Questions tagged [dns]

DNS is the Domain Name System, a hierarchical, distributed database to map various information together, such as hostnames to IP addresses. The name is also used as a synonym for nameservers, the specific servers delivering the DNS feature. This tag should be used for all issues about configuration of DNS systems or troubleshooting problems in names resolution.

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224
votes
7answers
97k views

If ICANN only charges 18¢ per domain name, why am I paying $10?

ICANN charges 18¢ per domain name registered regardless of its extension, but I pay $10 for a domain name per year with my registrar. What do domain name registrars do for its customers to justify ...
106
votes
4answers
124k views

Using multiple A-records for my domain - do web browsers ever try more than one?

If I add multiple A-records for my domain, they are returned in a round robin order by DNS servers. Example: 192.0.2.1 A example.com 192.0.2.2 A example.com 192.0.2.3 A example.com But how does web ...
68
votes
4answers
142k views

What does an asterisk/star in traceroute mean?

The below is a part of traceroute to my hosted server: 9 ae-2-2.ebr2.dallas1.level3.net (4.69.132.106) 19.433 ms 19.599 ms 19.275 ms 10 ae-72-72.csw2.dallas1.level3.net (4.69.151.141) 19.496 ...
43
votes
4answers
26k views

How to use Cloudflare and Namecheap email forwarding at the same time?

I want to use Cloudflare, and it requires that I use their nameservers. The problem is that I'm using some features from Namecheap like email forwarding, which will be disabled (if I didn't get it ...
37
votes
3answers
17k views

What is the safest way to search for domain names availability?

I am victim of Domain name front running. I searched for domain names on some sites & I lost those names soon. Now, what is the safest way to search for availability of domain names ? Using ...
33
votes
5answers
2k views

Does registering a domain for 10+ years help search rank?

I've heard that registering a domain name for a very long time, say 5 to 10+ years, can help with your search rank. This seems at least plausible to me, since a fly-by-night, massive domain name farm ...
32
votes
7answers
30k views

Forward naked domain with URL path for my Google Domain

I purchased a domain through Google Domains and I am hosting my app on Heroku. I would like users to be able to access my app through the naked domain, but Google Domains does not allow CNAME's to ...
31
votes
2answers
125k views

How to forward non-www to www. Using Godaddy DNS Manager

so I've set www.mydomain.com to point to ghs.google.com, which correctly loads my Google site, but if you go to mydomain.com, it doesn't redirect/forward to www.mydomain.com, it just hangs. is there a ...
29
votes
7answers
7k views

Should I use a domain name registrar's free DNS hosting, or host DNS servers with another company?

Should I use my domain name registrar's free DNS hosting service, or host DNS servers with another company? (or both?) What are some advantages to using a DNS hosting company separate from the domain ...
28
votes
7answers
4k views

Registrar with good security, DNS hosting, and DNSSEC and IPv6 resolvers?

I'm looking to move my domains away from GoDaddy, but I'm having a tough time finding anyone with comparable features at a (even remotely) similar price. I've looked at the usual suggestions (...
27
votes
3answers
6k views

Should I have both example.com and www.example.com?

I used to have a website which could be addressed by both example.com and www.example.com leading to the same page. Now, I moved to another server and only the example.com works. I got an email from ...
27
votes
4answers
66k views

Is there any way to redirect one domain to another via DNS settings keeping the path information?

For example, my domain is example.com and when someone navigates to example.com/sample/page.htm, I want it to redirect to test.com/sample/page.htm. I know that this can probably easily be done using ...
23
votes
2answers
2k views

IP ADDRESS request vs. DOMAIN NAME request?

Today I bought a shared hosting package. Then I added an index.html to it via FTP. When I enter my given IP address in Chrome, I'm always seeing Plesk's default page, instead of my index.html. But ...
22
votes
5answers
16k views

TXT vs SPF record for Google servers SPF record, either or both?

According to Google’s documentation, https://support.google.com/a/bin/answer.py?hl=en&answer=178723 It clearly says Create a TXT record containing this text: v=spf1 include:_spf.google.com ~all ...
21
votes
1answer
5k views

If I specify a wildcard DNS entry, will it override any specific values?

I have cheese.mycompany.com - 1.1.1.1 I want to go *.mycompany.com = 1.1.1.2 without effecting cheese? Will this work, just having two seprate DNS entries?
18
votes
3answers
22k views

How can I get a history of DNS registration information?

