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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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1answer
20 views

Bind9 DNS does not work Ubuntu 18.04

I can't get my BIND9 server to work for internal name resolution. My clients always get an external IP back. I guess the internal fails and I get redirected out and someone has homenet.com for ...
0
votes
0answers
36 views

private domains redirection for members of AD: DNS or something else?

I'm looking to obtain the same consequences of having a line server_ip domain_name (eg., 192.168.154.21 mywebsite.com) in the file hosts (/etc/hosts or %system32%/drivers/etc/hosts) but for all (or a ...
0
votes
0answers
21 views

Cannot access domain on local network

I've recently moved our website to a new external server, but I can't access the site via the domain internally. You can access it via the IP address, but not from the domain. I've checked the DNS ...
0
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2answers
26 views

Exchange server in the cloud on a (test) private network

We are looking to setup a test e-mail environment in the cloud using Windows Servers (Active Directory servers and Exchange Servers) and some Windows Clients (Windows 10 computers with Outlook ...
1
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1answer
53 views

In a local domain can I correct a DNS record by only changing the A record?

I added a server to my network using the same name of a previously decommissioned server. But the new server has a new IP address. I deleted the old computer in the AD and the new server added ...
0
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1answer
38 views

Public DNS conflicts with Networks internal DNS [duplicate]

we are focussed on building websites/webservices for quite a few years now and right now in discussions with the company which manages a companies network. I just can't believe what they are telling ...
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1answer
37 views

Windows machine with 2 NICs

I have 2 networks connected to my work PC, we'll call them NET1 and NET2. NET1 has internet access and NET2 doesn't. NET1 is a work network which I have no control over. My work computer is ...
2
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0answers
35 views

Windows domain username formats? NETBDOMAIN\USERNAME and DNSDOMAIN.COM\Username?

I'm running into issues with authentication and mapped network drives across a VPN tunnel. Namely error messages related to not being able to find a domain controller. I suspect this is somehow ...
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1answer
27 views

wildcard sub domain internal URL rewrite

I am trying to achieve URL like GitHub Pages. whenever user will visit username.example.com internally it will respond from localhost:80/username I am giving some example So that it will make the ...
0
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1answer
2k views

Unable to connect Windows Server 2012 R2 to a Domain Controller. Getting Error

I am unable to connect Windows Server 2012 R2 to a Domain Controller. Getting Error, An Attempt to Resolve the DNS name of a domain controller in the domain being joined has failed. Please verify the ...
1
vote
2answers
87 views

Is it possible for Windows clients to carry out external queries through an alternative DNS server directly?

Our Windows domain is far away. DNS performance is affected. Would it be possible for Windows clients to carry out external queries through an alternative DNS server directly? I understand this is not ...
0
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0answers
30 views

How to configure domain trust and DNS to share content with an external domain?

I have two domains (same LAN subnet) lab1.tld & lab2.tld I configured a one-way external trust (with selective authentication) for those domains plus a secondary DNS zone pointing to the "opposite"...
0
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1answer
40 views

network (with defined IPs) in another network (with DHCP) - connection issues

We develop a client-server application where the server needs to be available with a known IP-address. Therefore, we configure router and PC with defined IP-addresses. This works fine, as long as ...
2
votes
2answers
49 views

Multiple hostnames for a Synology NAS in local network

Is it possible to set up a Synology DS918+ NAS (which is just a Linux system) to be accessible via http://diskstation.local and http://laura.local at the same time? I have set up a reverse proxy on ...
1
vote
1answer
62 views

Odd Behavior of DNS forwarding with SRV record resolution

I'm running into a weird problem while setting up a new SAMBA AD DC on my network. I've got the DC itself up and running and checked on the server that I am able to resolve the DNS name of the server, ...
0
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0answers
25 views

(BIND9) Domains within certain Zone stop resolving randomly / intermittently

I've been stuck for a while with an error related to bind9 and particular domains within a zone. Sometimes the resolution of one or more random domains within the zone ("errorzone", let's say) stops ...
1
vote
0answers
41 views

Dynamic DNS, basic configuration not working

I'm trying to implement DDns, where DHCP daemon updates dns records instead of myself. From what I understand, it should work. But it doesn't. I would be very grateful, if somebody points out my ...
0
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2answers
39 views

Bind - Resolve two domains with a single server

I need a bit of help with BIND (Centos 7.5) Bit of a back story: We are running two domains on the network. One called company.domain.com and one called comp.domain.com company.domain.com has ...
2
votes
1answer
41 views

How to identify the server providing a DNS response?

