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

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why do queries with status “refused” get answers?

I'm wondering about why would that be. It's even stranger if you simply "dig +short" the record - you get the response, but clients can't make use of that. I've had a quick look at the RFC, but I was ...
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30 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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16 views

Is it possible to mix zones with DNSSEC enabled and disabled in BIND?

I have a dozen domains configured in a set of zones in BIND and I need to add a new one with DNSSEC enabled. If I enable DNSSEC: options { dnssec-enable yes; dnssec-validation yes; }; Will ...
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117 views

OpenVPN, resolvconf, and DNS domain resolution

While at site1, I need to connect to site2 via OpenVPN. Once connected, the OpenVPN site2 pushes a DNS nameserver and domain search options. This causes all name resolutions for site1 to fail. ...
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41 views

OpenVPN nameservers ignored by NetworkManager or whatever

I'm using Elementary OS. I've followed a dozen suggestions from different websites and nothing helps. I use OpenVPN client to connect to an office network. The company I work for has provided me the ...
2
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59 views

How is resolv.conf maintained when there are two network cards?

I have a Debian Wheezy VMware virtual machine guest with two network cards. One is in bridged mode and has access to the internet. The other is in host-only mode and does not. Some process, perhaps ...
2
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113 views

DNS resolution problem with OpenBSD

During boot up, messages flashed on my computer screen, among which are the following: DHCPACK from 192.168.200.1 bound to 192.168.200.12----> renewal in 432600 seconds The contents of my ...
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92 views

After changing network openvpn keeps querying stale dns

After changing network connection in my laptop (fedora 21) openvpn clinet is unable to resolve server address so every several seconds same line appears in logs: RESOLVE: Cannot resolve host address: ...
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33 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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332 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 ...
2
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82 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

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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415 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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10 views

Configure Bind to use specific server as starting point for recursive query?

I'm attempting to setup a Bind DNS server which (for security purposes) is highly limiting. Essentially I only want to allow DNS queries to be made to a particular set of DNS servers which do not ...
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33 views

Using Ubuntu Server machine as a DHCP and DNS server to forward URL's to IP addresses

I'm inexperienced with Linux servers but I've done okay so far - basically I want this machine to dish out IP addresses via DHCP (done) and then I also want it to act as a DNS server that simply sends ...
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28 views

Does dnsmasq automatically update when running as a dhcp server as well?

I want to set up dnsmasq on a Raspberry Pi to use as a DNS server for my home network. My goal is to have a setup where when a new device is connected to the home network, it can be addressed by its ...
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156 views

dhcp ipv6 dynamic prefix delegation

I'm trying to setup Linux-based home gateway with IPv6 support. IPv4 configuration is finished and I'm using IPv4 NAT, ISC DHCP for addresses allocation, PowerDNS for local DNS setup, PDNS recursor to ...
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91 views

Can not reach local DNS server for local dot domain subzones because firewall returns gateway IP

I have pfSense inline between my cable modem and my switch, on pfSense I have a NAT port forward on 53 to my local DNS server which I want to serve local subzones to the LAN with. Right now when I dig ...
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17 views

how to troubleshoot domain name before re-pointing Nameservers

suppose I have a site: awesomefootball.com hosted on a Linux server with db etc.. For testing, I know how to pull a copy to my MacBook and set up /etc/hosts file to let me test at ...
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326 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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109 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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179 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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106 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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87 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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64 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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145 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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293 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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59 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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893 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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389 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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4k views

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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4 views

why samba 4 is giving the following error attempting to join to domain

trying to join windows 7 clients to samba 4 that is using named as name server i am getting the following error: An attempt to resolve the DNS name of a domain controller in the domain has being ...
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13 views

mass_dns: warning: Unable to determine any DNS servers. Reverse DNS is disabled

I'm using UBUNTU 14.04 as virtual machine on windows using VMWARE , after logging i installed nmap but after trying to run nmap -sP 10.42.0.0 i get the following message mass_dns: warning: ...
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29 views

