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

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Connectivity problems on website

We've been experiencing some connectivity problems on http://www.scirra.com. Running a DNS check: http://dnscheck.pingdom.com/?domain=www.scirra.com We're getting some errors: Delegation not ...
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votes
1answer
40 views

One domain, two server Ip [closed]

I have a domain like example.com, then in the DNS config I set: A (HOST) * myProductionServerIp @ myProductionServerIp CNAME www @ So any query to example.com or www.example.com will ...
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1answer
85 views

Apache/DNS - Pointing Domain Name to Folder in my Directory

I have a folder with an app that I'm serving. In my httpd.conf, I set up a virtualhost to point to that folder. During development I set it up to point to a subdomain on a domain that I own ...
3
votes
1answer
61 views

Corrupt DNS requests

Sometimes in some network captures that include my DNS server, I find there are failed lookups for what seem like invalid requests. When viewed in Wireshark these show up with what looks like escaped ...
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1answer
46 views

Switching to different domain registrar and different host without any website or email downtime

What I currently have: Domain registered at register - oldregister.com Website hosted at different host - oldhosting.com Email hosted at different email provider - oldemailhosting.com What I want: ...
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0answers
84 views

Cisco ASA not allowing DNS traffic to pass?

I have an ASA 5515 as my internet firewall. It is not allowing me to do NS Lookups from any internal DNS Servers, or clients. If I set my nslookup server to 8.8.8.8 (google DNS), I can resolve public ...
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votes
1answer
222 views

How to add reverse dns record on cloudflare [closed]

I need to set PTR record on my cloudflare account, because all outgoing mails are going to spam. I do not see ptr record in my cloudflare account. Can I use txt/srv record instead?
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2answers
2k views

Why is DNS returning two different results at random?

I changed my nameserver and host company for my domain 30 hours ago. Now, DNS propagation checks indicate that the correct nameserver is recognized worldwide. However, browsers on my own machines ...
4
votes
1answer
157 views

Purpose of SOA record in DNS (apart from zone transfer)

Does the SOA record in a DNS zone file have any purpose whatsoever, apart from zone file transfers? If a DNS server does not rely on zone file transfer for replication (but instead relies on some ...
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votes
2answers
85 views

How to point CNAME to Digital Ocean droplet

Having an issue trying to point a CNAME to my Digital Ocean droplet I created a CNAME on DNSimple and pointed it to the IP address of my Digital Ocean droplet: ironman4x4.adamgeorge.com I've tested ...
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2answers
47 views

Changing DNS Server - how to update Static assigned Member servers?

We are upgrading our Server from 2008 to 2012. In that process, We have a Windows Server 2012 acting as a new DNS, with a new IP - DNS2. Most of our servers use static IP (as well as DNS assignment) ...
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1answer
76 views

Secure Domain.nl , Alias of SSL Certified Domain.com not working with .com's SSL Certificate [closed]

I have a .com site that is https with a Comodo certificate via Dreamhost. I also have https://cdn.domain.com with a unique ip address to make it play nice with MaxCDN. The site is run in two languages ...
3
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0answers
49 views

How do large SaaS providers support A records? [closed]

According to RFC 1035 CNAME records cannot be used used in a zone apex because a CNAME record cannot exist alongside records such as SOA. This is frequently a source of frustration for those trying ...
4
votes
1answer
185 views

Is this a case of a stale ISP DNS cache or did I fudge something up?

I am currently in the process of transferring a legacy website (from a legacy hosting service provider) to a modern solution. Due to my context-specific requirements (which include financial ...
0
votes
1answer
52 views

Apache: Connection times out on all subdomains

Recently I've been setting up Apache for a friend (I have't used Apache in ages, I've switched to nginx). Anyway, I was able to set up the server itself, and can connect via "example.com". However, ...
0
votes
1answer
22 views

Weird routing when accesing local service on OpenVPN server

I'm currently having a very restrictive internet access, basicly, anything that doesn't use port 22, 443 or 80 are routed through a different network who has a 1 seconde ping and 60% packet loss. ...
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vote
2answers
161 views

Confused about Linux Hostname, DNS Hostnames and FQDN Hostname

This might sound stupid and basic to some of you, but I am still so confused about this even after reading numerous sources on the net. My questions still unclear are: Is the Hostname in machine ...
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votes
2answers
30 views