TL;DR: Where, in a nslookup www.somedomain.com -debug will I find the name/IP of the server(s) which reply to the chain of queries? Details: I have a setup (Windows 10 machine) which is connected ...
1
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0answers
61 views

Setup DNS Forward Server to forward only specific domains

I want to setup DNS Forwarding Server to forward DNS resolution requests for only specific zones. I am using the following config. acl "trusted" { localhost; 10.x.x.x/24; }; options ...
4
votes
1answer
46 views

Valid SSL certificate for domain/subdomain pointed at a private IP address

This is related to a question I saw here where the OP asks whether you can point an A record to a private IP address. So it seems like you can but I have a further question... If I create the ...
1
vote
0answers
198 views

Unbound config to forward unknow local subdomain name

I am currently on a local aera network where no loop-back is allowed meaning that I cannot reach my public IP address from the local network. Several services need to be migrated in my local area ...
1
vote
1answer
81 views

Resolve specific Domain query using View in BIND9 (Forward)

I am trying to setup a whitelisted domain forwarder in my bind9 but it wasn't successfully accomplish maybe due to the configuration that I applied. A couple months ago, I did setup the same ...
1
vote
2answers
229 views

Can BIND setup with only A names and fully qualified host names work properly?

I recently came across a zone file for BIND which used only Address records with fully qualified domain names for each IP. Example snippet: subdomain1.example.com. IN A 192.168.1.10 subdomain2....
0
votes
1answer
33 views

Different authorize servers for DNS “A” record and “MX” record

Can we use different authorize server to host A and MX record. Let I want that my internal DNS server should be authorize for "A" records only and when an email is sent and there is need for MX record ...
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1answer
103 views

DHCP: Advertise DNS Server with port (not 53)

In my network I have a small docker swarm running several apps. Latest I tried to setup two new services offering DHCP with ispcpd and DNS with unbound to the network. Master of the swarm is a new ...
6
votes
1answer
323 views

Exposure of hidden-master stealth DNS server on public-facing authoritative slave

In a typical hidden-master DNS network layout, there are basically two components: Hidden master DNS server, may be behind a NAT or firewall, or be totally exposed Slave authoritative non-recursive ...
0
votes
1answer
199 views

HAProxy doesn't automatically reload DNS

I've installed HAProxy 1.7.5-2 on a Debian Stretch (9) for a blue/green deployment infrastructure. HAProxy is setup in TCP mode and reloads DNS every 5 seconds but it doesn't. global log 127.0.0....
3
votes
1answer
126 views

dnsmasq: one domain, half private, half public?

Our internal office network has the same top-level domain as our company online presence, e.g. ourdomain.com. For the outside world, any public hosts (eg. blog.ourdomain.com, download.ourdomain.com, ...
5
votes
1answer
151 views

Large AXFR through dnsmasq causes dig to hang with partial results

I'm attempting to set up dnsmasq as a local cache for consul. While this seems to work fine for normal digs, dnsmasq seems to only allow partial zone transfers. My resolv.conf: search x.domain.com y....
0
votes
1answer
85 views

Samba Secondary DC,No DNS Forwarding

I'm new to Linux and testing Samba AD DC. I've set up 2 DCs. DC1 is able to resolve google.com, DC2 is not. nslookup google.com 192.168.0.100 Server: 192.168.0.100 Address: ...
1
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0answers
241 views

Dynamic DNS client records not being updated correctly

Our network is running Windows and macOS clients all of which are joined to Active Directory. The Macs are all running Windows via Bootcamp. We were having issues which were being caused by our macOS ...
0
votes
1answer
173 views

All DCs fail DNS:RReg test, Reports SRV Records Missing on PDC - They are present

Background We are currently in the process of doing several Domain Controller upgrades. Before I started here a previous Admin had started the process of moving our DCs from 2008 R2 Standard to 2008 ...
0
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3answers
35 views

Using OpenNIC but can not connect to local domains

I am using the service OpenNIC for my DNS. This works fine. However, when using OpenNIC I am unable to connect to local domains. Example: $ ssh example.com Works! $ ssh my-computer.local No ...
1
vote
1answer
154 views

Should I manage SRV records for my Windows Server DC manually?