CentOS DNS Server for localhost

I need install the DNS Server (BIND - CentOS 7) to work only locally. I mean, the same CentOS that has the BIND will connect/search in the DNS, any other host will 'connect' with this machine. The ...
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42 views

OpenVPN is working but not DNS resolution

I am using : uname -a Linux 2.6.32-042stab108.5 #1 SMP Wed Jun 17 20:20:17 MSK 2015 x86_64 GNU/Linux This is my server config: cat /etc/openvpn/server.conf | egrep -v "#|;" port 1194 proto udp ...
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37 views

enable/disable domain redirection

My router can be joined by clientes. enable // I'd like to redirect all trafic to an IP (13.37.42.1), I mean any IP and any domain. disable // Then I d like to be able to disable it. Then clients ...
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27 views

How Can I Set Up DNS Server on Virtual Network w/out Internet?

I'm trying to set up a virtual network populated with 4 CentOS 7 servers for testing purposes. I have successfully configured a Kerberos server and a secondary Kerberos server. However, when it ...
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13 views

Bind config options (recursion and forwarders)

I am trying to setup bind to authorize one zone and cash all other requests from provider nameserver. Do two options recursion and forwarders have linked values and affect each other? Should I list ...
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26 views

Misc file corruption freebsd 10 and dns zone file

The computer is a VPS from Vultr. They tell me that "since it is loaded into RAM and not really a drive, nothing on the host would be causing this." One particular file, my zone file, will come up ...
0
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135 views

named-checkzone fails reverse zone file with NS has no address records (A or AAAA)

I'm setting up a private DNS server using bind9 on raspian. I'm receiving this error on my reverse zone file: named-checkzone dthacker.org db.dthacker.org.inv root@dns:/etc/bind# named-checkzone ...
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73 views

Can you install a Smart DNS server on Ubuntu server?

I'm a fan of smart-DNS services like "unblock" and so, as it gives me the VPN functionality (the part of the functionality that I need..) and saves me of server resources, such as traffic. I was ...
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20 views

dnsbind not working from client end

I am trying to configure dnsmasq in a virtual environment. I have created 2 VMs in VMWare Work Station. Was successful in installing and configuring DNS Server and able to do nslookup of client and ...
0
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210 views

Centos 7 Slow Resolve

After installing Centos 7, I noticed that DNS lookups for addresses saved in /etc/hosts take long time, here is example: time curl -X get http://localhost real 0m0.159s user 0m0.004s sys ...
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47 views

Unable to capture DNS requests on server

I am trying to route all DNS queries from my computer through my server. My laptop seems to be sending the queries to the server, but I'm unable to monitor them on the server. On the client (my ...
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19 views

Turning off dhcp name resolution in dnsmasq

I configured dnsmasq to forward queries to 168.192.in-addr.arpa to another server, but if I send an request for an address to dnsmasq, and there is a device configured via dhcp with a name then ...
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67 views

Why must a server know its own host-name and domain-name?

In Linux, a server can set its own host-name and domain-name through sethostname() and setdomainname(). I just wonder, however, why must a server know its own host-name and domain-name? To my ...
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89 views

How to Setup dns in Virtual machine

I want to know how dns resolve the name. DHCP server installed in one vm. How to setup dns in the virtual machine and what are the configurations I need to do. And when i start another vm, it needs ...
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13 views

BIND cannot map one name

I setup a BIND sever. Let domain be example.com, httpd running. There is a separate zone for aliases to another domain, different.com I setup zone file for different.com to be: am IN CNAME ...
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136 views

How can I have hosts register their IPv6 addresses in Windows DNS

Windows clients support registering their IPv4 and IPv6 addresses in DNS after obtaining the address from a DHCP server or via IPv6 Router Advertisements. For my CentOS 7 and Fedora 21 boxes I'd like ...
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161 views

connman connections extremely flaky and slow

I'm trying to configure my system to be able to connect via either ethernet or wifi with connman. I was able to hotplug my ethernet with systemctl restart dhcpcd.service previously, but I'd like to ...