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

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Using DNSMasq for Local Hostname Resolution

I'm working on setting up a home intranet for me and my roommates. My idea is that we'll be able to store things like past utility bills in a place that's more accessible than a drawer in the kitchen ...
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1answer
27 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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1answer
62 views

Can't acces DNS

I'm running CentOS as a Virtual Machine. I can access the VM's server (IP = 192.168.0.107, which displays a phpinfo() page as it should), but now I would like to acces a custom domain name: "imd.be" ...
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1answer
127 views

zone delegation in Bind

I have a lot of zones defined in my DNS server. I need to delegate one particular zone to a foreign DNS server and I don't have access to my domain-registrar control panel, currently. Is there a way ...
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24 views

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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87 views

DDNS (dynamic-dns) setup and adding a hostname to a device (to be visible on the network)

How do I provide a fixed Hostname to my device so that a netscan can shows up the device name across all platforms? How can I reach the device using the hostname/MAC-ID (something which is fixed) ...
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60 views

NSD Zone file wrong resolution

I've set up NSD with the following zone file: $ORIGIN ldom. ; my "Local DOMain" @ IN SOA lserver root.lserver ( 44 ;serial ...
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1answer
64 views

Setting up Bind9 - lsb-base not in sources

I've been having real trouble installing Bind9 following this tutorial http://forums.debian.net/viewtopic.php?f=16&t=39146 When I get to entering these commands: apt-get -y build-dep lsb-base ...
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167 views

DNS zone fallback file

I have the following DNS zone(bind): zone "." IN { type master; file "named.root"; }; If this zone directive cannot resolve the address, how can I "fallback" to another file for the same ...
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47 views

Reverse dns using dns server of domain

I need to check a reverse dns using the DNS servers of some domains. But I'm having some problems. dig -x 212.26.146.21 +short mx20.gypost.com. all ok dig -x 212.26.146.21 @8.8.8.8 +short ...
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126 views

bypass firewall with Openvpn + Squid

I have 2 VPS servers, one in China and another in the US. The server (openvpn client) in China is connected to the US one via openvpn. I also have squid running in the China server. I want to ...
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275 views

How can I use CNAME in Bind properly?

I'm new to Bind/DNS and want to point/map SMTP, webmail and IMAP to my domain but a check in nslookup is failing. How can I nslookup SMTP this way? The error I get is: smtp.stylez24.com: NXDOMAIN ...
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123 views

Make the DNS server update my host name

I have some sort of DNS server running on my router (running Asuswrt-Merlin, and I can run commands from another Linux computer by host name, i.e., ping web-server. However, when I change settings on ...
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61 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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28 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 ...
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85 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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20 views

How to locally validate DNSSEC?

I want to simulate the process of chain of trust validation locally , I do the following :- 1) signed my zone. 2) unbound installed , but i can not configure it for DNSSEC validation could you help ...
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25 views

Assign Special Records for specific remote clients DNSmasq

I'd like to make DNSmasq serve special records for specific remote clients (Clients from the public internet) So for example if remote host 111.111.111.111 requests www.example.com it returns 3.3.3.3 ...
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162 views

DNS works half of the time in Oracle VirtualBox and I can't even maintain /etc/hosts file

I have installed three Linuxes on same laptop and same VirtualBox and this is my success ratio with DNS: HortonWorks & CentOS. Worked for 5 minutes and never after that again. VM image ...
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52 views

How to add another domain (SOA) to my bind9 installation when domain has not been delegated yet. What are the delegation steps?

I have a bind9 installation on my Debian Wheezy install. On this install I have a DNS-server which acts as the SOA for a domain, example1.com. My name server is also on the same domain, example1.com ...
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299 views

How to configure Unbound to use DNSSEC?