I have Microsoft AD Domain with multiple geographical sites. All sites are interconnected by VPN. All sites have 2 Domain Controllers running Windows Server 2012 R2. I was reviewing the automated ...
1
vote
0answers
67 views

DNS-RPZ use for nonexistent addresses

I'm trying to find a scheme where I can use a generic UI app to automatically access some local IoT devices I'm making, no matter the domain in which they are installed. Yes, I know IoT is just an ...
0
votes
1answer
63 views

Microsoft DNS behaving strangely

I'm having this peculiar issue with Microsoft DNS. Basically, we have domain.com that's a split horizon setup (external public DNS and internal DNS are both authoritative for separate zones), don't ...
0
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0answers
31 views

Split horizon with automatic forwarding

any a idea how i can setup an Split Horizon Bind DNS with automatic forwarding to the external View? my current setup is this: /etc/named.conf file include "/etc/myrndc.key"; controls { ...
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votes
1answer
366 views

How to connect to local servers by hostname? [closed]

I have a Ubuntu server and Centos server installed on VMware on my Windows 10 PC for testing. I don't have any domain names registered and using cable internet so my IP is dynamic. Centos server's /...
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votes
2answers
56 views

Resolv to CNAME not to A record

At the data center of the university I work, we have a DNS system, that we use for registering the names of our servers and the addresses of the services that are meant for internal use only. Usually,...
0
votes
1answer
542 views

Split DNS and internal port forwarding

I have a pfSense firewall running in a pretty standard configuration, 1 WAN, 1 LAN. On both sides of the pfsense I'd like to make available a service via DNS name, lets say "service.domain.com". For ...
0
votes
2answers
577 views

Kubernetes Pod DNS Resolution

Currently able to resolve all services to IP addresses and telnet and ping them. Unable to resolve pods to IP addresses. Though can lookup pod IP addresses with kubectl and telnet and ping them. How ...
0
votes
1answer
38 views

Redirect email to different domain

Is it possible to use the LAN DNS to redirect an email to a different domain? i.e. if I want to send emails to the domain name this.longdomainname.co.uk on a regular basis I could setup my DNS so ...
4
votes
4answers
2k views

Windows 10 Always On VPN, Split DNS, NRPT, and how to configure which DNS server is used?

Here's the setup: Windows 10 1803 clients Server 2012R2 RRAS server Always On VPN device tunnel setup per these instructions, with split tunneling. Device VPN only has routes to 1 DC/DNS server, and ...
0
votes
1answer
193 views

How to resolve dns in multiple name servers?

resolv.conf domain example.com nameserver 192.168.122.54 nameserver 192.168.124.44 Take this as the sample resolv.conf. The scenario is that the DNS tries to resolve in the first name ...
0
votes
0answers
32 views

Mac administration - local reposado server for internal & external clients

I'm a relatively new Mac admin at a small (but growing) startup and I'm trying to get a few basics set up. The company has three physical sites and each site has a mix of about 5-10 iMacs and MBAs. ...
0
votes
0answers
107 views

NDJBDNS setup on Centos - Dig @127.0.0.1 times out

I'm in the process of replacing an old Gentoo DNS setup (running DJBDNS) with a CentOS 7 one, and have decided to go with NDJBDNS since it appears to be the most modern implementation of TinyDNS. ...
2
votes
3answers
435 views

DNS Entry to Re-Direct WU to WSUS for non Domain Devices

A little background, I'm not a systems administrator but overheard ours discussing this very issue and wanted to do some looking into it myself. We run an internal network with numerous VMs (and some ...
0
votes
1answer
200 views

DNS record with same name for A and NS record types

I am not sure of this but was trying to understand if the two DNS records of the record of 'A' and 'NS' type can have the same in the domain? like: A.m.b.example NS -> [ NS servers ] A.m.b....
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2answers
291 views

Running custom DNS on EC2 instances

I am trying to design a Enterprise Hybrid DNS architecture, similar to this blog article: https://medium.com/statuscode/hybrid-dns-for-the-enterprise-in-aws-5ba5a049bcb1 In summary there is an on-...