RDATA for DNS PTR record [closed]

I'm a bit confused about the relationship between PTR and MX records in DNS. I understand the basic idea and need for these records: Essentially, an MX record gives you the hostname of the SMTP ...
5
votes
2answers
796 views

Reverse DNS records not registered when using DHCP

I've stumbled upon a strange behaviour with Windows machines, which seems to be fairly consistent between all Windows versions from Vista/2008 to 8.1/2012 R2; it doesn't happen instead when using ...
2
votes
2answers
70 views

Running own DNS in intranet, how to reach outside DNS from clients

The Scenario: I am creating a Network for 8 Windows 7 Workstations running in a Student Laboratory. They are supposed to browse the internet, but not to be reached from outside their intranet. To ...
1
vote
1answer
56 views

How do i point emails to Office 365 and Exchange at the same time?

in the near future i will be moving a company that we support to office 365. They are currently on Exchange 2003. I will be saving each users emails to pst from their current mailboxes, then adding ...
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0answers
111 views

Parkingcrew.net hijacking our domain

we are experiencing a very bizarre sort of hijack on our domain www.lbps.co.uk It seems to render fine on desktop systems and on mobile devices over WIFI it also seems fine. However when WIFI is ...
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1answer
54 views

Why is host so much slower than dig on some queries?

When querying a particular address, dig as run against the resolvers listed in /etc/resolv.conf will return NXDOMAIN nice and quickly where host will take a while. $ dig @<resolver> ...
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0answers
64 views

Does AWS Elastic Beanstalk Swap Environment Url swaps environments for git push?

I have read the docs for zero downtime on aws but cant seem to understand what happens in this scenario? I have a environment running in production called 'red' I duplicate the environment as 'blue' ...
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votes
1answer
41 views

Testing a mail server

Suppose you want to test a mail server for a particular domain before going live with DNS change. For example, when you want to test an HTTP/HTTPS site you can just change your own machine's hosts ...
0
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1answer
36 views

Nginx redirection to url writen in requested file

I need to setup dynamic redirections. For example, a user open a link : http://www.example.com/2/3/4/ and see the page on the following address: http://www.example2.pl/something. I know about ...
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1answer
283 views

postfix/smtpd[1337]: warning: hostname example.com does not resolve to address 93.184.216.119

I am having trouble figureing out what exactly the following error message means. It pops up in the logs whenever a mailserver from 192.168.x.x address is pushing mails. postfix/smtpd[1337]: ...
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0answers
23 views

ASA/AnyConnect will only allow 53/udp to the DNS servers listed in the profile

I found a "bug/feature" in Cisco AnyConnect/ASA 5510: if a VPN client makes a query to udp/53 (DNS query) to any IP address that isn't listed as a DNS server in the VPN profile, then ASA drops this ...
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1answer
53 views

Parked domains on Spamhaus DBL

I've set up a nameserver to park a bunch of my domains (similiar to sedo, bodis etc). Everything is working well. Unfortunately, all my parked domains are instantly listed at spamhaus (DBL). No mail ...
0
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1answer
36 views

DNS Zone manager - Server name and NS records mismatch. Pingdom errors

http://dnscheck.pingdom.com/?domain=leadassign.com&timestamp=1413917580&view=1 Lists errors: "Superfluous name server listed at parent: ns1.io-servers.com.", etc. I think its because in the ...
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vote
1answer
249 views

Nginx dynamic proxy_pass doesn't resolve properly

I'm having problems configuring nginx, I've searched the web for solutions and I have some bits and pieces but I'm still not able to come up with proper configuration. I have registered a domain, ...
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0answers
50 views

Configure adapter setting to add loopback IP address to the list of DNS servers

I have Active Directory integrated DNS. I ran the Best Practices Analyzer (BPA) for DNS and received the following error: I have the following network adapters: I am not using the second ...
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votes
1answer
22 views

DNS zone servicing concepts

Currently I am working out some concepts about how DNS works and am running into a question I can't easily find an answer to on the internet. I am looking for an answer based on a set of questions ...
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1answer
33 views

