Translates domain names to IP addresses. DNS stands for Domain Name System.

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635
votes
15answers
453k views

How to clear/flush the DNS cache in Google Chrome?

As you probably know Google Chrome has its own internal DNS cache. Is there a way to clear it without having to wait for the time out or close the browser?
107
votes
5answers
14k views

How should I choose my DNS?

When I have to choose my DNS I think that I should consider: Speed Reliability Privacy Control (reports and stats) The main options that come to my mind, and how I weigh them according to the ...
70
votes
6answers
10k views

Do servers hold one website only?

As from what I understand the DNS link the domain name with the IP address of the server the website is stored on, does that mean each server can only hold one website? If they don't, how does calling ...
59
votes
4answers
6k views

How do web servers know whether you're using direct IP address access?

Some web servers, when accessed using their IP address, return an error that direct IP address access is not allowed. I've been wondering for some time how this works. I mean, doesn't the browser ...
58
votes
16answers
106k views

Why is 'ping' unable to resolve a name when 'nslookup' works fine?

On my Windows XP workstation, I can find the machine I want to connect to in DNS with nslookup: nslookup wolfman Server: dns.company.com Address: 192.168.1.38 Name: wolfman.company.com Address: 192....
57
votes
5answers
174k views

How can I direct a query to specific DNS server?

I would like to issue a query to a specific DNS server, whose IP address I know. It doesn't really matter if it's on Windows or *nix. In Windows I can do something like: C:\Documents and Settings\...
43
votes
10answers
165k views

Running DNS locally for home network

I have a small home network that just got larger (new roommate, my existing roommate got a laptop (on top of her computer), my friends coming over with laptops, etc.). I'd like to run a local DNS ...
43
votes
1answer
39k views

If Google provides public DNS 8.8.8.8 and 8.8.4.4, who provides 4.2.2.2? [closed]

In the past I was always told by colleagues 4.2.2.2 appears to work faster and have to combine that with Google's public DNS*. Using 8.8.8.8 as primary and 4.2.2.2 as secondary. However, Google only ...
42
votes
5answers
107k views

Is there a way to get the complete zone file for a domain without contacting its host?

I know that it's probably (no longer) possible because of abuse, but I want to check nonetheless. Is there a way for me to obtain the company zone file for a domain myself, without having to contact ...
38
votes
5answers
79k views

How to clear DNS cache in Ubuntu?

I'm having problems related to DNS solving in my Ubuntu 9.10. Prior complaining to my ISP I would like to refresh my local DNS cache, like in Windows we do ipconfig /flushdns. How can I do that in ...
32
votes
3answers
23k views

How do I get the mx records for a domain from *nix command line?

What is the best way to lookup MX records for a domain from the command line?
29
votes
5answers
50k views

How do I check what DNS server I'm using (on Mac OS X)

In Mac OS X, how do I check what DNS server I'm currently using (preferably a command line solution)? System Preferences > Network shows 192.168.1.1, which is my router's address and not the real ...
29
votes
3answers
5k views

How does my router resolve a URL like http://router.asus.com/ to its IP address?

Typically I connect to my router by its IP address of 192.168.1.1. However, I am also able to connect to it at the URL router.asus.com. My computer does not have a connection to the Internet. How ...
28
votes
2answers
27k views

How to get VirtualBox VMs to use host's DNS?

I use VirtualBox for my VMs. My office network setup is wireless, i.e. I connect to my company's WiFi network, which has a local DNS to resolve local names (such as something.mycompany.com going to ...
25
votes
3answers
81k views

Is there a good DNS server I can install on Windows 7 for a LAN? [closed]

I have a few computers on my LAN, and now I'm getting tired of remembering the IP addresses all the time, so I would like to start using DNS names on my LAN. I have a heterogeneous network with ...
21
votes
1answer
4k views

Why pinging “drive” gets replies from 127.0.53.53?