I'm having a local caching DNS server: Unbound: [root@localhost /etc/unbound] cat unbound.conf server: interface: 127.0.0.1 access-control: 127.0.0.1 allow verbosity: 1 ...
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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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45 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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39 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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24 views

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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108 views

Postfix unable to send mail from mydomain only

My domain DNS is served by the domain registrar. I am able to send mail successfully from any address with postfix but not from mydomain.com From this machine - I only want to be able to send mail. ...
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151 views

rndc addzone failed: not found

I installed bin 9.8.4 (default) on Debian Wheezy. after configuration I tried to add a slave zone with the following command: rndc addzone test.zone '{ type slave; file "test.zone"; masters { ...
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47 views

Deliver emails outside network, from a server behind router DNS and port forwarding

I've been trying to configure webserver to deliver emails outside the local network. Server is connected directly to the router and relay on its DNS service, and one of that online service for resolve ...
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127 views

Postfix/devcot MailServer - not receiving emails

I'm new to linux and unix in general, I've worked with a shared hosting provider over the years where everything was setup for me, including email. I'm now trying to create my own mail server in my ...
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671 views

Getting Samba 4.1's “internal DNS” to update hostnames from dhcpd

Samba 4 comes with its own "internal DNS" which can be used rather than BIND. Since Samba 4's main new feature is AD replacement, I would figure that its DNS would function similarly to Windows ...
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275 views

How can I use an ACL in BIND to forward requests per zone selectively?

I have some zones declared internally as forwards to another DNS, but there is a hefty amount of IP space we do not want to be forwarded in this manner for these zones. These forwards are for very ...
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centos 6, hostname won't resolve, dns issue, loop detected

I've searched everywhere and tried all the suggestions that I've seen, but I just can't get this to work now (it was working before). This is the first time I've ever installed a test server that I ...
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473 views

How to make dnsmasq avoid DNS cache poisoning?

Some domain gets DNS cache poisoning if dnsmasq is the nameserver. But the problem is gone if switch to BIND (named). Is there a easy configuration of dnsmasq so that DNS cache poisoning can be ...
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13 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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12 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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21 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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51 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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130 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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27 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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28 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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91 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 ...
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15 views

OpenSSH: UseDNS is not enforced

I cannot get the UseDNS constraint to work. It is set to UseDNS=yes on the server running sshd. That server queries a local DNS server which is the authority for each host on the network. Each host ...
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50 views

rndc recursing usage

I have the following /etc/named.conf file con CentOS 7 options { listen-on port 53 { 192.168.0.107; }; directory "/var/named"; dump-file "/var/named/data/cache_dump.db"; ...
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36 views

DNS local area vs DNS Virtualbox

I have been trying to set up a DNS server on my system using Linux and bind. (I'm working with CentOS and Linux on my Windows 7) On my Linux everything seemed to work:I can access my server and ...
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47 views

DNS server design

Currently my company is deploying SIP phones in different locations from different boroughs. I've been asked to create static DNS records for each of the phones with the following format: ...
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49 views

How can I make CentOS 6 treating WiFi flexibly like Ubuntu 12.04?

In my office, I have AT&T Uverse. The router is a 2wire 3600HGV. The WiFI is provided by a Cisco Linksys E1000 that is plugged in the 2wire device. With my notebook running Ubuntu 12.04 LTS ...
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30 views

Debian DNS on multiple networks

I have a Debian 7 box with two nics, each nic is on its own separate internal network. I have windows dns servers on both networks. I would like the Linux box to be able to resolve local machine ...
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78 views

named.run file deleted but data left on disk?

Today I had a name-server stop resolving DNS due to the /var directory being full from the named.run cache build up. I tried removing all the files using: rm -rf name* However, although running ls ...
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109 views

Arch wifi keeps dropping

I recently installed Arch, wifi has been messing around. Dropping and generally not connecting. I fixed it by ruling it was DHCP not getting a lease in time, I assigned a static IP and all is good. ...
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1k views

Mail Server not working?

I am trying to setup mail server since a long time but as I am new to Linux I have unsuccessfully configured it to the best as I could but now I need assistance. I have installed it using the links ...