Is there a canonical place that stores DNS registration information? For example for a domain that has changed hands a few times, can I see a listing of the owner information* over time and when the ...
18
votes
2answers
7k views

How to find domain registrar and DNS hosting with good DNSSEC support?

Simplified problem I want to buy a domain and make a website that is fully secured with DNSSEC. I want to make sure that only the one right SSL certificate could be validated by the browsers and all ...
17
votes
1answer
11k views

CNAME: does a cname change the url that the browser displays?

I have a web site www.somewhere.com and I want the alias fr.somewhere.com. I set up a CNAME record for www.somewhere.com alias fr.somewhere.com. When a user types in http://fr.somewhere.com in their ...
16
votes
1answer
19k views

Do SPF and DKIM TXT records require quotes?

I have been searching for some hours now, but multiple sources say different things. https://support.wordfly.com/hc/en-us/articles/204767474-How-do-we-publish-DKIM-and-SPF-in-our-DNS- States I should ...
16
votes
6answers
19k views

How do I check that a domain is available without triggering a grabber?

A few days ago, I checked whether a domain was available by tying the name in the web browser. Also host returned not found 3(NXDOMAIN) When I tried again today, some domain grabber had snatched it. ...
16
votes
1answer
441 views

Is it time to add IPv6 access to my websites?

I have several dedicated servers and VPS servers, and some of those are at companies that have provided me with native IPv6 blocks (in addition to the IPv4 IP addresses). Does it currently make sense ...
15
votes
4answers
43k views

How to forward emails to my custom domain to my Gmail account?

I bought a domain without webspace and want to forward emails to that domain to my Gmail account. But I don't receive any emails which are send there, not even a return-to-sender-email. I also tried ...
15
votes
8answers
19k views

Is it possible to find all subdomains for a certain domain?

a client of mine is currently hosting a web-project on one of his servers with some sub domains for previews, testing etc. Those are really hard to guess sub domains like: donottestme123789.example....
15
votes
6answers
37k views

How can I host a website on a dynamically-assigned IP address?

I recently upgraded my internet to the point that it is much faster and more reliable than my current webhost. I would like to move my current domain to be hosted at home, but my IP address is dynamic....
15
votes
2answers
19k views

Difference between CNAME and SUBDOMAIN

What is the difference between a CNAME and a Subdomain? I understand that the a cname (the left side of a domain) can point to the domain, so you can two different urls point to the same address, ie. ...
15
votes
3answers
22k views

Is it okay to have no A records for a domain?

There is one domain I'm using for email only. MX records are set up and everything works. The A records for @ and www are pointing to a machine, which just redirects to google.com. I am now wondering ...
14
votes
3answers
54k views

Can DNS point to specific port?

I got virtual machine on some server and my URL is something like this. 111.11.11.111:8002 Can I get DNS who will point to specific port ? One more thing. If I cant do that, can my virtual ...
14
votes
2answers
8k views

What is the maximum number of DNS A-records you can use on one domain?

Is it correct that there is no limit to how many DNS A records can be set on a domain? My boss asked me this and it made me curious, I can't find anything online.
13
votes
3answers
7k views

How does DNS detect changes in nameserver IP address? [closed]

Suppose I have a domain such as example.com and I configure the domain's primary and secondary nameserver to be ns1.example2.com and ns2.example2.com. Questions: Does the IP address of the ...
13
votes
1answer
820 views

Is an externally-hosted subdomain a security risk?

A company I've been developing a web site for wants to keep their current domain, which is something like company.parentcompany.com. Because we wanted to use a different CMS, the parent company ...
13
votes
2answers
287 views

Why does the ICANN Registrar list show variants of the same company multiple times?

While browsing the ICANN list of accredited registrars: https://www.icann.org/registrar-reports/accredited-list.html I've noticed that a couple of companies are registered multiple times and multiple ...
12
votes
4answers
24k views

How can I create an SPF record on my 1and1.com hosted domain?

Emails from my domain (hosted at 1and1, and using Google Apps Premier edition) have sporadically been going to recipients' spam folders lately. I did some research, tested, and found out that I do ...
12
votes
1answer
695 views

How are web applications like Tumblr, WordPress.com and Blogspot able to create subdomains for users so fast?

