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DNSmasq - quick and dirty DNS for LAN

Authors

The Situation

Simple network within the company :

  • Fortinet NAT/router
  • Windows XP clients around room
  • Linux server (serving via Samba, potentially NFS)

I just want to name a few machines, to avoid typing in IPs all the time.

On the Server machine

# yum remove caching-nameserver
# yum install dnsmasq

Edit /etc/dnsmasq.conf, enable :

domain-needed
bogus-priv
local=/fscapital/  # For LAN addresses like server.fscapital
cache-size=1500
resolv-file=/etc/resolv-tw.conf   # so that localhost also uses dnsmasq
  • Into : /etc/host.conf:
file: "order hosts,bind"

[root@fscapital intranet]# more /etc/resolv.conf
nameserver 127.0.0.1

[root@fscapital intranet]# more /etc/resolv-tw.conf
nameserver 24.29.xx.y6
nameserver 24.29.xx.y5

After every change to /etc/hosts need to do :
# /etc/init.d/dnsmasq restart

On the Client machines

# more /etc/host.conf
order hosts,bind

# more /etc/resolv.conf
; generated by /sbin/dhclient-script
; nameserver 192.168.10.1
nameserver 192.168.10.120
domain fscapital

On the Router