Setting up home DNS with Ubuntu Server
- by Zeophlite
I have a webserver (with static IP 192.168.1.5), and I want to have my machines on my local network to be able to access it without modifying /etc/hosts (or equivalent for Windows/OSX). My router has
Primary DNS server 192.168.1.5
Secondary DNS server 8.8.8.8 (Google's public DNS).
Nginx is set up to server websites externally as
*.example.com
Internally, I want
*.example.local
to point to the server.
My webserver has BIND9 installed, but I'm unsure of the settings. I've been through various contradicting tutorials, and so most of my settings have been clobbered. I've stripped out the lines which I'm confused about.
The tutorials I looked at are http://tech.surveypoint.com/blog/installing-a-local-dns-server-behind-a-hardware-router/ and http://ubuntuforums.org/showthread.php?t=236093 . They mostly differ on what should be put in /etc/bind/zones/db.example.local and /etc/bind/zones/db.192, so I've left the conflicting lines out below. Can someone suggest what the correct lines are to give my above behaviour (namely *.example.local pointing to 192.168.1.5)?
/etc/network/interfaces
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet static
address 192.168.1.5
netmask 255.255.255.0
broadcast 192.168.1.255
gateway 192.168.1.254
/etc/hostname
avalon
/etc/resolv.conf
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
/etc/bind/named.conf.options
options {
directory "/var/cache/bind";
forwarders {
8.8.8.8;
8.8.4.4;
};
dnssec-validation auto;
auth-nxdomain no; # conform to RFC1035
listen-on-v6 { any; };
};
/etc/bind/named.conf.local
zone "example.local" {
type master;
file "/etc/bind/zones/db.example.local";
};
zone "1.168.192.in-addr.arpa" {
type master;
file "/etc/bind/zones/db.192";
};
/etc/bind/zones/db.example.local
$TTL 604800
@ IN SOA avalon.example.local. webadmin.example.local. (
5 ; Serial, increment each edit
604800 ; Refresh
86400 ; Retry
2419200 ; Expire
604800 ) ; Negative Cache TTL
/etc/bind/zones/db.192
$TTL 604800
@ IN SOA avalon.example.local. webadmin.example.local. (
4 ; Serial, increment each edit
604800 ; Refresh
86400 ; Retry
2419200 ; Expire
604800 ) ; Negative Cache TTL
;
What do I need to add to the above files so that on a laptop on the internal network, I can type in webapp.example.local, and be served by my webserver?
EDIT
I made several changes to the above files on the webserver.
/etc/network/interfaces (end of file)
dns-nameservers 127.0.0.1
dns-search example.local
/etc/bind/zones/db.example.local (end of file)
@ IN NS avalon.example.local.
@ IN A 192.168.1.5
avalon IN A 192.168.1.5
webapp IN A 192.168.1.5
www IN CNAME 192.168.1.5
/etc/bind/zones/db.192 (end of file)
IN NS avalon.example.local.
73 IN PTR avalon.example.local.
As a side note, my spare Win7 machine was able to connect directly to webapp.example.local, but for a Ubuntu 13.10 machine, I had to make the following changes as well (not on the webserver, but on a separate machine):
/etc/nsswitch.conf
before
hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4
after
hosts: files dns
/etc/NetworkManager/NetworkManager.conf
before
dns=dnsmasq
after
#dns=dnsmasq
The issue remains that its not wildcard DNS, and so I have to add entries to /etc/bind/zones/db.example.local for webapp1, webapp2, ...
