DNS stands for the Domain Name System, a hierarchical, distributed database where the keys are domain names.

learn more… | top users | synonyms

0
votes
1answer
39 views

How to share several domains on one IP? [closed]

I have external static IP, one domain in com zone, free dns provider and home pc with wifi router. Domain was delegated to my IP and localhost works perfect. I did it using PORT FORWARDING RULES ...
2
votes
1answer
40 views

WMI query of DNS shows a root hint that's not present in the DNS plugin.

I was writing a Powershell script for my network when I came across some alarming information in our DNS. Bear in mind we still use Powershell v2, not v3. So I have to query DNS via the Get-WMI ...
1
vote
1answer
91 views

nslookup works but ping fails with DNS error randomly [closed]

I am using Mac OS X 10.6.8. When I am trying to ping a particular domain it returns me "Unknown host" but when I run nslookup on that same host immediately it returns me the correct IP. Ping ...
2
votes
1answer
35 views

Active Directory DNS not resolving ANY queries

I'm experiencing some weird behaviour with our AD Dns resolver. Our Windows network uses the AD as it's DNS resolver, which then in turn resolves queries like Google.com and so on. All fine and dandy ...
0
votes
1answer
41 views

DNS request anomaly

Experts, i have some problem in DNS servers configuration, network diagram is shown in figure: The problem is manifesting as follows: There're 2 DNS servers servicing both internal and external ...
0
votes
0answers
36 views

VPN client names incorrectly resolve to their private LAN IP addresses, DNS Issue?

My office network is running a single Windows Server 2012 Standard as Domain Controller, DHCP, DNS, NPS, and RRAS. DHCP has a scope of 192.168.1.50 through .200, and RAS is configured to get IP ...
0
votes
1answer
59 views

Using alternate server for specific subdomain - DNS settings

I'm trying to set up DNS records for a domain name, such that mail.domain.com uses a server that is different from any other request to *.domain.com. As I've been going about trying to figure out how ...
-1
votes
2answers
45 views

DNS root hints at 2012 R2

What is the recomended site to fullfill all DNS root hints box in windows server 2012 R2? I see a 'copy from server' button below the box, but I have no idea what site can we use to import DNS root ...
-4
votes
1answer
72 views

Previously working domain name, suddenly 'no records found'

The domain name is question: cleangreenpgh.com. I host a few web client websites on my co-located Mac server. Domains are through OpenSRS. Four domains in all, using same records to point to ...
0
votes
1answer
39 views

DNS propagation - the process [duplicate]

I am not a network person, so, I'm not sure how to ask this question. Let's say we have our own DNS server that is local to our company. Someone registers a new domain name or a change is made to ...
3
votes
3answers
185 views

Redirect IP Address to Domain Name

I am attempting to redirect the IP address of my domain to the domain name and am running into trouble. The IP address does not redirect to the domain name listed in the redirect statement below. ...
0
votes
2answers
39 views

How to find programs using DNS on a network/machine

I have making a server switch. I am using wireshark and seeing that some PCs on my network are using DNS to make requests to the old server. I would like to track this down but do not know how. I ...
1
vote
0answers
20 views

DNS Timestamps don't appear to be updating since enabling Secure Only Updates

We have a Windows Server 2008 R2 Active Directory Domain. There are 4 domain controllers each running DNS with a Active Directory-Integrated zone. There are 2 member servers running DHCP with Name ...
2
votes
2answers
66 views

Will MX records with a longer TTL help mitigate effects of DoS attack?

We have our email hosted at Google Apps, and have our DNS servers for the domain setup at Namecheap. About a month ago our website went down (not a big deal, since it's most just a contact info ...
1
vote
1answer
18 views

redirecting subdomain to www gives page not found error

On my vps plesk server I have created one domain mydomain.com and for that domain I have created subdomain as subdomain.mydomain.com but if i redirect this subdomain to www.subdomain.mydomain.com ...
1
vote
1answer
41 views

Running authoritive nameserver in ipv6 only environment?

