache on ubuntu 20.04 server), Fortinet Firewall (FF) and windows Active Directory (AD). My ISP recently upgraded my Internet connection and changed some ...
erotavlas's user avatar
  • 101
0 votes
2 answers
266 views

Windows 10 / Chrome: HTTP browser request to IP address differs from same request to hostname

Agaoin, this is on Windows 10. I'm bringing in a new Ubuntu test web server (hpmicro1.lovelady.com) to our internal network, which is all in the lovelady.com domain. There's a DNS server on another ...
Dennis 's user avatar
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1 vote
1 answer
109 views

Balancing with MX records - How does this work?

enter image description hereplease can you help me with this, I have this scenario to balance email traffic, currently, most of the emails are going towards imail2.test.com.pe and imail.test.com.pe ...
Anthony J. B.'s user avatar
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2 answers
2k views

Docker macvlan drops UDP (DNS) traffic, TCP works

I'm trying to use macvlan to create a container that is a first-class citizen on my lan. I'm using a static IP (although I understand that using some 'tricks' it's possible to use DHCP as well). I ...
user avatar
3 votes
0 answers
2k views

dnsmasq: How to set alias domain / multiple DNS suffixes for local hostname resolution?

Is it possible to set multiple search domains via dnsmasq/DHCP? Due to some migration, I need multiple clients to be able to: ping server.old-domain ping server.new-domain # both should work, .old-...
ramo's user avatar
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0 votes
3 answers
605 views

Designate installation on OpenStack failed

While trying to install designate on OpenStack Victoria on Ubuntu 20.04 using this guide https://docs.openstack.org/designate/victoria/install/install-ubuntu.html I'm getting this error Updating Pools ...
Bilal Yahya's user avatar
1 vote
0 answers
276 views

NETLOGON trying to register with incorrect DNS server?

So, I have a Domain Controller DOMAINSERVER, and a second domain controller DS1. They are part of the domain office.mydomainname.com, and all was well in the world; DNS server was working great, ...
Tsaukpaetra's user avatar
0 votes
2 answers
3k views

Can't resolve external DNS record for domain in Azure Private DNS Zone

---EDITED TO REFLECT THE FACT I'M RUNNING MULTIPE COPIES OF THE APLCIATION ON THE ONE DOMAIN---- Having an issue that I can't quite work out, wondered if some fine person here had any experience! I'm ...
Chris Butler's user avatar
0 votes
2 answers
251 views

Does AWS Route 53 private DNS work with Latency Based Routing?

Looking to setup a private DNS hosted zone in AWS Route 53. I would like to know if this configuration supports Latency Based Routing.
BillMan's user avatar
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Wouldn't setting the DNS server to 127.0.0.1 prevent my system from actually resolving remote hosts? I found this answer

Wouldn't setting the DNS server to 127.0.0.1 prevent my system from actually resolving remote hosts? My business email server has the DNS set to the ISP given DNS servers. My Spamassassin is giving ...
Altimus Prime's user avatar
1 vote
0 answers
129 views

Embed HTML resources from internal network within a public https page

We have a website for internal use only which however is hosted publicly on a regular internet domain, and it’s secured with https protocol. However, the page contains http(s) links to resources (...
Demis Palma ツ's user avatar
0 votes
1 answer
587 views

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 ...
Rhangaun's user avatar
  • 189
-2 votes
2 answers
1k views

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" { ...
G. Attila's user avatar
0 votes
1 answer
478 views

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 ...
daz249's user avatar
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1 vote
0 answers
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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 ...
James V's user avatar
  • 11
-1 votes
2 answers
2k views

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....
filimonic's user avatar
  • 323
1 vote
2 answers
190 views

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 ...
Keep's user avatar
  • 21
1 vote
1 answer
94 views

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 ...
VR-4's user avatar
  • 11
0 votes
1 answer
350 views

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 ...
shehan's user avatar
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