Domain Name System (DNS) is a service that provides the resolution of host names to IP addresses.

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How can I make my primary DNS take priority over other servers?

Note - I believe my title is the way it's meant to be... I used dnsmasq on my server and it sets DNS (via DHCP) to clients as: 192.168.2.1 (local server) ISP DNS 1 ISP DNS 2 This at least works - ...
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17 views

Exim4 DNS issues

I'm trying to forward the emails from my Debian server to my usual email address. I'm probably missing something important, as I can't find a good solution online looking for the following error ...
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Do I need to use dns bind server for name servers? [closed]

I am using server IP to redirect domains. What is the easiest way to make nameserver instead of IP ? Is it possible only to write in hosts file. for example: xxx.xxx.xxx.xxx ns.domain.com Thanks!
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27 views

DNS suddenly stops working for a particular network on a particular machine, DNS_PROBE_FINISHED_BAD_CONFIG

I'm staying somewhere for a while where there are two wifi networks. One's mediocre, one sucks. The mediocre one worked fine on my HP machine with a Realtek card running Mint for several days. ...
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1answer
17 views

Can I Mix Multiple Nameserver Sources in resolv.conf

In the list of nameservers in resolv.conf, can I use different nameservers (one from ISP, one from Google, etc..) in each line or does it all have to be from same source? Example: nameserver ...
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19 views

set network manager dns in ubuntu

I have Ubuntu 14.10. When I'm at work I can browse the internet without problems. Now that I'm at home, I can connect, but I'm not able to browse the web. Some informations: the output of ifconfig: ...
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11 views

Why won't my BIND / Apache configuration work?

I am trying to set up a BIND configuration with an Apache webserver. What I am trying to achieve is to by using the URL www.exampler.net access the content that can be found on my Apache webserver's ...
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18 views

Adding a Wildcard to PowerDNS

Ok, first, full disclosure: I'm a total noob at this and could be going about it all wrong. I'm trying to use a server on my network (in this test case a Raspberry Pi running Raspbian) as the DNS ...
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5 views

dns dsc auto refresh

I installed the DNS traffic monitoring tool DSC in the centos6.4, but the DSC Apache page is static, how to set up to automatically refresh? For example, each minute refresh time
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57 views

resolvconf writing invalid resolv.conf file

Every time I connect to my VPN I lose DNS with an error of, "cannot parse /etc/resolv.conf" The offending line is line 1 being an empty "domain". So after connecting to the VPN my resolv.conf file ...
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37 views

BIND/DNSMASQ query hanging on ubuntu server 14.04.1

I'm testing out a BIND and DNSMASQ configuration on my VPS. When I run a program which submits a bunch of queries (around 10-20 per second) my DNS replies stop coming back for a random amount of time. ...
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How do devices add DNS entries on a local network?

I have a D-Link WiFi extender DAP-1320, and somehow, when it gets plugged in, it enables my Linux box to resolve dlinkap.local to its IP address. I don't have to add anything to /etc/hosts. In the ...
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56 views

Running HMA Pro VPN on Kali Linux

I've installed HMA VPN on my Kali Linux distro but I'm having problems connecting to a VPN IP address. I run the command ./hma-vpn.sh -l "Amsterdam" for example, and then I try to connect to a ...
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2answers
246 views

apache won't restart after adding VirtualHost conf file, why not?

In a CentOS 7 server, I get the following error when I type sudo apachectl restart after I add an include file at the bottom of httpd.conf: Job for httpd.service failed. See 'systemctl status ...
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1answer
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Cannot Intentionally break/stop DNS via /etc/resolv.conf - Always resolving no matter NS config

I am still learning linux, and so far having great trouble in the networking and DNS areas - I think due to misunderstandings. My understanding is if we provide nameservers in /etc/resolv.conf these ...
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51 views

DNS/BIND configuration to resolve *.mail.*.outlook.com subdomains

I'm running BIND 9.3.3rc2 on a CentOS 5 system acting as an SMTP server. Until last week, I haven't had any problems with DNS or name resolution. The only problems I have resolving are with subdomains ...
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44 views

Explain this dig command

Please explain what this command will do and whether it can be undone: dig +nocmd strongimages.tld mx +noall +answer
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47 views

How to understand TTL values in dig command output?