Setup DNS - different mailservers for different accounts on same domain

How to setup DNS so you can use multiple mail servers with both different mail accounts on them? Reason I ask is because I have gone from a mail server from a website-provider to a paid solution. Not ...
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votes
3answers
62 views

understanding resolv.conf nameserver through system calls [closed]

I am trying to understand how /etc/resolv.conf /etc/nsswitch.conf exactly works and what is significance of nameserver entry 127.0.1.1 I did strace ping google.com to get to know about the system ...
-1
votes
1answer
39 views

understanding resolve.conf nameserver through system calls [duplicate]

I am trying to understand how /etc/resolve.conf /etc/nsswitch.conf exactly works and what is significance of nameserver entry 127.0.1.1 I did strace ping google.com to get to know about the system ...
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votes
2answers
78 views

How does my registrar (Namecheap) let me set up a CNAME record on the apex domain?

Namecheap seems to let me create a CNAME record on the apex domain, which I thought was contrary to the definition of a CNAME record: It works (correctly loading up my static site from S3). ...
0
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1answer
55 views

How to set up a DNS authoritative nameserver with just an IP?

I'm looking to set up my first DNS server, after having used registrar or web host provided DNS for years. It's going smoothly for the most part, but I'm having a bit of trouble understanding how to ...
0
votes
1answer
82 views

Different DNS lookup results for dig, nslookup, telnet and curl

I'm having a weird disagreement between a bunch of tools on my Debian 7 box about the IP adress a certain domain name should resolve to: $ dig www.ip-camera-beveiliging.com [...] ;; ANSWER SECTION: ...
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votes
1answer
34 views

DNSSEC chain of trust

My test environment details are as follows :- I have fake-root server "172.16.93.193" DNS resolver "172.16.93.101" DNS server "172.16.96.93" I have already configured my resolver and it working ...
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0answers
34 views

nslookup gives timeout based on request - what gives?

I have the following strange problem with the DNS lookups in our Windows domain (dns service runs on the domain controller): from machine 'A': dns request for machines in the same network zone ...
0
votes
2answers
62 views

Bind DNS not working?

I Know there always lots of answer about Bind. But somehow I can't understand the problem of my settings. Here is my configuration options { listen-on port 53 { 192.168.159.130; }; ...
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votes
1answer
1k views

BIND failing to resolve with 'WARNING: recursion requested but not available'

there are no errors in the logs and query logging won't initialize iptables is fully disabled but the server will respond with "WARNING: recursion requested but not available" because my client ...
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votes
2answers
32 views

How to make a subdomain resolve the root domain

I have a domain, example.com that belongs to an Apache server. I want visitors to both us.example.com and cn.example.com to see what is seen when visiting example.com. The subdomain must remain ...
1
vote
1answer
50 views

How to set up 2 domain name pointing to 2 different folders on the same server?

I have 2 domain names registered. I also have 1 server at AWS. (running Ubuntu) I would like to host 2 websites on my server but have no clue how to do it. I have two directories /var/www/alpha and ...
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votes
1answer
55 views

Setup cPanel to use MX records defined at domain registrar level (and not local MX records) [closed]

I use cPanel (without whm on this account) for a number of domains within the same account. For some of these accounts we are only using the related hosting for website hosting, the email is hosted ...
0
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2answers
93 views

Cannot resolve host as non-root user

I recently setup a VPS server running Centos 6.5 together with Web Host Manager. My current problem is that I can't resolve hostname either by nslookup or ping on the command line. But when I login ...
0
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0answers
55 views

CORS problems with DNS forwarding to AWS EC2 instance Atlassian Jira Tomcat

I have Atlassian Jira set up in a Tomcat server on my ubuntu AWS EC2 instance with a godaddy domain forwarded to an elastic IP on the EC2 instance. Looking at the console in Chrome, the JIRA ...
0
votes
1answer
48 views

DNS Lookup issue [closed]

A friend has a website and it seems there is now (for some reason) a problem with DNS resolving. If I nslookup domain.com I get a NXDOMAIN response, but if I do nslookup domain.com ns2.powweb.com I ...
1
vote
1answer
44 views

Custom TLDs, shortened URLs and usage

I'm curious about a few things with regards to TLDs and their allowed/semantic usage. I'm in the wine business and I currently own a .com domain. However the main domain name is quite long; not really ...