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

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Running a web application without internet on ubuntu

I have a web application running on Apache server which responds to the mobile client requests over the internet. My plan is to implement this in to an offline Linux pc which does not have any ...
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DNS for home network with dnsmask: doesn't change IPs

I've got a home network: three hosts on OS X and printer. All the devices are wireless and connected into a network via Actiontech T1200H router which is also provides internet. One computer(MacPro) ...
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5 views

OpenVPN client fails to activate pushed DHCP options for DNS and DOMAIN

OpenVPN client is connecting to OpenVPN server OK. During connection, we see the options pushed contain dhcp-option of DNS 10.0.0.2 and DOMAIN prd1.o2: Sun Aug 2 17:31:06 2015 PUSH: Received ...
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22 views

Command to find domain name from IP address

I have a website with dedicated IP address. Currently it is: 184.154.225.69 If I do nslookup this IP, I get placeholder.sgded.com as output name. But I want to get my domain name, exactly how I get ...
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61 views

My ISP is blocking some sites. How do I determine where and how it is blocking it?

Anonymous account for obvious reasons Sometime in the last 12 hours, multiple Indian ISP's including mine started blocking well known "adult" and some other sites. I ran some rudimentary diagnostics, ...
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7 views

Do I need Active Directory for routing on a Windows Server?

I just use basic RRAS with NAT, DHCP, DNS(proxy/relay mode), and MS NetMon. I've been using this setup for a while and I haven't really used Active Directory at all. Is it okay to remove Active ...
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12 views

Can't get second router to assign Xbox 360 an IP address. Functions fine otherwise

Due to the layout of my house, I'm forced to use multiple broadcasting devices to cover it with signal. I have an Ethernet cable ran from an open port from my main router (the one connected to the ...
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1answer
16 views

Connecting to two Networks with different DHCP servers

Ok, So at home I have two wired Networks (one with internet access and one that doesn't) I have Multiple Network adapters on my PC and I want to use one into one network and another to the other ...
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14 views

How to check for malicious DNS records?

A router under my control has been compromised, and the attacker has changed the router's primary DNS server to one that I haven't seen before, and it does not belong to any ISP's. I'm guessing this ...
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9 views

Configuring MX using your own DNS

I'm running my own public DNS server and now working towards creating my own mail server for the domain. I have added the mx record into DNS as mx1.example.com. However, mx1 obviously doesn't point ...
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40 views

Internet connection not working

This problem is not really related to programming, but to my computer. As of this moment I'm writing from my mobile phone. Not because I want to, but because I'm forced to. Maily because I have no ...
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194 views

Ubuntu only resolves DNS when the router's IP address is present in the DNS servers list

When I use DNS servers other than my router's IP address, Ubuntu or any other application (web browser) fails to resolve host names. I have added Google's DNS servers (8.8.8.8 and 8.8.4.4) using ...
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2 views

SRV record for service on Azure VM

I am pretty new to DNS and the like and am a bit stuck. I have an XMPP server that is hosted on an Azure VM. I need to add an SRV record so that the clients and resolve the hostname from the JID but ...
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1answer
26 views

Mac unable to browse to any websites hosted at a single IP

I am unable to browse to any websites that are hosted on a single IP address - a reseller web hosting account that I manage, with a number of websites on it. This occurs in all browsers. Other ...
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10 views

No IPv4 DNS Server showing in my connection status?

How do I connect to a broadband when there is no IPv4 DNS Server showing in my connection status?
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1answer
24 views

Anyway to make OpenVPN's DNS entry the last priority?

I'm connecting from school to home. I have OpenVPN set so that only home network connections go through the VPN; it is NOT set to send all traffic through the VPN. And I would prefer to keep it that ...
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12 views

A record pointed to an external ip + virtualhosts

Good morning, I have 2 servers (#1 and #2) My domain name is pointed to #1 and there in the DNS zone I pointed the "A record" to #2 IP address, (with this setup I can have mails on #1 and website on ...
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32 views

Unable to open a single website [on hold]

I'm unable to open one particular website on my PC. Weirdest part is that the website is up and accessible from my mobile which is connected to the same network. I'm even able to ping the website from ...
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25 views

Internet drops - two routers handing out IP addresses?