I am reading about how DNS works in general. From the wiki entry of TTL, I understand TTL (Time to Live) occur in the Domain Name System (DNS), where they are set by an authoritative name server for a ...
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48 views

PowerDNS not resolving host computer

I just finished setting up PowerDNS to avoid having to remember all my IP addresses and it seems to work pretty fine, most host names resolve just fine but not the one running PowerDNS (named ...
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17 views

DNS Issues On ISPconfig3

I use ISPconfig3 to host a couple of test sites. I recently had to change my public IP address, so I made changes to ISPconfig per recommendations from the community. However, I have not been able to ...
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50 views

openwrt: dns resolving error from wifi connected devices

I am not sure what have I messed up, but I cannot resolve other pc's in my local network from the wifi-connected devices (laptops and cell phones). I have a separate tower-pc that acts as a dns and ...
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43 views

OpenConnect not resolving hostnames

I'm running LMDE 17, and I've installed OpenConnect v6 and the repository version of network-manager-openconnect. Everything is peachy, except any address for the domain companyname.local doesn't ...
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3answers
71 views

How to make resolvconf append nameservers to the list instead of prepending them?

I'm trying to configure OpenVPN to update DNS-servers as described here. That seems to work, but resolvconf prepends nameservers (and also search domains) to the list of existing nameservers. How can ...
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132 views

Reverse DNS does not match SMTP Banner for multidomain hosting

We are planing for mail hosting, we are going to host multiple customer mail domain on single public IP. Now how i am going to set PTR record per customer? because i have single IP and it has to be ...
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51 views

DNS: Can I list 1 host in 2 separate domains?

I want to test something, but I lack sufficient number of machines so I was going to overlay a subnetwork listing the same hosts under different names. I can't think of any problem with this, but I ...
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74 views

Why are NS records needed in zone-files?

I installed BIND and I am aware that it is required to have at least two NS(Name Server) records in zone-file. This is true also for reverse-zone files. I understand that NS records point to ...
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428 views

wget is unable to resolve host address 80% of the time

I have a wget 'http://xxxx.net/somepage.asp?params@abc' in a bash file. When I run it, four out of five times it says: Resolving xxxx.net (xxxx.net)... failed: No address associated with hostname. ...
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How can I go about tracking down DNS queries?

I was looking at the dnsmasq logs on a router I run and noticed that there are requests to a particular url on a regular basis. This was happening while the only client connected to the network was my ...
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28 views

Resolving DNS through HTTP/HTTPS

Is there a way to resolve DNS through HTTP/HTTPS, the case was: my ISP redirecting every DNS request to their own DNS and poisoning the DNS records. all I need is a software that could resolve ...
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62 views

centos virtual machine not registering with intranet dns server

When I am creating a Ubuntu virtual machine on virtual box it automatically registered with DNS server in my intranet network, it has both intranet IP and domain name. When creating CentOS virtual ...
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36 views

Configuring Named DNS zones (Centos7), specifically CNAME

having trouble with some DNS configuration, I have managed to get part of the site working, however adding the prefix 'www', I'm finding a little tricky. Essentially, what I want is mysite.net -> ...
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63 views

Look up ip addresses of multiple hosts with same name

Is there any way to look up the ip addresses of all hosts with the same host name? The reason I want to do this is that at work I prefer to use an ethernet connection with my laptop whenever possible ...
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271 views

Kali dnsspoof not redirecting

I am trying to do some "dnsspoof" examples in kali/linux.I set up a windows machine(client:192.168.1.24) and a kali/linux (server:192.168.1.23) I changed preferred dns address to server address in ...
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49 views

Forwarding DNS traffic for specific domain

I'm trying to control which IP address I use for DNS based on the domain string. I'm on Fedora with firewalld and have tried the command: firewall-cmd --direct --add-rule ipv4 filter PREROUTING 0 -t ...
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1answer
43 views

How do I manage resolv.conf with Puppet and NetworkManager?