I am curious as to how web-applications are able to create sub-domains instantly for new users, for example, newuser.wordpress.com, or example.blogspot.com. If I need to create a new subdomain for a ...
11
votes
3answers
24k views

Is it possible to use cloudflare without having them managing my DNS?

I need to use cloudflare without having them managing my DNS, My DNS server have much more options that I do need. Instead of setting cloudflare as my dns server, I have added it as a NS record from ...
11
votes
5answers
3k views

DNS hosting better managed by Domain provider or Hosting provider?

Is it better to let DNS be managed by Domain Provider like GoDaddy/Namecheap or point the nameservers to hosting providers like Linode? What are the differences and disadvantages/advantages of both?
10
votes
2answers
5k views

How long does propagation of newly registered private name servers typically take?

I have an account with Hostgator, and have registered private name servers (ns1.mydomain.com and ns2.mydomain.com). How long should I expect to wait for those changes to take place? Should my ...
10
votes
4answers
50k views

How to host a single website on multiple servers?

I'm planning on releasing an iOS app that downloads video from my server. If hundreds of people on the launch day try to do this, then my website and the services that my server provides will clearly ...
10
votes
2answers
8k views

Why won't Webmaster Tools let me set a preferred domain? (says to verify, but it should already be)

I've got a domain that I apparently forgot to set a preferred domain for, so I just tried to do it. Webmaster Tools instead popped up a little box: Part of the process of setting a preferred domain ...
10
votes
2answers
703 views

How many domains to split components across?

I understand how splitting components across domains can maximize parallel downloads, and enable you to have cookie-free static content domains, but since there's a time cost for each domain lookup ...
10
votes
1answer
4k views

Site very slow when viewed from china

My site is very slow when viewed from china. I have used this tool for testing: http://www.dotcom-monitor.com/WebTools/website-speed-test.aspx This is the result Shangai - waterfall only the DNS ...
9
votes
2answers
1k views

Someone else is using my IP address with an old A Record. What can i do?

I found out that someone who used to have my current IP address, still has an old A record and google is using that for returning search results. As a result, when someone searches the name of my ...
9
votes
1answer
743 views

How do I leave mail at the registrar while serving the web from host?

Client's domain is registered with GoDaddy where they have a mail-only plan at the moment. Now web hosting has been set up elsewhere and we need to point web service to the new host while retaining ...
9
votes
2answers
8k views

DNS A Records with 1and1 and Heroku

I have a domain name registered through 1and1.com that I'd like to point to my Heroku app (mydomain.com and www.mydomain.com). Heroku's instructions (http://devcenter.heroku.com/articles/custom-...
9
votes
1answer
2k views

SEO and other impacts of using rel=“dns-prefetch”

I recently came across a site that had the following code: <link rel="dns-prefetch" href="//ajax.googleapis.com"> In looking it up it says it is used to Reduce DNS lookup time by pre-...
8
votes
4answers
33k views

I registered a domain name — how can I point it to my DynDNS host?

How can I host a website from my home machine? I have a DynDNS address so that even if my external IP changes, the machine is accessible. Lets say, for example, the machine is accessible at example....
8
votes
1answer
1k views

Does Google reward sites for using images from different domains, sub domains and CDN's?

I believe that images on the same domain can contribute to search engine rankings (mainly Google), example: http://example.com/image.jpg helps http://example.com So it is my understanding that using ...
7
votes
3answers
5k views

How do websites share the same IP address?

I have always been confused by the idea that multiple websites sharing the same IP address. I mean if there is a webserver out there that has an IP address. I can simply key in this IP address with ...
7
votes
2answers
2k views

Will altering my HOSTS file allow me to access sites that can't be directly accessed via IP?

I'm moving hosts over to a shared host (HostGator) and trying to access my site before DNS propagation has completed, so I can access my WP-ADMIN (which can't be done w/ temporary URLs). I'm told ...
7
votes
2answers
4k views

Why does Chrome resolve websitename.localhost as localhost?

I've been using .localhost as a TLD for locally hosted sites that I am working on. Usually when I start a new site I create an entry in the apache virutal host configuration file and then add an entry ...
7
votes
3answers
2k views

How to transfer domain from Godaddy to another provider

I'm currently using godaddy for all of my company domains, and I'm very unsatisfied with their service, specially with their site, so we are trying to migrate those domains to another provider. The ...

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