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

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Understanding IP Information Results

Am trying to understand why some IPs like this one shows results in different country. This below output is from using IP Information function provided by DNSStuff.com. This was a key IP in ...
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34 views

Can this DNS setup ever work?

First, an anecdote involving docker, which is incidental to this question: I followed the procedure in Skydock - Automagic Service Discovery for Docker, which went well. Now I have a DNS server ...
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73 views

Windows DNS Change IPv4 vs IPv6

I want to change my DNS settings in Windows and I want to use the Google DNS Servers. In all tutorials (Microsoft or Google) I read change IPv4 OR IPv6.. What does it mean? If I change only IPv6 ...
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40 views

Resolve Subdomains to Full Domains [duplicate]

I'm trying to work out how I could configure my machine (presumably my machine's DNS settings) to resolve subdomains to the appropriate full domain of my site, mostly for shorthand purposes in ...
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85 views

DailMotion App wouldn't load Videos while DailyMotion Website works fine

I am facing a strange issue lately, When I am connected to my home Wi-Fi Network, I cannot be able to load DailyMotion videos through Android App, I have tried over dozen different phones including , ...
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How to lookup a public IP address and write only the IP address to a text file?

I have looked and found the following line of code which works fine but when run in a batch file nothing happens. for /f "skip=4 usebackq tokens=2" %a in (`nslookup microsoft.com 8.8.8.8`) do echo %a ...
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66 views

Emails from my domain treated as spam by Gmail and Outlook [duplicate]

I know that this question asked multiple times before but I have a little bit different situation. In Brief: I have reverse DNS, PTR records, SPF records, DKIM 1024-bit key, IP not blacklisted, ...
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10 views

The path of a request goes to the server [duplicate]

I have presentation about internet servers and I am going to talk about request,respond,DNS, CDNs and etc... I want a simple image that can show what happen when a request send form a client and goes ...
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127 views

Using dnsmasq to address machines by name and resolve external hostnames

I'm having some trouble with my dnsmasq setup. All I want it to do is resolve certain hostnames to certain ip addresses for any machine on my network. More specifically, I'm trying to enable all ...
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20 views

dd-wrt internal dns resolves directly for a few hosts, with a “.” for a few hosts

I have a dd-wrt router, and a bunch of static leases. The machines themselves all acquire IP through DHCP. When I do a "nslookup host1" or "nslookup host2" the correct IP address is displayed. All ...
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57 views

*.org domain websites are not loading

The problem is that any page with *.org domain in not loading on my computer (Ubuntu 14.04). Any other domains like *.com, *.net are loading! This is very strange. I tried in different browsers, and ...
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96 views

Windows Xp DNS Resolution not working

Starting off, I am working on a client computer. I was removing a FBI MoneyPack Ransomware virus from a windows xp system. Well I got rid of that and then had a problem with the firewall. I did the ...
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how can i set up BIND to use a different DNS for a specific domain

at work we are using a VPN tunnel to communicate with an external network that is set up for testing. There is also a DNS running inside this external network, and I would like to have a local DNS ...
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38 views

Why is NSLookup returning more than one record?

I am doing an NSlookup on my OSX machine and getting more than one record. 174.0.100.24.in-addr.arpa domain name pointer my-machine.domain1.domainname.com. 174.0.100.24.in-addr.arpa domain name ...
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21 views

Dig command: Is the output guaranteed to be sorted?

