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Questions tagged [domain-name]

A domain name is a string that defines a realm of authority on the Internet, generally representing an Internet Protocol resource.

229 questions
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Difference between host name and domain name

What's the difference between Hostname and Domain name? especially in regards to NIC Could someone please elaborate with examples as this concept is a little confusing
rzlines
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99
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4 answers

What is the purpose of the WWW subdomain?

What's the point of having www.? Isn't it just useless extra text? Since everyone is used to it, www.google.com looks more well-balanced than google.com, but why did it start in the first place? One thing I noticed, is that google.com has the IP of…
mk12
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Can top level domains disappear if countries cease to exist / malfunction?

This question comes from a possibly stupid idea, but I want to make sure its as not-stupid as possible. I want to tattoo a QR code on my arm, that encodes a website. The domain has to be as short as possible for the QR to be as small as possible.…
Rob
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47
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3 answers

How do I redirect a domain to another domain locally?

My /etc/hosts file looks like this: 127.0.0.1 localhost 10.20.7.67 testsitealpha.dev othersite.dev testsitebeta.dev The first two work. The last one doesn't. Why not? How do I make it work? The reason I am doing this, is because I have…
Benubird
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31
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2 answers

Can a domain name have both IP addresses (IPv6 and IPv4)?

Can a domain name (example.com) have both the IP addresses, IPv6 and IPv4? Which IP address does a domain name have? IPv6 or IPv4? But I am not sure that it has both or any one at a time.
Niks
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31
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1 answer

Could "user@192.0.2.1" be a valid email address?

I study regex and faced a question: could an email address like username@192.0.2.1 be valid? Sure there is the valid username, but what about domain? Should it be domain name only or is host ip address allowed too? Of course I mean any host address,…
SkyrocketStan
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30
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4 answers

Correct domain name for a home desktop Linux machine

I have several machines running Debian, and during install, I left the domain name field blank. This hasn't affected anything so far, but I'm curious what the correct thing to set that field to is if you don't have a registered web domain and your…
nebuch
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28
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7 answers

How To Resolve IP Addresses To Domain Names?

I know it is possible to resolve IP addresses to host names but can IPs be resolved to domain names?
Boris_yo
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28
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3 answers

How can I check if a domain uses DNSSEC?

DNSSEC has been deployed on some topdomains now. But how could I see if a site/domain is using DNSSEC? Is it shown in the browser? or is there any windows or linux command to see it? or a tool for it?
Jonas
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28
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5 answers

How to choose a sensible local domain name for a home network?

Is there any convention on possible naming for local domain names (like .local), apart from not using any possible or existing top-level domain? Wikipedia says that .local conflicts with zeroconf .localhost is reserved, but is traditionally…
nidi
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26
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What is the maximum length of a domain name?

According to domain name specifications RFC 1035: 2.3.4. Size limits names 255 octets or less According to the SMTP RFC 5321: 4.5.3.1.2. Domain The maximum total length of a domain name or number is 255 octets. The RFCs are thus…
chmike
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24
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3 answers

Can't set "example.com" as a CNAME record?

I'm currently running a server at home, but I have a dynamic IP. So I subscribed to a dynamic dns service(dlinkddns.com). I made all the correct settings in my own network, and the ip updates perfectly. The problem is that I have a domainname(let's…
teuneboon
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22
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2 answers

Changing domain name - major security issue

I'm considering changing my domain name, which I've had for the past ~5 years, for a couple of reasons: Prices have gone up nearly 50% of the tld I'm using. I want to switch to .com During the years I have used emails from my domain to register at…
php_nub_qq
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21
votes
1 answer

Who controls the DNS servers?

DNS Servers are the servers that "translate" IP addresses into human readable names. How many are they? Who controls them?
Test
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21
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2 answers

How to give a domain name to a local ip?

I have a Raspberry Pi with a local ip address of 192.168.2.x (where x is a number). To make it easier to remember, I want to give it a domain name like mediacenter.raspberrypi. It is a domain name that should only work on my own network, or only on…
Kevin
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