What are the arguments against running an authoritive nameserver (primary) e.g. bind in a ipv6 only environment? In the current setup the machine dedicated to the nameserver has only direct ipv6 ...
-1
votes
2answers
41 views

server's email going to spam for yahoo users, possible SPF issue? [duplicate]

Our website is sending out email verifications to members who sign up with our service. Yahoo is throwing our messages in the spam box and displaying this message in the headers: Received-SPF: none ...
0
votes
1answer
33 views

Forwarding a domain to another subdomain

I have 2 domains jainaditya.in (domain purchased from GoDaddy and currently parked) and techphernalia.com (domain and web hosting from one.com). I created a subdomain ajain.techphernalia.com. ...
0
votes
0answers
47 views

Inconsistent server connectivity with System.Net.HttpWebRequest

I have a production database server (Windows Server 2008 / SQL Server 2008) which has a .NET CLR Assembly referenced on it with a CLR function called dbo.fnu_RequestUrl. The purpose of this function ...
0
votes
0answers
18 views

Moved registrars/DNS, now site is unavailable for most?

I've had a site up for a client at http://staging.livecurriculum.com for years. They've managed the DNS on their end, previously through Dreamhost. They recently moved this domain to NetSol and now ...
3
votes
1answer
106 views

What is the syntax of email address with a dot behind it? in DNS zone file, SOA rr

How i can use a email address with a dot in behind. For example at bellow, email address is hostmaster@example.com, How to use host.master@example.com ? example.com. IN SOA ns.example.com. ...
1
vote
3answers
149 views

DNS issue? I cannot ping FQDN, yet I can ping alias (CNAME)

I'm experencing weird DNS issue and I was wondering if someone has any ideas: # ping -c1 test.XXX.local ping: unknown host test.XXX.local # ping -c1 test PING test.XXX.local (10.52.223.41) 56(84) ...
2
votes
1answer
40 views

Multiple Virtual Host isn't working in apache

I was configuring a VPS with Apache2, MySQL, PHP. The Main site is working fine. Then i went to create a webmail with a Subdomain. Whenever someone browse webmail.mydomain.com he or she should have ...
1
vote
2answers
83 views

Disabled recursive DNS. How to configure Split DNS? [duplicate]

I have a Windows Server 2008 R2 server which is hosting a public website. I recently deactivated "DNS Recursion" for security options trough the following method: In the properties of my DNS server ...
0
votes
2answers
47 views

Can there be DNS records for subdomains but not for the main domain?

Is it possible to have DNS records for mail.example.com and dav.example.com but not for example.com? There is nothing served on example.com. It only contains a MX record. Why I need this: I use ...
3
votes
3answers
141 views

How to combine Active Directory with Split-Horizon DNS?

I'm in a quandary. I need to implement Split-Horizon DNS in my office based on subnet. For example: Users in 10.170.0.0/16 need to resolve "srv01.extra.company.com" to 10.170.0.5 10.25.0.170 Users ...
0
votes
2answers
142 views

How to flush Amazon Linux AMI DNS cache?

The typical way of flushing the dns cache does not seem possible in Amazon Linux AMI: service nscd restart does not work because it's not included within the VM. service dnsmasq restart does not ...
0
votes
2answers
71 views

Using a CNAME to forward traffic from a naked domain

I have a domain, flyh2.com. I use a CName to forward www.flyh2.com to flyh2.elasticbeanstalk.com where my web site is hosted. This is the only way Amazon allows custom domain names. A records aren't ...
-3
votes
1answer
44 views

Building a Windows Server 2008 R2 (DNS, DHCP, AD, etc…) [closed]

I'm looking forward to build my own Windows Server 2008 R2 machine for a company that is in the process of establishment. I have some questions regarding the Windows Server. I'm pretty new to it .. I ...
0
votes
2answers
29 views

It is possible to point some specific subdomains to a DNS server using Wildcard subdomain?

Assuming example.com domain and fake IPs, the configuration needed is this: example.com point to 186.200.1.1 www.example.com point to 186.200.1.1 adm.example.com point to 186.200.1.1 ...
3
votes
3answers
40 views

Does a host/domain used solely for MX records pointing elsewhere need an A record?

I've got a domain on dns.he.net that only has an SOA record, NS records, and one MX (pointing to a totally different host). Does my domain need an A record? Currently nslookup fails since there is no ...
0
votes
2answers
40 views

Do I need an MX record for my main domain?

