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

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3answers
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Windows 10, VPN and slow DNS lookups

I can't seem to figure this one out. I was using windows 7 and I had no issues with being VPN'ed into work and browsing websites. Since switching to Windows 10, it's another matter. Windows 10 and no ...
6
votes
1answer
1k views

How does Google bypass IP routing?

At the Google Public DNS Performance Benefits page, they claim In Google Public DNS, we have implemented several approaches to speeding up DNS lookup times. Some of these approaches are fairly ...
6
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4answers
2k views

Why are Microsoft based programs unable to resolve host names?

When I go to Google by IP I get: When I go to Google by domain name I get: This is confirmed by Windows Live Messenger: However, Firefox just works fine: When I do a DNS lookup I get this ...
5
votes
2answers
6k views

Does Chrome use a different DNS server from the OS?

I'm running Chrome on Linux. I have local DNS to resolve *.myname.com into 127.0.0.2 (I type "host whatever.myname.com" or "host myname.com" and I see the correct address). However in Chrome when I ...
4
votes
4answers
8k views

Windows keeps using a preferred DNS server?

I have trouble using Panera WiFi, and I finally tracked down the problem: Every time I reboot, Windows resets my TCP/IP settings for my wireless adapter to use a specific DNS server, instead of ...
4
votes
4answers
18k views

DNS resolution on Windows 7

I have Windows 7 and MacOS on Macbook Pro with cable internet connection in hotel. When I am using MacOS, internet connection is just fine. When I am using Windows 7, there is no internet connection. ...
4
votes
2answers
5k views

Remotely push DNS server to client via OpenVPN

When I try to push a DNS server via the OpenVPN server-config I don't get that server to be the first DNS server on the connected client system. It ends up being specified as an alternative DNS ...
3
votes
3answers
5k views

Find all current DNS records

I have a domain, its a client's. Their domain needs moving, but the current provider is being difficult/slow in providing details on all the existing DNS records. Plus I have not been able to get in ...
3
votes
1answer
2k views

what are some possible reasons why my company's DNS server sometimes fails to resolve the host name of some of my VM's?

I'm in charge of a group of VMs that are used by members of the group that I belong to for accessing web apps, web services, build servers, and stuff of that nature. IT is in charge of the DNS ...
3
votes
7answers
67k views

No internet through a web browser but Skype still works

We get our office broadband through a BT Business Broadband WiFi router. We have a mixture of macs and windows PC/laptops connecting to it at any one time. All devices are able to connect to the ...
3
votes
5answers
37k views

Explain output of ipconfig /displaydns

Can you please tell me what each field of the Windows command ipconfig /displaydns means please?
2
votes
2answers
13k views

How does dig +trace actually work?

When I look at the man page for dig, I get the following: +[no]trace Toggle tracing of the delegation path from the root name servers for the name being looked up. Tracing is disabled by default. ...
2
votes
2answers
8k views

Adding a domain alias in ISPConfig

ISPConfig 3 has the option to add Alias Domains in the menu under the Sites tab. The challenge is I do not understand 2 of the fields that I have to supply: Redirect Type (what is this?) Options: - ...
2
votes
1answer
1k views

Subdomains for server behind NAT

I have server (ip: 192.168.1.2, openSUSE 12.2, Apache 2) behind router (ip: 192.168.1.1, TomatoUSB Toastman Build). I'm using FreeDNS (afraid.org) and I assigned subdomain (say x.afraid.org) to ...
2
votes
2answers
7k views

What can I do to trace the origin of a DNS resolution in Windows 7?

How do I trace the origin of a DNS resolution in Windows 7? Hosts involved: Windows 7 host WIN7 where I'm trying to remove the name-to-IP mapping home router running a DHCP service host ABC renamed ...
2
votes
3answers
1k views

ad blocking host file, shared to all computers on local network

I currently update my local hosts file with advertising server domain names and direct them to nowhere. Well, almost nowhere. I point them to 127.0.0.1 and I don't have a web service running so it is ...
2
votes
5answers
2k views

What to do when an ISP intercepts NXDOMAIN requests?