My apartment block of 14 apartments share one fiber-optic internect connection. However, I've been having trouble setting up my wifi. I have two routers. 1) A D-link. This works out of the box, but ...
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28 views

IP not resolving to Domain Name

I'm using Apache as a web server, but can't get the IP of a subdomain to resolve to the domain name. My config is as below: /etc/hosts 127.0.1.1 store store 127.0.0.1 localhost ...
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2answers
15 views

Using a VPN provider thoughts about security

If i use an a VPN provider that offers Open VPN would i still have to worry about my DNS requests possilby getting messed with and that i am getting forwarded to a malware hosting site or is this ...
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16 views
+50

White Label nameservers running WHM/Cpanel DNS only with hostname alias

Our company has it's own dedicated nameservers running cPanel/WHM DNS Only, which are using the hostname ns1.ourcompany.com ns2.ourcompany.com and so forth. One of our clients is a reseller and ...
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StealRAT on unbuntu server, IP blocked by CBL. Can't work out how to remove [duplicate]

I noticed my mail.log was 4gb in size so I opened it up and it has 12 million lines similar or the same as this: Jul 19 06:53:04 dglcreative postfix/smtp[17863]: 8DAE81267C7: ...
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23 views

Wrong dns suffix is appended

I use Win7 inside a vpn, and my organization have a few dns suffixes that are used: a.myorg b.myorg c.myorg and I'm using the server server.c.myorg. And some of the time when I do ping server, the ...
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26 views

How do I simulate a DNS server returning a SERVFAIL in response to a A query?

Goal When an A query returns an NXDOMAIN response, my java app throws an UnknownHostException. I would like to know if a SERVFAIL response from DNS servers caused java to throw this error as well. ...
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32 views

nslookup can't find server

My Linux host name is Jenkins, but why it can't find it? admin@Jenkins:~$ nslookup Jenkins Server: 8.8.8.8 Address: 8.8.8.8#53 ** server can't find Jenkins: NXDOMAIN I googled ...
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1answer
42 views

How to check if the server I'm connecting to is owned by Google?

On my home machine, google.com resolves to 46.134.200.108 (public100460.xdsl.centertel.pl). WHOIS for that IP indicates that it's owned by Orange, which happens to be my ISP. On my VPS, google.com ...
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30 views

Reroute direct DNS requests on OpenWRT

On my router with OpenWRT, I use dnsmasq for DNS poisoning to block ads. If the host is on the list, the router replies to the DNS request with 192.168.99.99, which only and always serves a 1x1 ...
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43 views

How to configure DNS servers manually on Ubuntu server via bash?

I still want to use DHCP to obtain IP4 and IP6 addresses. DHCP delivers DNS servers I want that the DNS servers from DHCP are ignored and two servers I specify manually are used instead. Must be done ...
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2answers
56 views

How can I find the name of an MSA server if all I have is the domain name?

Edit (it wasn't clear what I was asking): I wanted to send email to my Verizon address by submitting it from my home network to the Verizon MSA. So my question was: how can I find the name of an MSA ...
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1answer
26 views

How can I bypass dns for one hostname on one wifi network

I'm a complete beginner when it comes to network administration, and am trying to speed up a connection when possible. I have a service on my laptop configured to connect to my server over the ...
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44 views

DNS Search Suffix: Multiple domains, multiple DNS servers

I'm at work connected to workdomain.com I use a client VPN connection to connect to homelab.com Now if I ipconfig /all I get: Windows IP Configuration Host Name . . . . . . . . . . . . : ...
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28 views

Use my home's public DNS hostname and port forwards internally

On my home gateway/router, I have multiple services running on various ports (SSH, IP camera over HTTP, etc) exposed to the internet via port forwarding. I also use these services internally while on ...
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46 views

Where in the world is 206.132.169.217?

