How to enable name resolution in my home network?

Keve Nagy · *nix forums Guru Wannabe Joined: 21 Feb 2005 Posts: 250

Hi Everyone,

I was wondering how domain name resolution should work inside my home
network. Obviously, I was wondering about that because it didn't work
for me, and I believe that the way I fixed it is not the proper way.

The environment:

I have a FreeBSD 5.4-STABLE machine with 2 NICs. One is connected to a
DSL bridge modem (ethernet modem) and the other is to a desktop switch.
I have gateway_enable="YES" in /etc/rc.conf, and I use PPPoE to connect
to my ISP using "ppp -ddial xDSL" which creates tun0 having a public IP
address.
I use pf and its built in NAT, allowing my home network behind this
machine to access the internet.

Question #1:
How should the name resolution work on this gateway machine?
I believed that the PPPoE connection will automatically sort this out,
but obviously it didn't. I added two nameserver lines to
/etc/resolv.conf, so name resolution works for now. Is this the proper
way? Do I need to use a resolv.conf file for this? Shouldn't the
nameserver information be received via the ppp connection?

Question #2:
How should the name resolution work on a host behind the gateway?
NAT works fine. The pf rules are allowing the traffic through.
I use fixed IPs. The internal NIC in the gateway has 192.168.1.13, the
host on the LAN has 192.168.1.20, both having a netmask of
255.255.255.0. The LAN host has its gateway set to 192.168.1.13. What
should be the nameserver set to?
I tried setting it to 192.168.1.13, but that didn't work. Obviously not,
as there is no DNS running on my gateway. At the moment I entered the
same nameserver addresses that I have in the gateway's resolv.conf, but
I don't think this is the correct way.

So, how should this be done the proper way?

Do I have to install a name server to my gateway? Since I do not know
much about name servers, I would like to avoid this for now. At least
until I have some time to learn the required things about DNS and how to
install and configure one. Since I don't know it, I find it scary. But
if you think it is not that scary at all, let me know and I may give it
a try.

Regards,
Keve

--
if you need to reply directly:
keve(at)mail(dot)poliod(dot)hu

Keve Nagy · *nix forums Guru Wannabe Joined: 21 Feb 2005 Posts: 250

This is my current ppp.conf:

default:
set log Phase tun command
set ifaddr 10.0.0.1/0 10.0.0.2/0

xDSL:
set device PPPoE:rl0
set authname username@isp.com
set authkey my_PPPoE_password
set dial
set login
add default HISADDR

It appears that an "enable dns" line is what I may need, which will put
my ISP's DNS addresses to my resolv.conf. However, under some
circumstances it is not recommended.
I am trying to figure out if I need this line or not.

Keve

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if you need to reply directly:
keve(at)mail(dot)poliod(dot)hu

Stefan Ollermann · *nix forums beginner Joined: 31 Mar 2005 Posts: 45

On Wed, 19 Jul 2006 14:36:13 +0200
Keve Nagy <see_my_sig@mail.invalid> wrote:

Thomas Koellmann · *nix forums beginner Joined: 09 Apr 2005 Posts: 28

Stefan Ollermann <Stefan.Ollermann@gmx.de> writes:

Keve Nagy · *nix forums Guru Wannabe Joined: 21 Feb 2005 Posts: 250

Keve Nagy wrote:
Question #1 can be resolved with two new lines in my ppp.conf.

enable dns
resolv writable

Although, I believe having a local named is more efficient.
I will have a look at named, the example file and dnsmasq.
Thanks for the ideas, guys!
Very much appreciated!

Regards,
Keve

--
if you need to reply directly:
keve(at)mail(dot)poliod(dot)hu

Keve Nagy · *nix forums Guru Wannabe Joined: 21 Feb 2005 Posts: 250

I duplicate this message as I posted it to the wrong hierarchy earlier.

Keve Nagy wrote:
Question #1 can be resolved with two new lines in my ppp.conf.

enable dns
resolv writable

Although, I believe having a local named is more efficient.
I will have a look at named, the example file and dnsmasq.
Thanks for the ideas, guys!
Very much appreciated!

Regards,
Keve

--
if you need to reply directly:
keve(at)mail(dot)poliod(dot)hu

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