Let's say I'm trying to lookup the IPs mail.yahoo.com, gmail.com and mail.google.com If I execute: dig @8.8.8.8 +nocomments +noquestion \ +noauthority +noadditional +nostats +nocmd \ ...
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59 views

CNAME and MX records on naked domain

I have a domain (registered with Daily.co.uk) that for quite a while was set up with a CNAME pointed to my friend's webserver which uses dynamic DNS to resolve to his IP, in addition to MX records ...
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182 views

DNS does not work after upgrading to OSX Yosemite

After upgrading to Yosemite I can no longer get online. I can pick an IP address on the web and get a response but DNS is not working. A ping command to google.com will fail, however an nslookup or ...
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32 views

Random DNS resolution failures

I have a minecraft server setup. I have set my NS records to point to cloudflare's DNS, and I've created an SRV record which points to a CNAME record setup on another one of my domains. This cname in ...
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Usage of PTR records aside from SMTP verification

Usually, when I create a zone file, I create PTR records so that an SMTP server can perform a reverse DNS query and verify that a hostname matches the actual IP in the A record. Since SMTP ...
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130 views

I cannot access jsfiddle.net

I cannot access jsfiddle.net. My internet connection is PPPOE. I get a 502 error. Firefox says: [Fiddler] DNS Lookup for "jsfiddle.net" failed. This is usually a temporary error during hostname ...
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190 views

Postfix Reverse DNS Lookup: 450 4.7.1 Client host rejected

Postfix seems to be consistently rejecting mails from few servers though PTR lookup for those domains is successful. Please see log below. I have run out of ideas on what we can do to get this ...
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Able to receive, but not send email over SMTP from VPS. I don't think I'm being blacklisted

The error I get is "421 Downstream server error" or something similar. Up until a few days ago I could send mail without any trouble. I've searched around, and most other people with this problem end ...
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40 views

Why some hostNames are not resolved by my browser once dns-reversed?

I have some newby questions about dns. Here are the steps that lead me to those : C:\Windows\system32>nslookup google.ca Serveur : p81-004.pixelweb.net Address: 206.41.81.4 Réponse ne ...
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Can DNS service affect video streaming speed?

I am using a DNS service ( like unlocator.com) in order for me to watch Netflix.com because I am located outside US. Recently, I found that Netflix ( and also Amazon Prime) videos are very slow and ...
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DNS Servers Between Two OS

Trying to sync DNS Servers between a Linux server and a Windwos server. Anyone have an idea how to sync an UBUNTU DNS Server with a Windows 2012 R2 DNS Server?
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I can enter my website using internal/public IP, but can't enter using my domain name

Couple days ago I bought another PC just for server purpose. I have already installed Ubuntu 14.04 LTS, LAMP, Mail Server SSH Server (or Service?), also PHPMyAdmin, Webmin and TeamSpeak 3 server. ...
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114 views

DNS Resolving Issue For Mavericks

I am observing a weird issue on my Mac running Mavericks (OS 10.9.5). I am able to browse any website without any connectivity issues. However, when I check my nslookup results, I am observing weird ...
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How to log DNS queries from my home network?

I want to log all DNS lookups from computers on my home wireless network. What's the best way to do this? Options I know of: Using OpenDNS and let it log queries for me. However, in order to then ...
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40 views

Trouble extending a network with bridge

I am currently trying to extend a small computer network between 2 buildings around 1 km apart. The setup looks like this: modem | Dlink router 1 - 192.168.1.1 (antenna connected to LAN port) | ...
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22 views

Static routes in ISC DHCP

I have an Ubuntu 14.04 server at home running bind and ISC DHCP. Bind is caching from unblock-us.com so that I can get access to US Netflix content. This all works fine. I'm running into trouble ...
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64 views

Router giving wrong dns-ip address for local computer with static ip

Having a draytek vigor 2130n router on my network as a router. It is setup as hdcp server (192.168.0.200 and on) and rest pretty much default (so dns server also) also a windows server on the ...
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67 views

Configuring an offline mail server on Ubuntu LTS (likely DNS issue)?

So, the idea here is to have people connect to my VM mail server in a LAN scenario, log into a mail account I've set up with inbox contents of my engineering to do some anti-phishing training. My ...
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DNS caching not clearing Mac OSX

Something weird is happening on my machine. I'm waiting on a domain to propagate. I visit the page in chrome and it's not there yet. but if i look at it on another machine, on another ISP, it's there. ...
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How can I point my domain to a host without turning over the nameservers?

