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

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DNS records - Site defualts to old https site

I updated the DNS records for a site, which has a https version of the site. Instead of going to the new site which is http not https, the browsers will want to default to the old https version of the ...
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56 views

Local DNS queries fail on server but work on clients

I have Ubuntu 14.04 server and I have Bind9 installed on it and configured. On client computers I have the DNS server address set to this server. nslookup for my custom DNS entries return the correct ...
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72 views

How to block Google DNS on my TD-W8961ND router

How to block Google DNS on my TD-W8961ND router? I want to watch my US Netflix on Chromecast here in the UK, but it will not broadcast the US Netflix over. I have been reading on a few different ...
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6 views

I need to resolve a given TLD by using a known DNS server

We have a VPN to another network and that network has a DNS server with a few resources we want to resolve by name. On a Mac I can add a file in /etc/resolver called thing.place.com inside which I ...
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881 views

How to list all DNS names pointing to an IP?

I know – for example – that there are two DNS names for an IP. However nslookup ip only returns one record. How do I get all the records for an IP?
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25 views

kernel upgrade causes ping to fail

I am facing some strange problem. I compiled the latest linux kernel and used "make localmodconfig" to create my .config file. In the new kernel "ping google.com" does not work. However the following ...
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56 views

DNS server won't work! [Bind9 running on Debian 7; virtualized through Proxmox 3.1] [duplicate]

First I'd like to thank everyone in advance for helping me - communities like this are exactly what amatuers like myself need when faced with perplexing issues. I've recently begun virtualizing ...
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480 views

DNS server isn't responding windows 8.1

I have been having a very weird problem the last week with my laptop. For some reason I lose connection to the DNS server. I have figured out that if I change the DNS server to Google's, 8.8.8.8 and ...
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205 views

Intermittently, WiFi internet stops working when connected to VirtualBox host-only adapter with no internet connection

I have a virtual network set up between an Ubuntu VM and my Windows 8.1 laptop, hooked into the Host-Only network adapter. This provides an Apache server and DNS for this specific connection. This ...
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1answer
104 views

Unable to access website via hostname, but able to access via IP

this is probably a newbie question, but I won't learn if I don't ask :) I have a ubuntu webserver that hosts my website, and I have a no-ip account that provides the hostname. I was able to access ...
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27 views

Port Routing/DNS for individual program

Problem: Flickr has closed its http api leaving an https only api. My favourite uploader is no longer maintained, so this change broke it. My current solution to this is to set up a reverse proxy ...
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41 views

DNS resolution for some domains fail but dig +tcp works

On my home internet connection, I'm able to resolve most domains but none of the sub-domains of cloudfront.net resolve. $ dig @8.8.8.8 resolver-identity.cloudfront.net ; <<>> DiG ...
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32 views

www0.sun.ac.za replies to pings?

I am working in a hosting environment. I was troubleshooting a dns issue and meant to ping www.sun.ac.za (local town university) and made a typo while specifying the host. I specified www0.sun.ac.za ...
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1answer
131 views

I cannot go to google.com and other websites due to invalid certificate; possible DNS issue?

I am using Windows 7 on my PC's and my wife and I both have IPhones. About a 2 weeks ago I was having a problem on the PC's where google.com would sometimes give a 404 not found and then in the ...
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1answer
143 views

What does “ww35” or “ww20” mean in a URL or domain, like in ww35.mydomain.com? [duplicate]

What does "ww35" or "ww20" mean in a URL or domain like, in ww35.mydomain.com? What is they used for? Why when I visit some page using these, receive a message "This IP has been banned". Which IP ...
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1answer
32 views

How can I get IP/host using windows commandline?

nslooup something.com 127.0.0.1 nslooup 10.20.30.40 127.0.0.1 will send a query to 127.0.0.1 UDP 53. I want to use "127.0.0.1:545/UDP" as a DNS resolver. Is there any good commandline tool(Open ...
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41 views

How to figure out which application is sending a DNS query on OS X?

Using Wireshark, I found some unusual DNS queries that were ad-related. But I don't know which application was doing this. Is there any way to figure that out?
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29 views

By what route do packets travel if I use an external IP address for my home server?

