DNS configuration issue

vesperatus · 09-14-2005, 02:10 PM

Hi,

Another day, another question regarding linux.

I have 2 server running. One is linux based and the other one is windows server 2003 based.

Linux box is called : aps02 and adress is : 10.2.100.20
Windows box : bas02 and adress is : 10.2.100.30

From the Windows box, I can do :

ping aps02 --> perfect
ping aps02.net2.xxx --> perfect
ping 10.2.100.20 --> perfect

No problems at all there.

From the Linux box :

ping bas02
ping: unknown host bas02 --> WRONG

ping 10.2.100.30 --> perfect
ping bas02.net2.xxx --> perfect

Files from the linux configuration :

/etc/hosts

Code:

127.0.0.1       aps02.net2.irg       aps02        localhost.localdomain   localhost

/etc/resolv.conf

Code:

search xxxx.com
nameserver 10.2.100.20

Now, with the host cmd :

[root@irgaps02 log]# host bas02.net2.xxx
bas02.net2.xxx has address 10.2.100.30

Dig :

Code:

dig bas02.net2.xxx

; <<>> DiG 9.2.1 <<>> bas02.net2.xxx
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 21416
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 1

;; QUESTION SECTION:
;bas02.net2.xxx.             IN      A

;; ANSWER SECTION:
bas02.net2.xxx.      86400   IN      A       10.2.100.30

;; AUTHORITY SECTION:
net2.xxx.               86400   IN      NS      aps02.net2.xxx.

;; ADDITIONAL SECTION:
aps02.net2.xxx.      86400   IN      A       10.2.100.20

;; Query time: 1 msec
;; SERVER: 10.2.100.20#53(10.2.100.20)
;; WHEN: Wed Sep 14 15:06:57 2005
;; MSG SIZE  rcvd: 90

To summarize, i need to acces bas02 from my network. For some reason, bas02.net2.xxx is accessible but not bas02 ?!

Anyone can point me to a config file where I could fix that problem ?

Or is that a problem that is in my Windows box ?

issinho · 09-14-2005, 03:11 PM

Well, you could edit the hosts file to enable the translation.

Also, looks like your network is setup with the DNS server being the Linux Box, am I correct? Check out some HowTos on setting up a Linux DNS.

vesperatus · 09-14-2005, 03:30 PM

Yep, the linux box is the DNS server.

Seem to be working now however.

edited the file hosts and added :

10.2.100.30 irgbas02.net2.irg irgbas02 localhost.localdomain localhost

restarted network service and seems to be working now.

Quote:

Well, you could edit the hosts file to enable the translation.

What would that exactly do and how could I do such a thing.
Most important part here being : What would that exactly do

issinho · 09-14-2005, 03:42 PM

Well, you already edited the file and it works, right?

Why: Well, basically, your Linux box goes to that file to determine the numeric address of the name you type in. For example, If I want to go to www.linuxquestions.org, my machine first looks to the hosts file to see what that numeric address is. If it doesn't find it there, it looks to a machine that might carry that answer (the DNS). From there it continues until it is denied or cannot find a server that knows that numeric address.

Editing the hosts file is one way to cut the journey. If you wish to deny access to a certain site, you can add this line to the hosts file:

www.whatever.com 0.0.0.0

This will tell the browser that the address of whatever.com is 0.0.0.0 (not a real address so it says it cannot be found.

The hosts file was originally created at the dawn of the internet, when there were only 10 or so computers using it. So, it was easy and simple to edit. Try that today and you'll spend your life doing it. Today DNS servers take over the role of the hosts file. But you can still edit it anyway and make your resolutions faster.

That's kind of "What it does" and "why it works"

vesperatus · 09-14-2005, 03:49 PM

Quote:

That's kind of "What it does" and "why it works"

Thx very much for that

. Those are the anwser I like most.

I dont like the "Do this and stfu" comments. I like to understand what i'm doing.

Thx again.