I have some hosts that have explicitly managed resolv.conf files. I have others that rely on NetworkManager, which does many things including writing the resolv.conf file. Is there a consistent way ...
2
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125 views

How to completely block a website like Facebook?

I'm trying to block Facebook access from my home system (Ubuntu). I could add facebook.com to /etc/hosts, but that would only prevent accessing facebook.com. There are many other ways I could use ...
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44 views

Spoof DNS on Access Point

Hello I'm gonna try to explain the situation as best as possible, so that maybe, someone can understand well the "problem" and help me. I have on a Debian 7 and I am using 2 interfaces: -eth0: ...
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1answer
38 views

Why is ping6 using IPv4 socket?

I enabled IPv6 in a CentOS 7 server and everything is working as expected, except for ping6: it is showing 3-5 delays between requests (but the RTT is fine): $ ping6 www.google.com <...5 ...
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Should /etc/hosts contain the domain name or the FQDN?

If I want to add an entry to /etc/hosts to resolve all traffic for example.com to 1.2.3.4, do I need to add 1.2.3.4 example.com 1.2.3.4 www.example.com 1.2.3.4 smtp.example.com 1.2.3.4 ...
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How to get primary DNS server ip of specific domain?

I thought it is possible via nslookup, but when I use nslookup stackoverflow.com it gives me different ip (198.252.206.16) than whois cf-dns02.stackoverflow.com (173.245.59.4)
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First sudo always slow

The first sudo I enter on my Ubuntu 14.04 server is always slow. The password prompt displays immediately, but after I press enter it takes about 10-15 seconds until the output is printed. All sudo ...
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48 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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lynx domain shows 404 error when running from localhost

I have a strange problem and I don't know where I have to take a look to fix the issue. I am running the command lynx https://example.com/index.php from the server where the website is hosted on and ...
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76 views

Setting up domain with multiple servers

I am setting up a small web hosting service for my clients. I have my dedicated server which will be the shared server to host clients websites using WHM/cPanel. I have a separate VPS server that I ...
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85 views

Reverse DNS PTR lookups ocurring on each connection

I'm running a Debian-based VPS (Linux vps 2.6.32-042stab092.3 #1 SMP Sun Jul 20 13:27:24 MSK 2014 x86_64 GNU/Linux) which is behaving a bit strange. Whenever a new connection is established to it, it ...
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162 views

nameservers erased after systemctl restart network.service

I'm working on centos 7, and having problematic behaviour when setting network interface from dhcp to static ip configuration. I edit /etc/resolv.conf, and run systemctl restart network.service The ...
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Allow Linux to connect with addresses containing domains with dash followed by dot

I can't connect with addresses containing domains with dash followed by dot, for example: http://example-.domain.tld/ The only solution I found for this is adding domains like those to /etc/hosts, ...
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194 views

dnsmasq - how to measure DNS cache efficiency / cached items

I've configured dnsmasq as a caching-only DNS server on a Debian server, and it's working well (I'm seeing improved DNS response times via dig). However, I'd like to understand what dnsmasq is ...
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32 views

I'm trying to create a public TLD using BIND

I'm using these two guides: jackal777.wordpress.com/2013/11/19/custom-tld-for-local-network/ timg.ws/2008/07/31/how-to-run-your-own-top-level-domain/ When I run dig sokolovskaya.ssu, it looks ...
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105 views

Routing incoming source IP traffic to a loopback IP issue

I'm wanting to accomplish the following: I have a BIND DNS server setup where it is listening on ANY address and also listening in a BIND config ACL on 127.0.1.1. If there is another way where you ...