[UFO Chicago] implementing internal DNS

[Politik Durden]

Woah, this sounds interesting. You mean people have figured out how to flash their routers with Linux ? Any details on how to do this ? The web based admin console for my Motorola allows you to browse to a file that contains firmware upgrades. So I'm guessing people have reverse engineered the file format and just made a file that flashes the device to a Linux build ? I gotta try this....post any details you have please :-) Thanks !!!!!!


--- On Sat, 8/1/09, Daniel Kelly <daniel.jp.kelly at gmail.com> wrote:


From: Daniel Kelly <daniel.jp.kelly at gmail.com>
Subject: Re: [UFO Chicago] implementing internal DNS
To: "Politik Durden" <politikdurden at yahoo.com>
Date: Saturday, August 1, 2009, 6:29 PM


LOL Ditto. I just said the exact same thing Chris Said.

The problem you may run into while installing dns services on the WRT850G is flash/ram limitations if you even can install dd-wrt on it.  I'm not sure what the dependencies would look like because I'm not familiar with the dd-wrt OS.  It's basically just busybox I think.  Maybe you could edit the /etc/hosts file on the router! It's not a persistent filesystem though so I think you have to run nvram commands on it to make it permanent.

A good case in point is the fact that dd-wrt clears out all ssh keys you generate which is a pain.


On Sat, Aug 1, 2009 at 6:21 PM, Daniel Kelly <daniel.jp.kelly at gmail.com> wrote:

That's fairly simple in theory. You make the DNS server authoritative for whatever zones you want to use e.g. mynas.mydomain.com (which may or may not really exist).  You can either use /etc/hosts which is available on all os's or you can use a dns server.  You do have to use one of those two options, but since you said you don't want to make changes to each client you are limited to using an internal DNS server. Just create a zone called mynas.mydomain.com and add an A record with the devices IP address.  You set your dns server up to forward requests to other servers so it really shouldn't be too much of a load.  You could easily do this on your WR850G if you can install linux/bsd on it.





On Sat, Aug 1, 2009 at 3:48 PM, Politik Durden <politikdurden at yahoo.com> wrote:








This may be slightly off topic but I have a feeling that the solution involves some open source tools:

I have 8 clients with a mix of wireless and wired. Mix of Macs and PCs. OSes running are MacOS, Windows, and one Fedora 11 box. 

All clients DHCP to a Motorola WR850G wireless access point/router/kitchen sink device, with some clients using the wired ports. 

This device then DHCP's to my cable modem connected to our Comcast broadband service. 

I want internal users to have certain urls resolve to internal resources (a web server, nas device, print server, whatever). How do I set this up ? I want a centralized solution so I don't have to make changes to each client. Is there a way for me to create some sort of poor mans DNS table and have all clients check this table first, before going to an external DNS server ? Generally speaking, do those kitchen sink/gateway/router/DHCP/everything boxes have this kind of functionality ?  Or am I going to have to run an internal DNS server ? That just sounds way too scary so I'm hoping someone has an easier solution. 

Thanks in advance for your input :-)


_______________________________________________
UFO Chicago -- Users of Free Operating Systems
Free Software Rules -- Proprietary Drools!
http://ufo.chicago.il.us/cgi-bin/mailman/listinfo/ufo





      
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://ufo.chicago.il.us/pipermail/ufo/attachments/20090801/35574871/attachment.htm