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

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3
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7answers
73k 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 ...
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 http://wwwwe.web-help-service.net/search?qo=foo.bar.baz....
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 router,...
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
2answers
9k 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: - ...
1
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
1answer
8k 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 ...
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). ...
1
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 ...
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
722 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
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
votes
1answer
842 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 ...
0
votes
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 ISP'...
0
votes
0answers
56 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 (...
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 ...
7
votes
1answer
520 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?
7
votes
6answers
28k views

Can ping IP address and nslookup hostname but cannot ping hostname

I have a DNS server set up on one of my machines using BIND 9.7 Everything works fine with it. On my Windows 7 desktop, I have statically-assigned all network values. I have one DNS server set -- my ...
6
votes
2answers
667 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
4answers
16k views

Host name resolution on a home network

I have several machines (both virtual and physical) in my internal network at home. Currently I have to connect via 1P addresses. The one main machine I connect with to all the other machines is ...
5
votes
3answers
5k views

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

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 ...
5
votes
2answers
68k 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?
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
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 ...
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
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 ...
3
votes
2answers
689 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 ...
3
votes
1answer
413 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
2answers
196 views

NETGEAR DGN2200v2 router's DNS server not working properly

I have configured my DGN2200v2 to do the following: Reserve the LAN address for my mac to 10.0.0.11 Use 10.0.0.11 as primary DNS server, and 8.8.8.8 as secondary Now I would expect the router to ...
3
votes
4answers
10k 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
1answer
224 views

Malicious program changing my DNSs

Some weeks ago I started having problems with my internet connection, it was extremely slow and suddently some websites (specifically gmail, facebook, youtube and twitter) started failing to connect, ...
2
votes
1answer
347 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
0answers
226 views

Junk mail criteria used by Exchange and/or Outlook

Is there any documentation, official or unofficial, about how email ends up in the junk folder? Emails from a domain that I am hosting ends up in my junk folder, and presumably in everybody else's ...
2
votes
1answer
3k views

Where did this incorrect cached DNS lookup come from?

Somehow, I've been having a chronic issue where my computer will get an invalid DNS lookup in its cache for either of the two Exchange servers I use from Mail.app. My workplace runs one of the ...
2
votes
1answer
217 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. ...
2
votes
3answers
3k views

Host your own website and dns server

I pay big money yearly for all of my website hosting, domain registrars, etc. My IP is dynamic and my provider allows different http ports. On my local webserver, I have access to my websites like ...
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
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
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
5answers
9k views

Bypassing Router's DNS Settings

Is there a way to bypass my ISP provided CPE/router's DNS settings? I'd like to use OpenDNS but I am unable to access the administrator acount of the CPE. I tried logging in using the default ...
2
votes
1answer
817 views

PHP/cURL/Fedora issues resolving hostname possibly a DNS problem?

I have the following simple test script for cURL/php on a FC12/apache server that has PHP 5.3.2, cURL v7.19.7 (according to phpinfo()): $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, 'http://www....
2
votes
2answers
949 views

Create a local DNS TLD for development

I do a lot of web dev, mainly RoR and PHP, I've got a VMs which holds my dev environments and handling multiple clients on them is a pain. With PHP you just create a subdir, but with RoR it's a little ...
1
vote
1answer
270 views

My external IP address appears to change automatically [duplicate]

I am trying to use the no-IP service to get a domain name for my dynamic ip address. I use some tools on line to detect my IP, and they tell me that my IP address is 88.207.251.1. So I bind this IP ...
1
vote
3answers
2k views

dnsmasq not working to point .local addresses to 127.0.0.1

I'd like to get .local addresses (such as test.local) to point to 127.0.0.1 but it isn't working. I'm on latest Ubuntu. In /etc/NetworkManager/NetworkManager.conf I commented out dns=dnsmasq then did ...
1
vote
1answer
40 views

Acrylic DNS Hosts not refresh

I've installed current version (0.9.31) acrylic DNS on Windows 8 machine and set DNS address to 127.0.0.1 in TCP/IP v4 settings. Then I added in ArcylicHosts entry: 127.0.0.1 *.dev for wildcards. ...
1
vote
2answers
163 views

Propagating Names for non-machine IP addresses in a home network

I have added two IP addresses in the network config of one of my PCs, and I'm using those IP addresses to host separate sites in IIS: I can browse those sites from around my network no problem by IP ...
1
vote
2answers
48 views

Overriding DNS in peer-peer fashion

I frequently have the problem that I am on a local network where DNS is done by routers I have no control over. I often want to send files or data between two of my devices on the same subnet, but ...
1
vote
4answers
8k views

Why common two IP addresses for two nameservers in one server

In this common case: ns1.domain.com: IP1 ns2.domain.com: IP2 What I know the two IP addresses used like if one unreachable, the other will use as a secondary choice and user still can access the ...