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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DNS problems with a static IP configuration in a VM

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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1answer
16 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 ...
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0answers
33 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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0answers
16 views

Sending mail only (not receiving) from multiple domains on one server

I have been searching internet and serverfault but I can find an answer to my question. I hope some of you can guide me trhough this. Here is what I want to achieve. I have 2 domains hosted on the ...
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1answer
21 views

MX does not work, after setup CNAME

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

Find all domains on server with different A record

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 ...
0
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1answer
22 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 ...
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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 ...
6
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0answers
38 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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1answer
48 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
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1answer
21 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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50 views

Own DNS server for centralised traffic filtering? [on hold]

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
39 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
32 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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0answers
15 views

create Domain Name Servers For My Server [on hold]

Hello i have detected server - i setup Zpanel On it - it work fun But i need to create DOmain Name server To write it for my clients domains i dont know what shod i do but i tried to it this 2 ...
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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, ...
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0answers
12 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 ...
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0answers
26 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 ...
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3answers
473 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
21 views

Internet access not working on VPN set up with OpenVPN: DNS issue [on hold]

I need to set up a VPN using OpenVPN to use it in my project. I did my researches about this subject and I found that the best solution is using OpenVPN. And I try to find a solution to set up a VPN ...
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0answers
30 views

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

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 ...
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1answer
26 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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31 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
24 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
55 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 ...
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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 ...
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1answer
90 views

Why are there many domain names resolving to IP like 8.8.8.8 and many other? [on hold]

I have been wondering why are there many domain names assigning public address that already owned by other (apart from shared hosting/ip), for example hundreds or thousands domain names assigned (or ...
3
votes
1answer
77 views

OpenVPN routing: multiple default entries. OpenVPN client: iptables. DNS issues

I'm running an OpenVPN-Server (Debian 8) for privacy purposes when using public wifi. Hence, all network traffic of the client is intended to be handled over the VPN connection. The server and client ...
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0answers
32 views

The service 'named' on server server.example.com is currently down [closed]

After updating my server with the yum update command the service named won't start. Content of /var/log/messages: May 16 20:16:01 server named: zone server.example.com/IN: loading from master file ...
3
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2answers
343 views

When is it cost effective to become a DNS registrar? [closed]

My company owns a thousand DNS names (possibly more). I'm curious if it makes sense to become a registrar, and what costs would be involved in becoming one? Are there any benefits that would make ...
2
votes
1answer
36 views

Load Balancing between 2 ISPs

I'm having 2 ISPs, need to balance traffic between the internal users ... Firewall is SRX210 The question is: Each ISP has there own DNS, how to make the dns resolving based on the used ISP? ...
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2answers
51 views

Confusion with DNS on Windows server and Sonicwall

I've been reading a bit tonight on how to best set up our school network for Internet connectivity. It works as it is, but there are hiccups in client/server access to the Internet from time to time. ...
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33 views

Forward DNS Table Entries?

I've been running into a complex issue where I work. We're a small business and we've an Asus RT-AC66U running Tomato 1.2.8 A little background knowledge; In our environment we have a single AD DS ...
0
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2answers
54 views

WIN 2012 DNS Issue

I am troubleshooting an issue with the dns server on the main DC in our forest. I ended up at this point while trying to get a second controller up and running. Current results for dcdiag /test:dns ...
0
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1answer
26 views

SMTP Reverse DNS Mismatch Reverse DNS does not match SMTP Banner

I wonder if you could help me? I have set rDNS to mail.simplyislam.biz for IP 178.32.48.104 with my hosting server and also in DNS control panel. However, I am still failing this test: ...
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0answers
24 views

One domain serving mail and web server on two different machines [on hold]

So I have this use case: I have a remote machine (dedicated) running ubuntu, I also have remote hosting where I have access to mail server. I own a domain example.com. I need to deploy an ...
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votes
0answers
28 views

Server not fouind when setting up cloudflare with inmotion reseller account [closed]

I'm attempting to setup cloudflare on a site that is connected to an inmotion reseller account. The website is http://type3webdesign.com Enom is the registrar, and I have whm and cpanel. As soon as I ...
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1answer
31 views

DNS spoofing with bind9 [duplicate]

I have mobile application which calls to an API (api.example.com) setup in web. For easy debugging purpose I would like to route this api calls to a server setup in my LAN. I have Bind9 setup on a ...
0
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1answer
44 views

Windows Server 2012 - Prompt on accessing network resource from server hosting resource

Here's an odd one that I've not been able to crack. For my home lab setup, I've got two near identical physical servers that run Windows Server 2012 R2. The goal of my home lab setup is to be able ...
1
vote
2answers
41 views

DNS: Root hint server 2001:500:1::803f:235 must respond to NS queries for the root zone

We are using IPv4 in our company. Our ISP does not provide IPv6 and this won't change in the next years. The Best Practices Analyzer (BPA) of our Server 2012 R2 DNS server warns about the IPv6 DNS ...
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0answers
16 views

Bad Referer AND DNS Cache Poisoning [duplicate]

I am annoyed by a lot of bad referer spammers I am seeing in apache's logs. 208.118.126.250 - - [12/May/2015:17:45:06 +0200] "GET /js/parsley.js HTTP/1.1" 200 91434 "http://voiceit.be/logins/login" ...
2
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0answers
49 views

DHCP Failover works but no DNS available

I have a DHCP failover (load balance) configured. DHCP failover works but the clients are not getting any DNS entries. We have 2 DNS servers using AD-integrated zones, and the failover is between ...
1
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1answer
27 views

How to create triple failover / failback with Amazon Route 53

I have three identical servers and I want to provide failover between them such that; If server1 is available, all traffic routes to server1. If server1 is unavailable and server2 is available, all ...
2
votes
2answers
52 views

Work around windows automatically appending DNS suffix

At my workplace, our IT department manages a DNS server. My department works a lot with websites and to access staging servers we need to have certain domains map to those servers. Personally I just ...
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1answer
29 views

What is wrong with my simple dnsmasq setup?

I have dnsmasq running on a server (its IP is 10.10.31.22), let's say its hostname is mydns here's the dnsmasq.conf: domain-needed bogus-priv local=/argonath.mydomain.com/ interface=eth0 ...
1
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1answer
53 views

Why would I want to resolve external domain names in an internal testlab network? [closed]

So I'm building a lab to learn AD and networking best practices and I've setup an AD domain on an internal network. Doing some reading, I've come upon an idea of using a caching DNS server to resolve ...
1
vote
1answer
64 views

Is having the same PTR hostname valid for multiple ip addresses? [duplicate]

Currently I have the following setup with two hostnames and two ips: cheeze1.mydomain.com IN A 123.123.123.111 111.123.123.123.in-addr.arpa IN PTR cheeze1.mydomain.com cheeze2.mydomain.com ...
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28 views

DNS going back and forth

I'm trying to set up my website on a new server (SERVER A). I want the http trafic going to SERVER A while email and http trafic to blog go to SERVER B. For some reason my website keep going back and ...
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16 views

DNSMasq stops forwarding requests after a while

Today I've been having DNS issues. I use DNSMasq in conjunction with OpenVPN to form a VPN. Before now I've never had any problems, but today DNSMasq has randomly stopped forwarding requests. No ...
0
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1answer
24 views

Should I declare zone on slave server for DNS notify and zone transfer

I have problems with DNS notify and zone tranfer. My setup is as follow. Master server: 10.90.7.10 Slave server 1: 10.90.7.11 Slave server 2: 10.90.7.12 I have started rndc server on slave server ...