The Domain Name System, usually referred to by the acronym DNS, is a hierarchical, distributed database where the keys are domain names.

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CNAME interfering with MX record?

I have got a free domain at Freenom, which I use to host my website, and to receive email. About a month ago, I used an A record to point [Blank] and www to the A record of my webhosting. I also had ...
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1answer
15 views

“net.c:577: sendmsg() failed: Operation not permitted” in dig Output

I am running Bind 9.10.2 version on CentOS 6.6 machine. While running the dig command, i am getting "net.c:577: sendmsg() failed: Operation not permitted" notification. dig utility is giving me an ...
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16 views

VPN network for DNS lookups?

I want to provide a DNS server which filters out some websites. This should be used for mobile connections. I know that you cannot set a DNS server when connected through your smartphones mobile ...
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2answers
32 views

Location dependant dns redirection

I have a corporate network with two sites. Each site has its own domain controller with dns service and both domain controllers are servicing the same company.net domain. We have an mpls network set ...
4
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1answer
163 views

DNS Always Getting Non-Authoritative Answer

I'm trying to get an authoritative answer on a DNS query. I've used nslookup using "set querytype=ns" to get the primary name server, which returned the following: yesecommerce.com primary ...
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2answers
50 views

DNS MX vs CNAME entries

I have recently bought a domain for setting up a website. The website is hosted on OpenShift. Since OpenShift doesn't use its own nameservers, I've edited the DNS records on the domain registrar's ...
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1answer
17 views

host -t MX pro.lan -> pro.lan has no MX record

Setting up some service on my server. DNS/DHCP/Gateway ok for my own local network. Planning to host a web mail server (working on local for users for now) I added in my dns A and MX record (rDNS ...
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2answers
25 views

CNAME Record with any other Resource Record in BIND

As per best of my understanding, CNAME can't exist with any other RR in DNS Server. I am using BIND 9.9.5. Now when i am adding CNAME record with a domain which already has NS Records, i am not ...
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12 views

Is it possible to set the TTL of an Azure VM?

In this question Azure VM server url not resolving after re-boot I could not get to the Azure server via URL after I shut it down and rebooted. This is probably likely because I was assigned a new ip ...
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33 views

DNS is only available locally [on hold]

I have recently moved from a managed webhost to an unmanaged dedi provider to have cheaper prices (due to non-management) as well as better resources, hosted at kimsufi.com with a domain hosted at ...
0
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1answer
15 views

Azure VM server url not resolving after re-boot

I have an azure VM that I had shut down for a day and have restarted today. After restarting, I can only navigate to that address using the ip address and not using the URL (eg. ...
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24 views

cannot resolve … Unknown host with Bind

I am using BIND on OS X. nslookup and dig work (I think) but ping and HTTP in browser do not seem to work. $ nslookup a.appname.local Server: 127.0.0.1 Address: 127.0.0.1#53 Name: ...
1
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1answer
28 views

DHCP Server Not Registering PTR Records

I've got a DHCP server that's configured to "Always dynamically update DNS records". Unfortunately, it's not doing its job. The client sends an Option 81 with its FQDN and all flags at 0. The ACK back ...
1
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1answer
41 views

Is it fundamentally possible to configure a VPN with “fake” CNAME?

The goal here is to alias a real domain on the wider internet with something like a fake CNAME entry (or by any other means available). For example, suppose I want to configure the domain fake.derp ...
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2answers
41 views

cname record to rhcloud.Com not working anymore

I have a website hosted at rhcloud.com. I added 2 years ago a cname on my domain name dp-global.vn to redirect to the website (gdp-robertduy.rhcloud.com). Today it is not working anymore and the ...
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0answers
15 views

How to add additional domain to vps [on hold]

I have a vps with primary domain xyz.com Now I want to setup another domain abc.com such that it points to xyz.com/newdomain Currently I have setup abc.com such that it is pointing to my vps home or ...
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0answers
8 views

Local NS list does not match Parent NS list, Name Servers are on the Same Subnet

I have my .ly domain registered with https://reg.nic.ly and my website is hosted on godaddy VPS. I have set custom NS (ns1.demodns.com and ns1.demodns.com) on godaddy via WHM. When i use these NS with ...
1
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1answer
24 views

Cannot resolve DNS -> Refresh -> Loading [on hold]

Hi I'm not the actual Network guy here, but he is off for a long time with Health issues. We're running 150 employees in this place, and the past few months we're been having slight issues I'm hoping ...
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1answer
17 views

Windows 2003 subdomain not working

I'm trying to add a subdomain to my main one, to be connected to an external IP address. So I have: example.com mail.example.com www.example.com Which are working. I want to add test.example.com ...
1
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1answer
11 views

Debian - One Gateway 2 interfaces how to?

