DNS Server Setup

To setup Local Lan based DNS Server usuing dnsmasq.

Install dnsmasq

First install dnsmasq package. From Terminal enter:

Debian

sudo apt install dnsmasq

Uncomment/update the below lines in /etc/dnsmasq.conf

Never forward plain names (without a dot or domain part)

domain-needed

Never forward addresses in the non-routed address spaces.

bogus-priv

Add local-only domains here, queries in these domains are answered from /etc/hosts or DHCP only.

local=/a.sh/

If you want dnsmasq to listen on by address (remember to include 127.0.0.1 if you use this.)

listen-address=192.168.1.11,127.0.0.1

Set this if you want to have a domain automatically added to simple names in a hosts-file.

expand-hosts

Set the domain for dnsmasq. this is optional, but if it is set, it does the following things.

Allows DHCP hosts to have fully qualified domain names, as long as the domain part matches this setting.
Sets the "domain" DHCP option thereby potentially setting the domain of all systems configured by DHCP
Provides the domain part for "expand-hosts"

domain=a.sh

To set the cachesize.

cache-size=1000

Add hosts to /etc/hosts file to be able to resolve by dnsmasq.

Example

127.0.0.1       localhost

# Manually added server list

192.168.1.1 router
192.168.1.11 zeb.a.sh zeb wiki torrent
192.168.1.12 hpnotebook

This will get you a basic dns setup for more advanced setup refer