I have a domain name on GoDaddy, and a site hosted on Network Solutions. Not my choices -- I'm helping out a family member who already has that arrangement. Currently, the domain's nameserver records ...
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Purpose of serial number in DNS zone files

So a DNS zone file contains an SOA record specifying the authoritative name server, along with some other information such as a "serial number". I'm trying to understand the purpose of the serial ...
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59 views

DNS issue between Subnets

I have the following NET Configuration: ROUTER: IP #1: 192.168.17.1 IP #2: 192.168.8.10 PDC-DNS-DHCP Server: OS: WS2008R2 IP: 192.168.17.2 NAME: M2SCDC01P Domain Name: test.local ...
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How does email routing work?

I want to understand how email routing works. Lets say I am trying to send a message to someone @gmail.com. According to my current understanding, the following steps happen: DNS MX query on ...
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88 views

IPv6 Web Site, But Fails IPv6 Readiness Tests

This is driving me bonkers. I have a Windows Server 2012 R2 machine running IIS 8.5. IPv6 is working fine on this machine. All the IPv6 test sites I browse indicate this machine is indeed running ...
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26 views

What's the best practice for having a DNS entry on localhost?

Using Windows 8.1. Coming from the Linux world. I know I can edit the equivalent of /etc/hosts which is C:\Windows\System32\Drivers\etc\hosts (I think), but that seems a bit...inelegant to me. Like it ...
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Can I set hostname as a DNS Alias?

I'd like to make a local machine available (for domain network) through a www address. To do so I though I could use our DNS and set an alias like www. => MACHHINENAME. Can it be done that way?
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Sitecom 300N port forwarding access from lan

I have this modem-router: external IP: x.x.x.x (static) internal IP: 192.168.0.1 now, I have assigned x.x.x.x as www.mydomain.com, app.mydomain.com and svn.mydomain.com on public DNS. on the LAN ...
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Why is my Linux machine forgetting it's DNS settings?

I am running a Kali Linux Virtual machine, it's based on Debian. I have entered my DNS settings in /etc/resolv.conf but when I reboot or resume the virtual machine the settings are forgotten which is ...
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94 views

Changing DNS Settings: Mac Book Air Mavericks 10.9.5

Re. DNS settings. I currently use Primary 8.8.4.4 Home 8.8.8.8 Network 208.67.222.222, with 208.67.220.220 unlisted. Namebench "speed" test of these recommended DNS numbers labelled as "Primary ...
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DNSSEC- Client software

I'm interested in running DNSSEC, not sure how this works. Does DNSSEC need to be supported both on the client and server. I currently have DNSSEC on my domain hosting site and the VPS server but if ...
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email - Can running your own authoritative DNS server mask a dynamic IP hosted email server from being blacklisted?

I'm running my own email server on my ISPs dynamic IP range which is blacklisted. So when I send mail to certain mail server my email is block. When I run the same setup in a VPS, I'm not on any ...
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Is there such a thing as a web browser where you specify host and IP for testing new sites? [closed]

Does any Linux software exist where I can specify a host xyz.com and an IP. The browser will then request a page from that IP specifying that host, no DNS lookup will be performed. I regularly move ...
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20 views

How to create a nameserver?

I am hosting my own website at home. I have bought a domain .com and now I have to enter two nameservers. How can I create a nameserver that would point to my IP? I have optical fiber, so I can't ...
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18 views

How do I access subdirectories from a URL Frame

I'm using Namecheap as my registrar, and I'm hosting my page with Microsoft Azure using a linux instance. The page is hosted at <mysite>.cloudapp.net. If I change the CNAME www record within ...
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53 views

My router bypass the DNS servers I manually entered

I wanted to change the default DNS so as to use OpenDNS ones. I went to the router (192.168.0.1) and then put the DNS adress of OpenDNS in the WAN connection settings. It works and my computer ...
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69 views

How to propagate a server's host name on local DNS

I am asking this question because I don't know which network service should do this. I have a lightweight server on my LAN, and its host name is my_server. Now I would like every machine on my local ...