Question If I connect to my home server via the domain name (i.e. via the external IP address), where do the packets travel? Do they travel to the home router, to my ISP router, and then back? ...
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53 views

Have Windows Server DNS redirect request to another DNS server on the same domain

I have purchased a domain name with a registrar and am using a registrars DNS. For example I have a wiki.mydomain.com in registrar's DNS manager. It is mapped to an external IP of our web server. On ...
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1answer
14k views

How can I set up a 'local' domain so that everyone on my local network can view a locally hosted site?

I want to set up MediaWiki on one of my home machines, and then have all requests made on the local network for 'wiki.home' or 'wiki.local' point to that box. I know that this can be done by editing ...
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1answer
81 views

block network access to a domain (ubuntu)

I have a few ubuntu servers in various geographies. I want to block all outgoing connections from all ubuntu machines (all processes) to several domains, e.g. www.server.com. I know iptables can block ...
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4answers
2k views

Is it a good idea to tweak the hosts file to speed up internet browsing?

Yesterday I came across a Firefox extension called Speed DNS which claims to speed up browsing by performing DNS lookups in advance. According to the author, it "does DNS pre-resolution of all the ...
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2answers
21 views

Dns 301 to one address and A record to another

So I got domain.com. I want to make An A record pointing at 12.34.56.78 But I also want http://domain.com to redirect to http:myotherdomain.com (301) Is this possible? 12.34.56.78 is not begin used ...
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81 views

Route DNS queries for specific domain

Is it possible to configure Windows to direct DNS lookup requests for <servername>.corporatedomain.com, to a specific DNS server? I asked a question recently about routing my DNS off the VPN ...
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147 views

dynamic DNS for 3G USB modem

I had a doubt. Is it possible to setup ddns on a 3G dongle ? I want to be able to connect to the device connected to the dongle from anywhere in the world . That is, even if Ip address changes ...
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47 views

Is there a public DNS site that serves private addresses, or is there a better reliable option? [closed]

I have a private home network served by dual private DNS servers at this time. The Internet router currently serves DHCP along with the required DNS addresses. However, this entire network is very ...
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1answer
23 views

Cannot reach domain hosted within same private network

I have a website hosted on a home server, accessible from the outside by a domain name I purchased and mapped to my router's IP with help from a dynamic DNS service. The problem is that I cannot ...
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46 views

Dynamic DNS address only works externally

This is a problem which is driving me crazy lately. I use dynamic DNS to connect to a home server. Let's call the dynamic host my.home.net. I use ddclient to update the DNS record every few minutes, ...
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39 views

What could be the causes of DNS Client Event error in windows log?

Long story short(and most likely the cause). Recently had work done on my cable in front of my house, and they screwed it up several times. for about a week, looked like i could stop complaining to ...
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2answers
47 views

Is it possible to set up a dedicated global DNS server locally or on a VPS?

I'm interested in setting up a DNS server under my possession that is able to resolve hostnames on the web, in the same way as a public DNS such as 8.8.8.8 would do. My priority here is speed, ...
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14 views

Sender Policy Framework with several includes

I am resolving an SPF issue and face the following: Assume the domain foobar.com has an SPF record with v=spf1 include:a.a -all, then I lookup host -t txt a.a and find v=spf1 include:b.b include:c.c ...
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71 views

OS X not resolving hostnames for SSH/HTTP

I have a Debian server named neptune, with a static IP of 192.168.1.10 which provides SMB, Intranet and SSH services. On my Windows computer it resolves fine, yet on my Mac it appears under "Shared" ...
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2answers
964 views

How to display DNS cache without using ipconfig?

I am having a problem trying to get the DNS cache without using ipconfig. I am unable to use the ipconfig tool and was looking for an alternative command line tool to display the DNS cache, just like ...
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4answers
730 views

pings for unknown hosts ping 8.15.7.100

Running Ubuntu 9.04. I can ping hosts all day long but when I try to ping a host that doesn't exist, it instead sends pings to 8.15.7.100, which turns in to packet loss, but I'd prefer it if it told ...
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12k views

How do debug DNS name resolution? (nslookup works, but telnet doesn't)

I'm trying to connect to a website: http://superuser.com.sixxs.org i can ping the address: C:\Users\Ian>ping /6 superuser.com.sixxs.org Pinging ipv6.nginx.sixxs.net [2001:838:2:1::30:67] with ...
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111 views

Internet Explorer Slow throughout whole Network

Currently I'm facing a very strange Behaviour. I know, that Internet Explorer might be slightly slower than it's competitors, but i used to use it for various reasons. However at the moment it is ...
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2answers
129 views

What is 67.63.55.3?