I'm using Firefox 31 on Ubuntu 14.04.1 I tried to open Google Drive on Firefox by typing "drive" on the address bar and then clicking on the first Google result (lazy and convoluted, I know). It ...
20
votes
7answers
47k views

Is it possible for many domain names to share one IP address?

Is it possible for many domain names to share one IP address? For example, www.xjtl.com, www.fmie.com, sdmfl.com, etc. Hundreds of domain names share just one IP – when you do a DNS query for each of ...
20
votes
4answers
28k views

How to do DNS through a proxy in Firefox?

I am using Firefox 3.5.7 with FoxyProxy. I have an ssh tunnel forwarding 8080 through to an HTTP proxy server on the other end. With FoxyProxy, I send work traffic direct but everything else goes ...
19
votes
3answers
4k views

Why can I ping google.com, but not nasa.gov?

Why can I ping google.com, but not nasa.gov? I have to ping it like this ping www.nasa.gov Is it because of DNS record of NASA? Also how does a ping response time improve? ping google.com time ...
19
votes
2answers
3k views

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.
19
votes
1answer
103k views

Unable to access most internet sites error DNS_PROBE_FINISHED_NXDOMAIN

I have problems accessing most websites, only a couple work (grooveshark, google, facebook). On almost all others I get errors. Here is what I got using different browsers: Opera: This website is not ...
19
votes
6answers
62k views

ping can't resolve hostname, but nslookup can

ping tells me that it can't resolve some hostname ("ping: unknown host domain.company.local") in a URL but when I use host or nslookup on the same computer on the command line, the resolutions works ...
19
votes
4answers
151k views

Why can't Chrome load a web page? ERR_NAME_NOT_RESOLVED

Chrome gives this error, yet I can ping the server! The server at www.odesk.com can't be found, because the DNS lookup failed. DNS is the network service that translates a website's name to ...
18
votes
9answers
4k views

Google's DNS service: Google public DNS

Google declared their free DNS service, Google public DNS: To try it out: Configure your network settings to use the IP addresses 8.8.8.8 and 8.8.4.4 as your DNS servers. They claim that: ...
18
votes
3answers
13k views

Windows 10 DNS resolution via VPN connection not working

In Windows 10, when connected to a VPN with Split Tunneling enabled (Gateway disabled), DNS resolution always uses the LAN DNS servers, ignoring the DNS servers and the DNS Suffix set on the VPN ...
18
votes
2answers
915 views

How does http://to./ work?

So I noticed this on Jeff's twitter. They don't have a tld, it seems? How've they done this? Magic, bribery, or did a no-tld tld open up recently?
17
votes
2answers
3k views

How does DNS server affect download speed?

My problem was low download speed from Mac App Store. I changed my DNS configuration to Google DNS 8.8.8.8 and it started to download over 10x faster with the same WiFi. How is this actually possible?
17
votes
4answers
8k views

Services that just return your public IP as text [closed]

I'm writing a script that does dynamic DNS updates for me, but my server is behind a router, and so I need to use a web service to determine my public IP. So far I've found this one which returns ...
17
votes
3answers
5k views

Should I use Google Public DNS service for my desktop?

What are the pros and cons of using Google Public DNS resolution service?
16
votes
4answers
30k views

Change DNS Server From Terminal (or script) on Mac OS X

How can I change my DNS server from the Terminal on Mac OS X? [I need this because my DNS is not working correctly with my VPN. Sometimes it's using the DNS for my main connection, and sometimes it's ...
16
votes
1answer
33k views

How do I alias a hostname in windows?

Same question as How to I alias a hostname? but for windows, particularly windows 7 I don't want to specify an ip address (hosts file) just an alias so that \\mylaptop points to \\longcomputername ...
15
votes
6answers
16k views

VPN: Does all traffic get routed through the VPN when I am logged in?

If I log into a slow VPN with only a 15k/s connection, when I try to go to kernel.org or some other site to download something, is everything getting routed through that other network? (so my max ...
14
votes
3answers
64k views

How often does the DNS cache clear?

