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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.

856 questions
238
votes
10 answers

List all DNS records in a domain using dig?

My company runs an internal DNS for mycompany.example There is a machine on the network that I need to find, but I’ve forgotten its name. If I could see a list, it would probably jog my memory. How can I list all of the domain records for…
Runcible
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29
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4 answers

Difference between /etc/hosts and /etc/resolv.conf

What is the difference between /etc/hosts and /etc/resolv.conf? Also, is there a good documentation that explain all these configuration files. Thank you. Bala
Boolean
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27
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5 answers

How do I determine what my DHCP server is?

I have a sad network left behind by some careless administrators - I am in the process of figuring out exactly what services are running where, not excluding the possibility that some services are running from two places at once, which is tons of…
Manca Weeks
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24
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13 answers

Using .local for internal websites

Is it okay to use app.mycoolname.local for URLs that are private / internal? We have several applications that are web based, but they are private apps and are not exposed to the public. We have been using ".net" for some of these, which doesn't…
Brian
19
votes
2 answers

Multiple reverse DNS record internal DNS

A user was having trouble connecting to the internet, some sites worked some sites did not. I do not think it has anything to do with networking gear, but just in case. 2 firewall, Palo-Alto 4 Cisco Nexus 55XXT Switch We did not make any network…
Anthony Fornito
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16
votes
4 answers

DNS A record pointing to private IP address

I own a domain. I will call it example.com. I want to set up a local BIND server on my private network. I have a box with the private IP address of 192.168.2.13 I would like to have this box named development.example.com, Is it considered normal…
Ryan
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15
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2 answers

Should engineering have its own DNS zone, delegate, or subdomain?

We have our organization's primary domain (with AD) example.com. In the past, previous admins have created several other zones - such as dmn.com, lab.example.com, dmn-geo.com etc - as well as subdomains and delegates all of which are for different…
Thomas
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14
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5 answers

Querying DNS for CNAMEs for a server

Is there a way to query our internal DNS entries to discover all the CNAME entries that point to a particular server? Edit: We're a Windows environment, Server 2003.
PhilPursglove
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13
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1 answer

What is the point of the zones.rfc1918 file for Bind9?

Using an Ubuntu 10.04 LTS server in a standalone environment and trying to use views to serve two different subnets of clients. Getting errors regarding the zones.rfc1918 file, so I'd like to know what that file is used for. What's the point of…
romandas
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12
votes
1 answer

SSL Server name mismatch how to bypass ie11

We have an app and the really long story short is that things have to be setup this way in order for the rest of the app not fail. We have a domain https://server01/AppNet In IIS the 443 binding is setup to use a cert with: CN=server02 When I hit…
Anthony Fornito
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12
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3 answers

unbound/nsd returning SERVFAIL resolving local LAN DNS. nsd alone works fine

I've been using unbound as a local recursive DNS server. Just added nsd to set up local LAN DNS. nsd is listening on port 53530 and that works fine: $ dig @127.0.0.1 data2.datanet.home -p 53530 ; <<>> DiG 9.9.2-P2 <<>> @127.0.0.1 data2.datanet.home…
Micah Yoder
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12
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4 answers

Don't automatically include all subdomains in DNSMasq address

It is possible to configure DNSMasq such that it returns a fixed IP address only for a request for that exact domain, and not for its subdomains? That is, I want it to return a fixed IP when resolving example.com, but not a.example.com,…
Michael Mrozek
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12
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2 answers

Hosting multiple domains on a single email server with one IP

I have an email server (mail) that currently hosts one domain example1.com. The server is behind NAT and I have split-dns configured on the LAN. The time has come to host additional domains on the same email server and after many hours of googling I…
joshu
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11
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4 answers

Two Different Domains & Domain Controllers on Single Network

I'm attempting to determine whether it is possible to have two Active Directory domain controllers running on the same network, within the same subnet, with two separate domains. I do not want these two domain controllers to be linked in anyway…
BSchlinker
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10
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2 answers

Should our small office have internal DNS servers?

I administer a small office (<50 people). We have always had internal DNS servers in the office. DNS servers are pretty straightforward, but we have run into trouble with them in the past. We have some office resources that are only available in…
Aaron R.
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