I think my ISP is intercepting NXDOMAIN requests. For instance, I type http://foo.bar.baz.foobarbaz into my address bar, and I am redirected to ...
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vote
3answers
4k views

Are my connectivity issues on Windows XP related to DNS issues?

I've got a wireless local network where an XP Toshiba laptop cannot connect to the Internet, even though it had been working fine earlier in the day. Several other Mac machines connect without ...
1
vote
1answer
7k views

Prevent users from changing LAN settings

I'd like to stop my kids from changing either the LAN or WAN settings on PC or Laptop. I'm using OpenDNS and have it set to use their DNS servers, but my kids keep removing the DNS settings to access ...
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vote
2answers
1k views

Cisco VPN Client interrupts connectivity to my LDAP server

I run an LDAP server on my home network to store accounts, automount entries, etc. I spent a lot of time getting the LDAP server configured properly for OS X clients, and everything seems to work, ...
1
vote
2answers
3k views

Snow Leopard doesn't like dnsmasq?

My Macbook running Snow Leopard cannot resolve some hosts on my local network (which has a local DNS server). Running nslookup and dig works (they get the expected address from the expected server). ...
0
votes
2answers
213 views

Are MX and CNAME mutually exclusive?

I have a domain, and that domain uses another one of my domains to handle mail. I'm having trouble getting it configured in a way to make all mail clients play well with my domains. In terms of foo ...
0
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0answers
55 views

Weird phenomenon about my PC's primary & secondary DNS speed

I use DNS Jumper to test the speed of various DNS and this is the result: (A) Currently Using Primary: 203.144.207.29 (39 ms) Secondary: 8.8.4.4 (71 ms) (B) US Open DNS Primary: 208.67.220.220 ...
0
votes
1answer
667 views

Resetting gone wrong

I have reset my linksys router, and now my internet is horribly slow. please check details from command prompt below and tell me what's wrong. Thanks. Microsoft Windows [Version 6.1.7601] ...
0
votes
4answers
8k views

localhost as hostname confusion

I have a basic understanding about hostname and FQDN. Now I am confused, do I really have to specify a name for my hostname? So for example: Hostname: somename Domain: mydomain.com FQDN: ...
0
votes
2answers
2k views

Local DNS server is required to use names instead of full IP?

My computers have local IP addresses such as 192.168.0.X. And many of the computers have names such as "MyPC" or "YourPC" etc. It seems on Windows, in most cases, just using "MyPC" instead of the ...
0
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2answers
2k views

Get a Blank Web Page when opening certain sites

I get a blank web page when I try to open certain websites. I am not sure why this happens. I am able to access these sites using an anonymous proxy though. Either it has to be an issue with my ...
0
votes
1answer
2k views

How to configure a 10. network in bind? (PTR)

I'm trying to configure a zone for a 10.0.1.0/24 network. I have rfc1918 zones defined, but then I commented out 10.in-addr.arpa network, since I'm neading it. I then configured a db.1.0.10 file ...
0
votes
1answer
841 views

After a period of time, nslookup still works, but pinging, and an auto-refeshed website, fails

Contrary to this SO question this is for a dotted name (gw.localnet.au), and it doesn't happen straight away. Only after some period of time (quite a long time, possibly days). In fact this is for my ...
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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 ...
8
votes
1answer
127k views

ERR_NAME_NOT_RESOLVED in Chrome on a single site

Our internet connection at the office went down for a bit yesterday, and now Chrome can't find youtube.com. I get the ERR_NAME_NOT_RESOLVED error, even though the site loads perfectly fine in other ...
7
votes
1answer
511 views

how to clear Window DNS cache

My router reset and my ip address changed. DynDNS was updated with the new address automatically. But windows still pings the old address. How do I clear the DNS cache in Windows Vista?
6
votes
2answers
653 views

How can I store DNS cache in case the DNS server goes down?

I'm using OpenDNS's DNS servers. Today, it went down for half an hour. I'm wondering if I can store a cached copy of the DNS records of the websites that I visit often. Google Chrome does this ...
5
votes
2answers
61k views

How do I set DNS Servers on Raspberry Pi?

