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56
votes
6answers
3k views

Choosing between meaningful and meaningless hostnames

Assume an environment with a puppet-managed cluster of different servers - various hardware, software, operating systems, virtual/dedicated, etc. Would you choose meaningful hostnames ...
52
votes
14answers
29k views

Top level domain for private networks?

On our office network we have an internal DNS and all the hostnames are whatever.lan. On my VMware VMs, on their host-only network I call them whatever.vm. We now have a private IP space network in ...
39
votes
6answers
69k views

List all DNS records in a domain using dig?

My company runs an internal DNS for "mycompany.com" There is a machine on the network that I need to find, but I've forgotten it's name. If I could see a list, it would probably jog my memory. ...
13
votes
2answers
857 views

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 ...
9
votes
13answers
8k views

Using .local for internal websites [duplicate]

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 ...
7
votes
4answers
28k views

How do I determine what my DHCP server is?

I have a sad network left behind by some careless admins - I am in process of figuring out exactly what services are running where, not excluding the possibility that some services are running from ...
7
votes
4answers
1k views

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.
6
votes
1answer
4k views

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 ...
6
votes
5answers
3k views

Resolving host names to their domain name in an internal BIND domain

I'm setting up a domain on my home network for learning purposes, using BIND on CentOS to act as the name server. I've got the name server up and running as type master for my internal domain ...
6
votes
3answers
4k views

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 ...
5
votes
8answers
12k views

Is there a reason to use internal DNS over 8.8.8.8?

I've inherited a LAN where there is really no name resolution being done for local resources... i.e. all users enter IP addresses manually to access printers and network shares. There are no LDAP ...
5
votes
6answers
3k views

How to intercept and manipulate DNS queries?

I'm not sure if I worded the question correctly to be honest but basically what I want to do is: When a user types in something like Expenses in the URL bar of a browser, I want the browser to be ...
5
votes
2answers
138 views

Run local dns-server that forwards dns querys to different dns nameservers

I would like to run my own local dns-server, that forwards only some dns-queries to special dns-servers and all others to the public google dns servers. The database of the local DNS-Server should ...
5
votes
1answer
1k views

IPv6 over Cisco IPSec VPN?

We use a Cisco ASA 5505 as the firewall and IPSec VPN endpoint on our network. We use split-tunneling to reduce the load on our internet link. In other words, when someone is connected to the VPN ...
4
votes
2answers
4k views

Override a DNS record using BIND9?

Sorry if this has been asked before, but I can't seem to find any information specific to my case. I run a server where users can connect with a Nintendo DS game if they change their DS' primary DNS ...
4
votes
3answers
443 views

Do we need a DNS server when we use OpenDNS?

I am in the process of splitting roles up from one server to 5. The current server is running as a DNS server, among other things. The DNS server just has a forwarder to the OpenDNS IP addresses and ...
4
votes
7answers
1k views

What service do you use to manage DNS?

What service do you use to manage your DNS? I don't really want to use the DNS manager that is provided with website hosting company. Is there any reliable and fast DNS manager service? I found a ...
4
votes
1answer
1k views

Using PowerShell, in Active Directory, how would I change all the DNS A records that have a given IP to a new IP?

We've been moving data centers and I have a lot of old records that were not correctly but in DNS as CNAME records, but A records that have a direct IP (e.g. 192.168.100.n) and they're all moving to a ...
4
votes
4answers
3k views

Private DNS zone that resolves private subdomains, and forwards to public nameserver for existing public subdomains

I have a TLD with a series of subdomains that are public, say *.example.com. I also have a private server which is used as a SVN repository, which I would like to have available at svn.example.com, ...
4
votes
2answers
2k views

NAT Reflection, or Split DNS?

I'm working on a network restructure that has three geographical locations, but will share some services. Two of the locations have workstations, and one has only servers (in a CoLo facility). We will ...
3
votes
5answers
337 views

How to convince a corporation to use DNS? [closed]

This is not the first time in my life when I have to convince a smaller corporation about using DNS service instead of /etc/hosts files and IP addresses. It might seem silly/funny at the first time, ...
3
votes
3answers
332 views

Windows Server 2008 Active Directory DNS setup

I have to setup a small windows network inside my bigger linux/mac infrastructure. In order to get the windows clients logging onto the domain, I have had to make the DC their primary DNS server, ...
3
votes
3answers
1k views

How To Properly Setup DNS Forwarders On Windows Server

I was wondering how to properly setup DNS forwarders on Windows Server 2008 R2. I have three Domain Controllers. Each of the DC's have have following: AD Role DNS Role DHCP Role Static IP Address ...
3
votes
2answers
2k views

IP address used by nslookup and ping is different

I have a web server hosted in the network. It has a domain name registered. However, I also host a DNS server for the LAN. So, when someone wants to access the web server, it would check the DNS ...
3
votes
5answers
8k views

Internal DNS with DLINK Router

Using a DLink 2640-T (ADSL2+Router). It cant resolve the internal hostnames. The manual is pointing to the firewall settings of the router to switch off the DNS-Blocking from external (which doesnt ...
3
votes
3answers
177 views

huge slowdown in network of 40 nodes when local DNS is up

We have a LAN with ~40 workstations (mostly Windows) and a couple of servers. All of them use an internal DNS (196.168.0.4 running BIND 9.5.0-P2) and a gateway (192.168.0.1 running OpenBSD Packet ...
3
votes
1answer
571 views

external dns to internal dns

I have a local DNS server inside my network and have set up a few A Name records to some of my internal sites (i.e. app1.domain.com, app2.domain.com) and the dns resolves internally and loads the ...
3
votes
3answers
227 views