I'm guessing some sort of location registration (at least specifying the country) is required for any public numeric IP address and tried ARIN since I believe this router is in Seattle. ARIN only ...
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Stations taking too much time log in the field [closed]

Last week I'm having a lot of complaints that computers are taking too much time to log in the field. Another error that occurs is that machines that were recently that added to the domain can not ...
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1answer
39 views

Ubuntu can't connect to IPv4 sites, and some very odd network behavior

I'm on Ubuntu 15.04 with Chrome up to date. I've been having a strange problem recently. My internet connection is wireless broadcasted from DSL (AT&T U-Verse to be exact). Viewed with ifconfig, ...
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33 views

Why am I still getting blocked by OpenDNS?

My network is blocked by OpenDNS. I know I can manually edit the host file, but that doesn't help with Bittorrent. I've tried setting up my computer with Google's Public DNS, but when I test it ...
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27 views

How do I fix my mac so that resolv.conf does not get overwritten by any VPN software?

I'm running Mac OSX Yosemite and am now having issues with my VPN since installing OpenVPN. I recently installed OpenVPN to connect to a new VPN setup. I have Junos Pulse to connect to another VPN as ...
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20 views

Custom DNS server. How they reach each other?

If I have a domain, say example.com at GoDaddy, and a dedicated server, say, 123.123.123.123. I created 2 records in my named server inside my dedicated machine telling to point ns1.example.com and ...
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28 views

OS X only picks up 1 of 3 DNS servers from DHCP on DD-WRT

I am running a DD-WRT router, and in the "Network Address Server Settings (DHCP)" section on the "Basic Setup" page, I have entered values for "Static DNS 1", "Static DNS 2", and "Static DNS 3". On ...
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25 views

Getting redirected to us.yhs4.search.yahoo.com/yhs/errorhandler : How to change that?

If there is an error in an URL or the network is down my browser is always redirected to us.yhs4.search.yahoo.com/yhs/errorhandler (possibly with a longer URL, but that is the base). I used to get ...
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30 views

List all entries (Machines and IP) in local DNS? Basically nslookup for all machines

I'm hoping someone can help. I'm struggling to work this out and hope that there is a simple way around it. I'm trying to get a list of all machines in a local DNS server. For the purposes of my ...
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1answer
30 views

Insert Hyperlink to an IP Address

I can open a browser (Chrome or Firefox or Internet Explorer) and enter an IP address in the Address bar, say: 134.170.185.46 and the browser will open the website (Microsoft.com) directly - ...
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74 views

DNS problems from command prompt

I can't get a network connection when using the command line for some reason, even though it used to work. I think it's a DNS problem because I can ping 8.8.8.8 but not google-public-dns-a.google.com: ...
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Network DNS Cache - Typical Update Time [duplicate]

I recently set up a new website, and attempted to access it before it was fully set up - resulting in a DNS error. Fast forward 24 hrs, the website is fully set up and accessible via my mobile and ...
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Strange occurrence with one specific website

A few people I know frequent a specific website. All of us have different ISPs. For some of us, it works perfectly normal. For others, the site will time out at least once every half hour. It will ...
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62 views

DNS Resolution Errors on New Active Directory (Server 2012 R2)

In advance I thank you for any help or advice you can provide as I am fairly new to the concepts and config of Active Directory and related roles like DNS, DHCP etc. I have recently set up a domain ...
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19 views

DNS not resolving using VLANs

I have a Server and Client on the same managed switch. Server is on port 18, trunked. The server has an IP of 10.0.10.101 on its default interface untagged. On the virtual interface, its tagged on ...
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14 views

Why does DNS Client not like long hosts files?

I've read that "running the DNS Client service in conjunction with a 'large' HOSTS file can cause it to put a 100% load on the CPU/core" (Wikipedia), but I haven't come across a clear explanation of ...
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28 views

Laptop is unable to load webpages in Chrome or IE, over WiFi or Ethernet. Can ping servers through Command Prompt, but only reliably by IP address

Yesterday, while at school, I downloaded and installed WAMP on my laptop, and this seems to have caused my computer to be unable to load any webpages. Before I knew about WAMP, I was partway ...