I want my Raspberry Pi to use OpenDNS to resolve domain names. How can I modify this setting?
5
votes
2answers
5k views

DNS resolution Issue nslookup works, but web/ping doesn't

I've got a computer having DNS problems with one address only, "microsoftonline.com". Ping doesnt resolve IP but nslookup does correctly. It works from other machines. It is WinXP with no proxies I ...
5
votes
4answers
10k views

DNS lookup fails but nslookup works

I have DNS lookup problems on my internal network. I'm using an internal DNS server with the IP 192.168.1.254. If I use nslookup everything works like it should: >hawk:~ user$ nslookup ...
4
votes
1answer
3k views

Windows 8 Chrome DNS issue

Sometimes when I want to visit random site I get "The server at www.something.here can't be found, because the DNS lookup failed" which looks pretty standard. When I go to ...
4
votes
9answers
3k views

How to make Firefox use TCP for DNS

I want to use TCP for DNS, to bypass my ISP's slow and broken DNS servers. I'm not using (and don't want to use) a proxy. Note: I want to use DNS over TCP because if I use it over udp, no matter what ...
4
votes
0answers
162 views

“dnsbackend unable to load module” error when configuring PowerDNS for Windows XP

I am in need of an easy to setup and free DNS server for Windows XP. I tried PowerDNS but am not able to use the bind back-end: When I put the following in the config file launch=bind I get error ...
4
votes
1answer
2k views

Access a Mac via hostname.local from a Windows PC

I'm the only Windows user at my workplace full of Macs. Of course, being the only person with a different setup, I'm often left to do my own IT troubleshooting. The issue I have is that everyone's ...
4
votes
6answers
4k views

DNS responding only to nslookup in Windows 7

I have an interesting DNS issue in AD (2008R2) which I can't find a way to debug. Mainly if from commandline I try ping <machinename> then I get the reply that the hostr isn't found. But when I ...
4
votes
4answers
8k views

Problem with Macbook air automatically not acquiring free wifi network dns or router address

I have this problem when my macbook air sometimes does not connect to free wifi hotspots. When the problem happens and I try to run the diagnostics, it normally gets to yellow network settings tab. It ...
3
votes
1answer
397 views

How exactly does DNS work?

I'm learning pentesting from books. So far I thought I know about DNS but now I'm completely lost and confused. well, I know what happens when you enter domain name in your browser: Say, I've ...
3
votes
4answers
9k views

How do I properly access Google through IPV6?

I'm trying to access Google through IPv6. However, it seems to want to send me back to IPv4! I did a DNS lookup on IPv6.google.com at http://centralops.net/co/ and found their IP, then tried this... ...
2
votes
2answers
581 views

How to make Opera browser obey the etc/hosts file?

Current version of Opera browser doesn't obey etc/hosts file for domains outside the local network. It looks to me like it is using its own DNS resolver. For example if I create the following ...
2
votes
1answer
320 views

What does my internet provider know about my online activities?

What does my internet service provider know about my online activites in these cases? plain server (www, ftp, whatever) connection and provider's DNS secured (e.g. TLS) server connection and ...
2
votes
2answers
2k views

In OS X, how can I prepend 127.0.0.1 to the list of DNS servers obtained through DHCP?

I am trying to use dnsmasq to resolve certain known domains using its configuration, but let the rest of the requests go through to the normal DNS server assigned by DHCP. I cannot get this to work. ...
2
votes
2answers
4k views

no internet while downloading torrents - seems dns related

I have a very peculiar problem regarding the internet connection while downloading torrents. Before you conclude that I should "reduce the # of half-open & user connections", let me say I have ...
2
votes
2answers
3k views

is it possible for a server to know which client(IP) did a DNS query for its domain name?

Let's assume I have a domain name, for example, myproxy.com. Then I have many websites, like kitty.myproxy.com , wow.myproxy.com I want to configure an authoritative DNS server for the domain name. I ...
2
votes
1answer
213 views

How do amazon EC2 instant's random DNS entry gets resolved

I am new to EC2 and please help me in understanding this better. When I created an EC2 instance it immediately got a name ec2-67-201-11-147.compute-1.amazonaws.com and I could dig them immediately. ...