Let's say I have several domains. bossguy.com is the domain that hosts my mail (IMAP server) and where I ssh in to manage other domains, for example: domain1.com domain2.com domain3.com It makes ...
0
votes
1answer
44 views

Google DNS is too slow connecting to Google APIs

I have a linux server in Germany. The server is configured with Google DNS. When I call from the server some Google API, the connection is too slow, it takes always 2 or 3 seconds to connect to the ...
0
votes
1answer
102 views

NSLookup resolves to local DNS, but browser resolves to public

Problem When trying to access internal servers via hostnames using NSLookup (both Windows & Linux/Arch/Debian) I receive the correct DNS server address, FQDN and destination IP address. When I ...
2
votes
0answers
268 views

Unable to join Fedora 20 machine to Active Directory with realmd

I don't know a lot about Active Directory, but I have some basic knowledge of what it does. I have been trying to join a Fedora 20 machine to the domain, and have been having some issues. I ran the ...
-2
votes
1answer
51 views

Should i use DNS or Proxy for server resolution? [duplicate]

We have a custom java web app. We are setting it up in instances in different vps (different providers, different locations).Each instance is independent and self contained. We have several docens of ...
0
votes
2answers
36 views

Setting up different application instances under one DNS

We have a custom java web app. We are setting it up in instances in different vps (different providers, different locations). We have for example: Instance 1: http://server1/app1 Instance 2: ...
1
vote
0answers
34 views

Redirecting a domain in cPnael Results in /cgi-sys/defaultwebpage.cgi

I'm not sure if this is the right place to ask it or if it should be over on StackExchange, feel free to redirect me! I had a domain www.sample.co.uk (primary) & .com (forward) My client has ...
-1
votes
1answer
38 views

DNS how to dynamically bind subdomains to ip and port pairs [duplicate]

I'm using bind9 I have a zone file setup with a few subdomain A records. I'm wondering if I can create a subdomain record that points to an ip address on a specific port. I'm currently updating the ...
-1
votes
1answer
50 views

Masking CNAME/A Record Requirements from Clients

I'm reselling hosting services to non-technical clients. With regards to associating domains/IPs, the host I'm reselling requires that once a VPS is deployed i then go to the domain's registrar and ...
0
votes
1answer
40 views

Apache2 Default overrides virtual host

I have an Ubuntu 12.10 LTS server running apache2 with a simple wordpress install. I created the virtual host in /etc/apache2/sites-available and used a2ensite to enable it. All was working fine for ...
3
votes
1answer
23 views

Subdomain used as a param for main domain: CNAME vs A record

Let example.com be the main blog with a lot of articles about different topics. Now I want to have topic1.example.com to show only posts related to topic1. The Rails application that powers the blog ...
-1
votes
3answers
127 views

Change private dns on AWS?

Is there a way to change the private dns of an EC2 server? I want to be able to communicate between my servers with something like myserver.example.com than ip-1.1.1.1-uswest-aws-internal. I am new ...
0
votes
0answers
27 views

RPZ in Bind and wildcards

I'n not sure if this is possible. I am able to setup a DNS with RPZ zones for blacklisted domains and whitelisted domains. The problem is that I want to whitelist only a couple domains while ...
1
vote
2answers
72 views

Can we have multiple CNAMES for a single Name?

Can I have multiple CNAMES for a single name? I need this for load balancing. For example, I've two azure storage accounts (say a and b) and the blob addresses for those are a.blob.core.windows.net ...
0
votes
2answers
47 views

BIND: Whitelist IPs using nsupdate

I know that we can add any kind of DNS records in BIND DNS server using nsupdate. Can we whitelist or blacklist any ip in realtime using nsupdate. We whitelist only certain IPs to prevent our DNS ...
2
votes
1answer
36 views

SMTP routing cases: same @domain as sender and different @domain

I would like to know what is the difference between sending an email to the same @domain as the sender and sending to a different domain. I cant really find a detailed explanation on the web. From ...
0
votes
1answer
39 views

Is it possible to make one public ip point at different servers within a local network? [closed]

Title is a bit vague so here i go! Basically i have setup a local dns server that allows me to use my local network using hostnames. e.g. dns.subdomain.home i would like all these servers to be ...
0
votes
0answers
25 views

Open VPN: add DNS rule to change server domain to local IP

I have a working setup, where all traffic is redirected via a open VPN tunnel. Only issue I have left is, that I want the domain of the server to be the local IP address. Meaning that when the client ...
11
votes
1answer
483 views

What is an open DNS resolver, and how can I protect my server from being misused by hackers?

I don't have the strongest background in computer security, but yesterday one of my company servers was shut down by our host. It's a server assigned a public IP where I host several web-service ...