How can I search Domain Integrated DNS Entries

Example: I have a server named server1.domain.local I have lots of CNAME entries in various forward lookup zones pointed to server1.domain.local I want to decomission server1, and have a new server, ...
3
votes
1answer
1k views

Using a single-level domain for Active Directory [duplicate]

It's common convention to name a domain something like companyname.local for internal Active Directory with integrated DNS. I'm in a situation where the company name has changed and I would like to ...
3
votes
3answers
735 views

DNS consolidation, how to serve both internal network and the internet

Currently we have a following setup. We have two domain controllers which also serve as DNS servers, used as resolvers by local clients. We also have external autoritative DNS servers for exact same ...
3
votes
1answer
577 views

How to forward missing DNS names of an existing zone in Windows DNS server?

I have setup DNS records for a public domain (say example.com) in my public DNS provider. Among the records, there are some A records of the type *.production.code.example.com that point to a specific ...
3
votes
1answer
115 views

Prevent Server 2003 DNS from caching Failed Lookups

We have a Server 2003 running DNS with Root Hints but with some forwarders for specific domains that contain private services. The DNS servers for the private services are on site to site links, and ...
3
votes
1answer
7k views

BIND9 forwarders not working. Internal DNS resolves but doesn't forward requests it can't process

I have BIND9 set up with proper recorders for my domain example.com, something.example.com is actually working... When I have my DHCP server pointing at this DNS server I can get to webmin ...
3
votes
1answer
958 views

DNS split domain architecture while retaining access to split zones

Like most organizations, we maintain various split domains for a verity of reasons. Due to what we do, we frequently use the same name in different instances of the domain to point to different ...
3
votes
2answers
3k views

Microsoft DNS: Provide different answers per-src-subnet to same query - do I need full split horizon/brain?

I have a network with two vlans, both of which refer to my AD server(s) for DNS. Some servers on this network are multi-homed. Lets say we have the two subnets A: 192.168.7.0/24 and B: ...
3
votes
3answers
5k views

IPSec tunnel between FortiGate and iPhone / iOS - Works except for DNS / Wins

I have configured my Fortigate with a new VPN IPSec tunnel to allow the iOS Cisco client to connect. That works fine. I can RDP to my servers, browse to my servers via IP address, etc. But, the ...
3
votes
4answers
298 views

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 ...
3
votes
3answers
2k views

DNS issue for internal website routing internet connection from remote location

I have an issue that I could use some help with. Our company has a main location and a remote location. Previously, the remote location was connected to the main location through an internet ...
3
votes
3answers
475 views

Suggestions for transitioning to new GW/private network

I am replacing a private T1 link with a new firewall device with an ipsec tunnel for a branch office. I am trying to figure out the right way to transition folks at the new site over to the new ...
3
votes
1answer
640 views

Simple, manageable DNS on EC2?

I'm working on a large network of servers sitting on EC2, and need a way for the servers to know about each other's locations in the cloud. I thought the simplest way would be to use DNS, because if I ...
3
votes
1answer
310 views

How should DNS be configured for remote VPN access to a Windows Domain?

Suppose you have a small windows domain configured as follows: domain name is ad.example.com (as per these guidelines) DC1 is at 10.10.10.3 DC2 is at 10.10.10.4 DC1 and DC2 are running the ...
3
votes
1answer
106 views

Some Hostname is not seen in DNS Manager ( Windows Server 2008 )

DC Server OS - Windows Server 2008 R2 ( Active Directory Integrated DNS Zone ) Client OS - Windows 7 I am unable to understand, why some hostname are not dynamically registered in DNS Manager. For ...
2
votes
7answers
4k views

Master/Slave DNS setup vs. rsync'ed DNS servers

We currently have primary and secondary DNS servers on our corporate network. They are setup in a master/slave type setup, where the slave gets its DNS information from the master. I'm trying to ...
2
votes
4answers
412 views

DNS A record pointing to private IP address [duplicate]

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 ...
2
votes
2answers
221 views

Installation of Active Directory on separate VM from DNS does not entierly work - not sure why

Not sure what I am doing wrong here. I have a moderately midrange server (16 cores, 2Ghz, 32GB ECC REG RAM, 6TB storage, nothing too extreme) where I am running Hyper-V (Server 2012 R2 Enterprise) in ...
2
votes
1answer
109 views

Mass IP domain mapping

I would like to have for each private IP a mapping like this: ip-192-168-0-1.domain IN A 192.168.0.1 I am using bind9. Is there any way to use a regex to do this? I know that bind supports wildcard ...
2
votes
2answers
1k views

Internal DNS for non domain users

At the company I am at we have an Active Directory setup with an DNS server. All the computers that are part of the domain can resolve name from the DNS server with no problem. The current issue is ...
2
votes
4answers
3k views

How does an internal DNS server work in relation to our local servers and domain names?

How can an internal DNS server work in relation to a domain name we currently own? If my company's website is example.com and it currently points to a DNS server elsewhere that points to the ...
2
votes
3answers
107 views

Windows Server 2000 DNS Forwarding

Im using windows 2000 Server, and I need to forward all the requests to the example.com site to another DNS Server. How do I do this?
2
votes
2answers
2k views

BIND/Named DNS zone file: Cannot access website without using www

For our small business network, we host our own internal DNS (Named/Bind) server. However, our corporate website is hosted externally by GoDaddy. We are able to access our external website if we use ...