DNSMasq Local Network

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Revision as of 23:19, 27 August 2006 by Squisher (Talk | contribs)
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So far I've learned of 3 ways to configure the DD-WRT, so that it will perform DNS for your local network. I don't claim to know which way is preferred by the developer(s) of the DD-WRT.

1) Editting the /etc/hosts file

This is probably the first place one attempts getting this to work if you have a *NIX background. And it does work here with a **caveat** , once you've editted your /etc/hosts, you need to restart/reload DNSMasq. So for example if you populate your /etc/hosts with the startup_rc script like:

'echo    somename' >> /etc/hosts

from the startup script. You also need to put:

killall dnsmasq 
dnsmasq --conf-file /tmp/dnsmasq.conf 

in your startup script. So your script ends up looking like:

'echo    somename' >> /etc/hosts

killall dnsmasq 
dnsmasq --conf-file /tmp/dnsmasq.conf 

Lastly, if you want the router to append your domain on DNS request, put "expand-hosts" into the DNSMasq other options

2) Additional DNS Options

Administration->Services->DNSMasq (or at least in v23 SP1 Final (05/16/06) it's located in Administration->Management)

You can enter DNS info about machines in this format:


For example:


Or fully qualified:


Then things I don't like about this way are:

1) You can't have two (or more) names for the same machine in the same entry like in /etc/hosts. So instead you are forced to do:


2) I haven't been able to figure out how to have it append the domain name, so you end up needing both the short name and the fully qualified name (like above)

-comment- for v23, the trailing slash, as seen in the examples, caused it not to work. As soon as it was removed, the errors seen when re-starting dnsmasq (in ssh) went away and the service started resolving hostnames

3) Creating static leases

Static leases from Administration->Services->DHCP Server

You just hit "add", and type them in. You need to "save" settings at the bottom of the page (Duh). The thing I don't like about this method is:

1) If you do NOT want to tie MAC addresses with IPs then you have to use a fake MAC address on this form, because the info doesn't save without a MAC address

2) If you need to enter many of these, it get tedious