On my Mac, if I ping a single-word domain, I see: PING asdfsad (67.63.55.3): 56 data bytes 64 bytes from 67.63.55.3: icmp_seq=0 ttl=241 time=93.308 ms 64 bytes from 67.63.55.3: icmp_seq=1 ttl=241 ...
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387 views

DNS issues when using VPN in Linux Mint

I'm using Windows8 as my host OS, and are running a Linux Mint VM on virtualbox, with its network being virtualized as NAT. I'm using Ciscos AnyConnect VPN to get access to a certain network. The ...
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1answer
21 views

How do I use no-ip in broaband connection from service provider?

My computer is connected to a broadband line and I have no access to the admin page. The providers use same ip for all its users, and internal ip is dynamic. So I cannot use the admin page to ...
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2answers
73 views

I would like to use same name from intranet AND Internet? [duplicate]

I host two websites that are accessable from the Internet by podcast.example.com. They are one-to-one NAT on an internal network. On the internal network, I would like to have the hosts type ...
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1answer
167 views

how can i forward requests to my own IP address to a local IP address in my network (possibly using named)?

My setup I have a linux server running in my basement. I currently have my router looking to that server for DNS lookup, so I can use named to spoof a bunch of domain names to point to my local ...
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2answers
259 views

Set up a website on my internal network and access it with a domain name instead of IP

I have a small local network, with the following devices: a Belkin n150 router (older generation), a Dell laptop running Ubuntu 14.04 LTS (GNU-Linux 3.13.0-24-generic x86_64) as my server, and another ...
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615 views

Sendmail Deferred: Connection timed out

I got the following "Connection timed out" errors from some of the email servers, like google: $ tail -1 /var/log/mail.log Jun 15 15:55:52 coral sm-mta[9924]: s5FAo29p007675: to=<me@gmail.com>, ...
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40 views

Chrome captive portal redirect is “stuck”

I have an issue with Chrome (version 35.0.1916.114) on Windows 7 with captive portal redirects. I was travelling, but am home now, so there shouldn't be any issues, but I can't browse to ...
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79 views

Windows 7 ICS - disable DNS proxy

I'm using ICS (Internet Connection Sharing) to bridge my computer's internet connection to a wi-fi hosted network. However, I would like to define custom DNS host-to-IP mappings on the ICS network. I ...
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1answer
272 views

Ubuntu+NetworkManager+openvpn - completely replace /etc/resolv.conf with openvpn pushed DNS servers?

I am running Ubuntu 12.04 LTS but have configured NetworkManager to NOT use its built in dnsmasq for DNS resolution (by commenting out dns=dnsmasq in /etc/NetworkManager/NetworkManager.conf) as ...
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1k views

How to set domain name for server running on ip address

Right now server is accessed via IP Address http://10.1xx.19.2xx:8080/svn How can i change it to http://domainname.com/svn ? Which file to edit ?
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218 views

Systemd-networkd: How can I prepend a static nameserver entry to DHCP-discovered nameservers?

I'm using systemd 213 on Arch Linux, and systemd-networkd/resolved with DHCP to connect to the internet. I'm also running a caching DNS server on 127.0.0.1. I'd like to make this server the first DNS ...
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211 views

vestacp exim4. When I send email to my server - 550 5.1.1 Recepient not found

On my server I install vesta control panel. Then configure my DNS records in domain registrator. * A my_ip @ A my_ip www A my_ip Then i create virtual host for domain. Then i create mail domain ...
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3answers
73 views

Accessing subpage of website by IP

I'm writing a php application that uses CURL to scrape data off websites. But the time it takes to load a website with curl is very, very slow. A lot slower than the time it takes to load it in Chrome ...