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

learn more… | top users | synonyms

461
votes
14answers
303k 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?
103
votes
5answers
12k 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 ...
39
votes
1answer
23k views

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

I was always told by colleagues 4.2.2.2 appears to work faster and have to combine that with Google's public DNS. Basically using 8.8.8.8 as primary and 4.2.2.2 as secondary. However, Google only ...
37
votes
5answers
62k 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 ...
36
votes
16answers
57k 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: ...
30
votes
10answers
101k 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)j, my friends coming over with laptop, etc ). I'd like to run a local DNS ...
30
votes
6answers
75k 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 ...
29
votes
3answers
79k 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 ...
23
votes
4answers
14k 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?
20
votes
3answers
50k 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 ...
18
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 ...
18
votes
2answers
901 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?
16
votes
7answers
23k 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 ...
16
votes
3answers
4k 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
3answers
20k 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 ...
14
votes
5answers
24k 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 ...
13
votes
3answers
23k 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 ...
13
votes
3answers
4k 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
1answer
61k 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 ...
13
votes
2answers
12k 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 ...
13
votes
2answers
4k 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 ...
12
votes
4answers
5k 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 ...
12
votes
6answers
13k 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 ...
12
votes
1answer
23k 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 ...
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: ...
12
votes
2answers
9k 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 ...
11
votes
1answer
820 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
43k views

How often does the DNS cache clear?

How often does the DNS cache clear on a Windows 7 machine?
11
votes
3answers
5k 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 ...
10
votes
18answers
10k views

Can the Internet work without DNS?

If we have an IP-based system of identifying nodes on the Internet why is there a need for DNS?
10
votes
6answers
3k views

Why does my browser take me to the WRONG site?

Sometimes I type nytimes.com and my browser takes me to usatoday.com. Sometimes google.com takes me to Bing.com. Sometimes I enter online.wsj.com (Wall street Journal), but I'm taken to ...
10
votes
1answer
6k 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 ...
10
votes
1answer
1k views

Why does my browser try to open ads from fwdsnp.com?

When I browse to some retail websites, my browser briefly directs to fwdsnp.com. From there it tries to open a popup and then forwards to the site that I actually want. I first noticed this with ...
10
votes
3answers
15k 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 ...
9
votes
4answers
4k views

How is a subdomain passed to the webserver?

I know that dns resolves an address like example.com to an IP address like 11.22.33.44, but I'm a little confused about how subdomains are resolved, so that when you type http://subdomain.example.com, ...
9
votes
7answers
58k views

Windows 7 not appending connection-specific DNS suffix

I have a Windows 7 machine I'm trying to setup for development. Typically we access our development domains using a URL like user.site.dev. The DNS is setup for user.site.dev.sd.ourdomain.com. I am ...
9
votes
4answers
10k 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 ...
9
votes
6answers
16k views

Lion / name resolution order

(this issue went away for me with the 10.7.1 update - /etc/hosts now works as always for me) I've updated my Mac to Lion and now I notice that /etc/hosts is consulted last, even after DNS. This is ...
9
votes
2answers
5k views

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? ...
9
votes
2answers
11k 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 ...
9
votes
4answers
888 views

Can I rely on my own DNS server in case of a global DNS blackout?

On March 31st 2012, Anonymous plan to take down the 13 root DNS servers that power the Internet: http://pastebin.com/NKbnh8q8 ... and I don't want to even notice if it actually happens. Assuming ...
9
votes
3answers
7k views

All my browsers suddenly don't support Javascript files anymore?

I'm experiencing the same issue as this question, which seems to be unresolved. I'll provide more detail, sot that this qualifies as a better representation of the issue. It all started after moving ...
9
votes
6answers
3k views

Is it possible to find out which upstream DNS server my router is querying? (just using dns tools)

Ok, here is the setup: I have a local router which advertises itself as the DNS server over DHCP. The DNS resolver on the router just forwards the requests to the ISP nameservers and caches the reply. ...
8
votes
2answers
15k 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 ...
8
votes
3answers
2k views

Is the www in web addresses a subdomain? [duplicate]

Possible Duplicate: Whats the purpose of the WWW subdomain? I read about sub domains at w3schools, but Wikipedia says something different. The w3schools gave the example of www being a sub ...
8
votes
2answers
20k views

What does authoritative DNS server mean?

What does authoritative DNS server mean? Can someone please explain it to me in a shorter way?
8
votes
4answers
18k 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 ...
8
votes
1answer
22k 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 ...
8
votes
5answers
8k views

What are the pros and cons of using an alternative DNS instead of the ISP DNS server?

I searched the web for answers, but I haven't found anything conclusive. What are the advantages/disadvantages of using an alternative DNS (for example, OpenDNS or Google DNS) as opposed to the ...
8
votes
9answers
14k views

Can ping fine but no browsing

I've got a laptop which has a verified internet connection. I can ping www.google.co.uk and receive a response no problem. However IE, Chrome, Firefox, MSN messenger cannot connect to the internet. ...