I have this scenario. 4 VM Debian8 : 1 DHCP 1 DNS 1 GW 1 Client I can ping from all my VM (except GW) each other (@ip or hostname). My GW have 2 interfaces (eth0->LAN / eth1->WAN). From it I can ...
0
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1answer
16 views

Exchange 2007 - SMTP Traffic

I've done a check of what SMTP trafic is being routed through a 2007 mail server, which we are decommisioning. It looks like all printers are using the mail server for smtp relay, would it be ...
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2answers
59 views

Can ping by IP address but not by hostname [on hold]

I have 3 Debian VM. 1)DNS 2)DHCP 3)Client DHCP looks ok. I got my fixed-address on DNS and Client like I want. When I try to ping each of them @ip it's responding. If I try to : ping dhcp But I ...
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0answers
47 views

ERR_ICANN_NAME_COLLISION when trying to use localhost .dev in Chrome [migrated]

Today I got this error when trying to access local domains specified in apache httpd-vhosts.conf. It happened for the 1st time with a .dev domain, so it seemed plausible that in light of recent news ...
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1answer
64 views

What is wrong with this BIND config?

I am using BIND 9.8.2rc1-RedHat-9.8.2-0.30.rc1.el6_6. It is not responding to queries, port is open from what I can tell. Even from actual server if I ping my domain "ping example.com", it doesn't ...
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2answers
53 views

rDNS 'zone [xxx] has no address record (A or AAAA)

teaching myself some server tricks. Getting trouble with bind9 on debian8. named-checkzone pro.lan db.pro.lan.inv zone pro.lan/IN: NS 'server.pro.lan' has no address records (A or AAAA) my ...
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2answers
22 views

Linux Server Update Windows Server DNS (DHCP Not Windows)

I have Linux machines that are DHCP clients that have send hostname enabled but are not updating DNS on the Windows servers. DHCP is coming from the firewall, NOT Windows. Other windows machines ...
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0answers
11 views

collectd: using dynamic IP for network plugin

I've setting up a server which collects statistics of different other servers. I'm using the network plugin of collectd, so I configured the plugin network by setting up a listener. In my network, I ...
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0answers
54 views

DNS problems with a static IP configuration in a VM [migrated]

I am using Parallels Desktop 10.2 for Mac on OS X Yosemite. I am trying to configure my my client (Ubuntu 14.04) to host a website that is available to the host via a particular domain name. In the ...
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2answers
35 views

Match BIND's view to certain users

It's easy to make a BIND's view to match certain IPs with the aid of match-clients directive. But is it possible at all for a view to match not IPs, but users? For example service a is run under user ...
2
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0answers
39 views

Nginx, wrong site served

I have my site on the IP 1.2.3.4 On my domain provider I have both onesite.com and anothersite.com pointing to 1.2.3.4 With Nginx, I have two sites configured: server { listen 1.2.3.4:80; ...
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1answer
28 views

MX does not work, after setup CNAME [on hold]

I have the following configuration in the DNS server (1-configuration): -------------------------------------------------------------------- Host name | IP address/URL | Record Type | MX ...
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0answers
33 views

Find all domains on server with different A record [closed]

I am migrating some websites to a new server using the WHM/cpanel transfer tool. It can do an "express transfer" where as well as transferring the account, it also changes the A record at the source ...
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1answer
31 views

rDNS and forward DNS for mail server behind firewall, different IPs

All, Here is my setup : Firewall(x.x.x.114) <--> mail.mailserver.com (FQDN) (x.x.x.118) When sending mail, header has following IP ...."Receivedfrom mail.mailserver.com ([x.x.x.114])", my ...
2
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0answers
44 views