How often does the DNS cache clear on a Windows 7 machine?
14
votes
3answers
23k views

How to set custom DNS server for Chrome browser?

I have local DNS server thats resolve all urls *.domain.tld to 127.0.0.1. Also I have the production server with same address *.domain.tld. They have the same names, because subdomains are interact ...
13
votes
3answers
5k views

How to know if your computer is hit by a dnschanger virus?

The Federal Bureau of Investigation (FBI) is on the final stage of its Operation Ghost Click, which strikes against the menace of the DNSChanger virus and trojan. Infected PCs running the ...
13
votes
3answers
11k views

Find IP of website via Chrome console

I have just changed the DNS records for a website, but they have yet to propagate on the East coast. Fortunately, I can see the change via my West coast proxy. I need to get the IP of the new server ...
13
votes
2answers
5k views

How will home networks work in the IPv6 world?

Right now, I have a home network setup behind a Netgear router. That router has a public IP address I get from Comcast. I also have a computer setup on my home network running Linux that runs a DHCP ...
13
votes
2answers
10k views

OS X >10.6.5 DNS Lookup Order with VPN

After updating to OS X 10.6.5 (from .4), applications don't seem to be looking up host names in the correct order (according to the service order in Network Preferences) when my VPN is connected. My ...
12
votes
2answers
51k views

Why should I use DNS 8.8.8.8? [duplicate]

Possible Duplicate: Google's DNS service: Google public DNS I was asked to put 8.8.8.8 as an alternative DNS server. Through whois I found that the IP address corresponds to the host ...
12
votes
3answers
50k views

How to find out my DNS Server address [duplicate]

Possible Duplicate: internet connection problem with windows7 What is the way to know my current DNS server address? My computer's operating system is Windows 7 and I am using a broadband ...
12
votes
5answers
15k views

Bash: lookup an IP for a host name, including /etc/hosts in search

Ubuntu 10.10+ In my script I need to lookup an IP for a given host name. If that name is listed in /etc/hosts, then command should print IP from /etc/hosts, not from DNS server. What commands I ...
12
votes
1answer
2k views

All invalid hostnames resolve to localhost in my browser. What is going on?

Update: jump to the end of this question for the happy conclusion to this epic tale. Note: I have IIS7 installed locally for web development. This is what happens in my browser for random sites: ...
11
votes
1answer
888 views

Domain goes to localhost

I have a domain named ejn.nu. On some computers and networks, it sends the user to localhost when it should send the user to my server. When i do "ping", it shows the correct ip for my server and when ...
11
votes
3answers
24k views

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 ...
11
votes
1answer
44k views

“Network is unreachable” when attempting to ping google, but internal addresses work

I can get to other PCs in my house on the 192 network, but trying to go outside gives me the "network is unreachable" message. p3p1 is up with a good IP Address. Running Fedora 16. What should I ...
11
votes
1answer
7k views

unable to create txt record using amazon route 53

I can't add the following TXT record to my Route 53 DNS config: v=msv1 t=whatever Doing so produces the following error: The record set could not be saved because: - The Value field contains ...
11
votes
4answers
25k views

Override DNS in Firefox

I'm looking for a way to override DNS entries in Firefox, for development/testing purposes. I know the normal way to do this is via the hosts file, but I cannot edit it since I don't have admin access ...
11
votes
2answers
13k views

How does circumventing IP restrictions through DNS work in the case of hulu.com?

I just heard from an australian guy that it is possible to watch hulu.com from Australia (which is actually restricted by country IP checks) by using certain DNS servers. Now I was wondering, how ...
11
votes
3answers
7k views

MacBook can't use internet, but nslookup and ping both work

I have a user with a new high-end MacBook Pro that can't use the internet. He can connect to either our wired or wireless network and do things like browse file shares, but can get no further. When ...
11
votes
1answer
7k views

How does Tunlr work?

For those of you not in the US, Tunlr uses DNS witchcraft to allow you to access US-only (and UK-only stuff like BBC radio online) services and Websites like Hulu.com, etc. without using traditional ...