DNS Attack - 203.115.81.38 / 203.115.71.66 [duplicate]

I've noticed today that some of our companies clients' DNS servers were changed to 203.115.81.38 and 203.115.71.66 even thought they were still using DHCP. I wonder if this is some sort of an ...
9
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0answers
86 views

Cannot add conditional forwarder without root zone

(Disclaimer: I am not a Windows DNS admin. I do have a decent amount of DNS experience under my belt though, and this is not making any sense. I am working closely with the admins responsible for ...
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votes
1answer
51 views

Public Domain Name to Intranet

let's say 1) I have a server running in a private intranet. It uses tomcat to serve a webapp at privateserverip:8080/appname 2) I have a myapp.local domain and when I enter it toplevel with ...
0
votes
1answer
25 views

Not able to load reverse zone with bind

I've created a simple bind dns server to host 3 zones in a test lab. bath.local (192.168.100.0/24) munich.local (192.168.101.0/24) dhcp.local (192.168.99.0/24) I want forward and reverse ...
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0answers
51 views

Own DNS server for centralised traffic filtering? [closed]

So, the case is: we have a bunch (3 digits) of mobile wifi routers with a strict data limit for the whole group. As we in the couple of recent month nearly reached this limit, decided to disable some ...
1
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2answers
46 views

create my own active directory in a EC2 instance of Windows 2012 in AWS?

I have been using Azure where I could use one of the Windows VM as a domain server with AD sitting in subnet 1 while others VMs sit on the subnet 2. So far so good. Now I am building the similar VMs, ...
1
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1answer
39 views

BIND9: Send Notifications on Specific IP Address

I've been trying to implement a bind master->slave setup between two machines, but I've a problem regarding the IP address BIND used on the master to notify my slave machine. Here is my setup: ...
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votes
1answer
25 views

DNAME Functionality Using CNAME

I have a simple name server with namecheap, however the company I host Teamspeak with redirects to have an IP with Teamspeak's default port. So the IP they give me actually looks like this instead, ...
0
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0answers
14 views

Apache mod_proxy ProxyRemote to round-robin DNS - always the same subnet

I set forward proxy server using apache mod_proxy, which connects to 20 other proxy servers using ProxyRemote feature. You can set just one URL for ProxyRemote , in my case it's ...
0
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0answers
27 views

Windows 2012 DNS server: proper address resolution on one computer only

I need www.example.com to resolve to 192.168.0.1 on my local AD network. Therefore I've added www.example.com Forward Lookup Zone on AD controller. On my computer as well as on the server itself it ...
8
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3answers
493 views

DNS root record hardcoded then why it has ttl?

I host a recursive name server locally so I don't need my service provider or another public DNS server for name resolution. Although the root name server IP-addresses are hardcoded in the config file ...
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0answers
31 views

weird DNS issue when looking up a service provider's services [closed]

I came across an interesting issue today. I was looking up node1.ar.service.com from the one of the 3 DNS servers exposed to the internet. These 3 servers act as authoritative servers at my ...
1
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1answer
28 views

DNS for REST API in machines with different resources

Suppose I have a REST API system that has these requirements: The API that can be accessed via this URL http://<ipaddress>/api/ I have three computers with three IP addresses: IP A, B and C ...
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0answers
34 views

Host name alias resolves to different computer in network

I have an alias 'DATA-SERVER' for many machines in my network. When I try to access DATA-SERVER from a computer (say Computer A), it resolves to some other Computer C and not to A itself. How do I ...
1
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1answer
26 views

Wildcard DNS to NOT resolve a specific entry

I have a wildcard DNS on my external service: *.example.com I have one specific service, that I need to NOT resolve externally, to help a VPN service type connection fail silently. If there a way ...
0
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1answer
58 views

Is a CNAME sufficient for a www. record?

I have been doing a server migration, and checking that everything related to DNS is configured correctly by using IntoDNS. After doing this though, it flags up a error saying that there is no A ...
0
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2answers
39 views

Dynamic Routing via hostname, is it possible?

I am using a dynamic IP service to access my home PC's remotely and maintain that DNS is updated when my IP changes. I run 5-6 machines and I would love to be able to do machine1.mydomain.com and ...